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Burhan OZTURK

ORDU UNIVERSITY, Horticulture, Assist Prof. Dr.

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Phone: +905062036255
Address: Ordu University , Faculty of Agriculture,
Department of Horticulture,
52200, Cumhuriyet District, Altınordu-
Ordu/TURKEY

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Papers by Burhan OZTURK

Aminoethoxyvinylglycine and Foliar Zinc Treatments Play a Key Role in Pre-Harvest Drops and Fruit Quality Attributes of ‘William’s Pride’ Apple

Acta Scientiarum Polonorum Hortorum Cultus, 2019

Effects of pre-harvest aminoethoxyvinylglycine (AVG, 250 mg L–1) and zinc (0.3% ZnSO4) treatments... more Effects of pre-harvest aminoethoxyvinylglycine (AVG, 250 mg L–1) and zinc (0.3% ZnSO4) treatments on pre-harvest fruit drops, internal ethylene concentration (IEC), flesh firmness, color characteristics (L*, chroma and hue angle), soluble solids content (SSC), acidity, total phenolics, antioxidant activity, flesh and leaf micronutrients and macronutrients of ‘William’s Pride’ apples, were investigated in this study. AVG was sprayed 4 weeks before the anticipated harvest date and Zn was sprayed when the fruits reached the size of a walnut. As compared to the control, both the single AVG and zinc treatments significantly reduced the pre-harvest drops. However, combined AVG + Zinc treatments were found to be more effective in reducing the pre-harvest drops. At the last measurement date (15th of August), 60% fruit drop was measured in control, but 22% in AVG + Zinc treatment. AVG and AVG + Zinc treatments reduced ethylene synthesis. On the other hand, single zinc treatments stimulated e...

Red Chief Elma Çeşi̇di̇nde, Ami̇noethoxyvi̇nylglyci̇ne’Ni̇n (Avg) Ve Naftalen Aseti̇k Asi̇t’İn (Naa) Hasat Önü Döküm Ve Meyve Kali̇tesi̇ Üzeri̇ne Etki̇si̇

ANADOLU JOURNAL OF AGRICULTURAL SCIENCES, 2012

Bu çalışma Tokat ekolojik koşullarında Red Chief elma çeşidinin (Malus domestica Borkh.) hasat ön... more Bu çalışma Tokat ekolojik koşullarında Red Chief elma çeşidinin (Malus domestica Borkh.) hasat önü dökümünü azaltmak ve meyve kalitesini artırmak amacıyla yürütülmüştür. Bu amaçla 150, 300, 600 mg L-1 aminoethoxyvinylglycine ve 20 mg L-1 naftalen asetik asit, tahmini hasat tarihinden 4 hafta önce deneme ağaçlarına püskürtülmüştür. Çalışmada kümülatif döküm yüzdesi (%), kopma direnci (N), nişasta indeksi, meyve rengi (L*, C*, h°), meyve ağırlığı (g), suda çözünebilir kurumadde miktarı [SÇKM, (%)], pH, titre edilebilir asitlik (g.malik asit 100-1) ve meyve eti sertliği (N) ölçümleri yapılmıştır. Tahmini hasat tarihinde AVG'nin 300 ve 600 mg L-1 dozları dökümü azaltmada kontrol ve NAA uygulamasından önemli düzeyde (P<0.05) farklı bulunmuştur. Kopma direnci, AVG'nin artan dozları ile artmıştır. Tahmini hasatta ve 15 Eylül'de, nişasta indeksi bakımından uygulamalar arasında fark tespit edilememiştir. Tahmini hasat tarihinde AVG'nin artan dozları ile meyve ağırlığı doğrusal olarak artmıştır. Tahmini hasat tarihinde, AVG ve NAA meyvenin SÇKM'sini pozitif yönde etkilemiştir. Genel olarak pH miktarı tahmini hasada doğru azalış göstermiştir. Tahmini hasatta, titre edilebilir asitlik değeri bakımından hem AVG hem de NAA kontrol ile benzer bulunmuştur. Tahmini hasada doğru et sertliğinde doğrusal bir azalış tespit edilmiş, ancak AVG'nin artan dozları et sertliğini pozitif yönde etkilemiştir.

Braeburn Elmasının (Malus domestica Borkh.) Hasat Önü Dökümü ve Meyve Kalitesi Üzerine Hasat Öncesi Bitki Gelişim Düzenleyici Uygulamalarının Etkisi

In this study, effects of pre-harvest applied aminoethoxyvinylglycine (AVG) and napthaleneacetic ... more In this study, effects of pre-harvest applied aminoethoxyvinylglycine (AVG) and napthaleneacetic acid (NAA) treatments on the pre-harvest drop and fruit quality of ‘Braeburn’ apple were investigated. Experimental trees were treated with three different concentrations (150, 225 and 300 mg L) of AVG and 20 mg L NAA 4 weeks before anticipated harvest date. Results which were obtained revealed that NAA and AVG treatments significantly decreased pre-harvest drops compared to control treatment. AVG treatments significantly delayed peel color development. The fruit weight was significantly reduced by 225 and 300 mg L AVG concentration at 1, 8 and 15 October harvest date. AVG treatments were more effective in retaining of flesh firmness. But NAA treatment significantly reduced both flesh firmness and fruit removal force at anticipated harvest. AVG treatments significantly delayed starch degradation, and reduced soluble solids content. 225 and 300 mg L AVG-treated fruits exhibited higher tit...

The Effect of Aminoethoxyvinylglycine (AVG) and Napthalene Acetic Acid (NAA) on the Preharvest Drop and Fruit Quality in Monreo Peach Variety

Bu calisma Monreo seftali cesidinin hasat onu dokumunu azaltmak ve meyve kalitesini artirmak amac... more Bu calisma Monreo seftali cesidinin hasat onu dokumunu azaltmak ve meyve kalitesini artirmak amaciyla yurutulmustur. Bu amacla tahmini hasat tarihinden 4 hafta once 150 ve 225 mg L–1 aminoetoksivinilglisin, 2 hafta once ise 10 ve 20 mg L–1 naftalen asetik asit, deneme agaclarina puskurtulmustur. Calismada, hasat onu dokumu (%) ve bazi meyve kalite ozellikleri [suda cozunebilir kuru madde (SCKM, %), pH, meyve eti sertligi (kg), titre edilebilir asitlik (TA, g malik asit 100 mL-1), meyve rengi ozellikleri (L*, Kroma, hue°)] belirlenmistir. Tahmini hasat tarihinde AVG uygulamalari dokumu azaltmada kontrol ve NAA uygulamalarina gore onemli duzeyde (P<0.05) farkli bulunmustur. AVG ve NAA uygulamalari meyvenin SCKM icerigini pozitif yonde etkilemistir. Genel olarak pH degeri tahmini hasada dogru azalis gostermistir. Tahmini hasada dogru et sertliginde dogrusal bir azalis tespit edilmis, ancak AVG’nin artan dozlari et sertligini pozitif yonde etkilemistir.

Effect of foliar applied zinc on yield, mineral element contents and biochemical properties of pear varieties grafted to BA-29 rootstock

Journal of the Faculty of Agriculture, 2012

In this study, the effects of foliar zinc application on yield, fruit quality characteristics, mi... more In this study, the effects of foliar zinc application on yield, fruit quality characteristics, mineral content, chemical and biochemical properties of three different pear cultivars (Akca, Santa Maria and Deveci) under the semi arid ecological conditions of Tokat Province were investigated. Zinc (Zn) application did not cause any significant differences on fruit yield, average fruit weight and the average geometric diameter of pear varieties. But the fruit flesh hardness of Akca variety was significantly reduced (P<0,05) with the zinc application. While zinc application reduced the titratable acidity (TA) from 0,33 g/100 g to 0,15 g/100 g of Akca variety, TA of Deveci variety significantly increased from 0,22 g/100 g to 0,28 g/100 g. Zinc application significantly (P<0,05) reduced the total phenolics of Akca and Deveci varieties. Similarly, the zinc application significantly (P<0,01) reduced the total antioxidant activity of Akca variety according to the radical scavenging ...

Effects of methyl jasmonate on quality properties and phytochemical compounds of kiwifruit (Actinidia deliciosa cv. ‘Hayward’) during cold storage and shelf life

Introduction Kiwifruit with a unique taste, flavor, and aroma is quite rich in dietary fiber, ant... more Introduction Kiwifruit with a unique taste, flavor, and aroma is quite rich in dietary fiber, antioxidants, minerals, vitamin C, and phenolic compounds. It is mostly used in treatment of gastrointestinal disorders. Parallel to increasing consumptions, world kiwifruit production has also been continuously increasing every day (Huang, 2016; Ozturk et al., 2019a). Since the kiwifruits are not at sufficient ripeness for consumption at harvest time and are easily perishable, cold storage is an essential process in kiwifruit trade in order to prevent product buildup in markets and to regulate the supply chain. However, quality losses throughout cold storage and shelf life, especially flesh softening, cause significant economic losses for both the producers and traders. Therefore, recent researches mostly focused on ethyleneinhibiting practices, including aminoethoxyvinylglycine and 1-methylcyclopropene, salicylic acid, putrescine treatments, and modified atmosphere packaging (

Determination of Fruit Quality Properties of Loquat Genotypes Grown In Ordu Province of Turkey

International Journal of Scientific and Technological Research, 2018

This study was conducted to determine the quality attributes of loquat fruit grown in Ordu provin... more This study was conducted to determine the quality attributes of loquat fruit grown in Ordu province of Turkey, in 2015. In the study, fruit weight, fruit sizes, color characteristics, seed and flesh weight, fruit firmness, pH, SSC and titratable acidity were investigated. The highest (35.52 g and 41.91 mm) and lowest (16.02 g and 31.13 mm) values in terms of fruit weight and fruit length were obtained from Ordu-1 and Ordu- 17 genotypes, respectively. The highest fruit width (41.05 mm) and fruit thickness (39.33 mm) were measured from Ordu-12 genotype. The b * value of the fruit ranged from 46.28 (Ordu-3) to 53.79 (Ordu-8). The seed number ranged from 1.40 (Ordu-24) to 4.80 (Ordu-19). The highest flesh weight (29.04 g) was measured from Ordu-1 genotype. The flesh weight/seed weight ratio varied from 5.04 (Ordu-25) to 2.70 (Ordu-14). Compared the other genotypes, Ordu-1 genotype was higher firmness values than other genotypes. Both the highest SSC value (14.50%) and the lowest acidity...

EffEct of AVG trEAtmEnts on somE physico-mEchAnicAl propErtiEs And color chArActEristics of ApplE ( Malus doMestica Borkh . )

Ozturk, B., E. AltuntAs, Y. OzkAn and k. Yildiz, 2012. Effect of AVG treatments on some physico ... more Ozturk, B., E. AltuntAs, Y. OzkAn and k. Yildiz, 2012. Effect of AVG treatments on some physico mechanical properties and color characteristics of apple (Malus domestica Borkh.). Bulg. J. Agric. Sci., 18: 889897 the purpose of this study was to determine the effect of AVG treatments on some physicomechanical properties and color characteristics of apple. three levels of AVG as AVG0 (0 mg l1, nontreatment), AVG1 (100 mg l1) and AVG2 (300 mg l1) were used. the geometric mean diameter, fruit mass, bulk density increased from 69.03 mm to 70.40 mm, from 186.8 g to 191.0 g, and from 352.5 to 374.3 kg m3, whereas, the sphericity of apple decreased from 1.087 to 1.078 as AVG doses in creased, respectively. the surface area, projected area and volume increased with AVG doses. L* value increased from 43.75 to 45.88, whereas, chroma decreased from 40.07 to 39.68 as AVG doses increased from 0 to 300 mg l1, respectively. the static coefficients of friction on rubber and galvanized m...

‘Deveci’ Armudunun Şeker ve Organik Asit İçeriği Üzerine Anaçların Etkileri

Bu calismanin amaci 2011-2015 yillari arasinda ‘Deveci’ armudunun ( Pyrus communis L.) seker ve... more Bu calismanin amaci 2011-2015 yillari arasinda ‘Deveci’ armudunun ( Pyrus communis L.) seker ve organik asit icerigi uzerine 3 farkli anacin [BA 29 ve EMC ( Cydonia oblonga ) ayva ve armut coguru ( P. communis) ] etkilerini belirlemektir. Arastirmada anaclar bakimindan meyve orneklerinde organik asit olarak; okzalik asit, tartaric asit, malik asit, askorbik asit, asetik asit, sitrik asit, fumarik asit ve propiyonik asit, sekerler olarak ta; fruktoz, sukroz, glikoz ve toplam seker incelenmistir. ‘Deveci’ armudunda malik, askorbik ve propiyonik asit baskin organik asitler olarak belirlenmistir. Malik ve askorbik asit icerigi BA 29 anacindan elde edilen meyvelerde, EMC ve cogur anacindan daha yuksek bulunurken propiyonik asit icerigi cogurde daha yuksek bulunmustur. Malik asit icerigi BA 29 anacinda en yuksek (3425.3 mg 100 g -1 ), cogur de ise en dusuk (2976.5 mg 100 g -1 ) miktarda bulunmustur. Tartarik, askorbik, asetik, sitrik ve fumarik asit bakimindan anaclar arasinda onemli fa...

Change of Fruit Quality Properties of Jujube Fruit (Ziziphus Jujuba) without Stalk and with Stalk during Cold Storage

This study was conducted to determine the change of fruit quality properties of jujube fruit (Ziz... more This study was conducted to determine the change of fruit quality properties of jujube fruit (Ziziphus jujuba) without stalk and with the stalk during storage. The fruit without and with stalk were stored at 0 ± 0.5°C and 90 ± 5% RH during 45 days. Also, fruit were placed inside modified atmosphere packing (MAP). The presence of the stalk of the fruit was effective in reducing quality losses in storage. The weight loss, decay ratio and vitamin C loss of fruit that were stored without stalk were higher. There was no change in soluble solids content and acidity ratio depending on fruit stalk presence. Total phenolic, total flavonoid, and antioxidant activity values were lower in fruit without stalk at the end of the storage. With the MAP application, the weight loss and decay rate of the fruit decreased in storage. In addition, fruit firmness, acidity, and vitamin C losses were lower in MAP-treated fruit. At the end of the storage, total phenolic, total flavonoid, and antioxidant acti...

The effects of pre-harvest napthalene acetic acid and aminoethoxyvinylglycine treatments on storage performance of 'Ak Sakı' apple cultivar grown in Erzincan conditions

This study was carried out to determine the effects of pre-harvest aminoethoxyvinylglycine (AVG, ... more This study was carried out to determine the effects of pre-harvest aminoethoxyvinylglycine (AVG, 150, 225 ve 300 mg/L) and naphthaleneacetic acid (NAA, 20 mg/L) treatments in different doses on storage performance of ‘Ak Sakı’ apple cultivar (Malus domestica Borkh.) in 2012. The changes on some fruit quality parameters were measured at 2±1 o C temperature and with 90±5 % relative humidity at 45 days interval during storage. The lowest weight loss was obtained from 300 mg/L AVG treated fruits during the storage. In the all analysis date, the highest L* value was obtained from 300 mg/L AVG treated fruits, and the lowest hue angle value was reported from the fruits of control treatment. The flesh firmness was determined that the best kept in the 225 and 300 mg/L AVG treated fruits during the storage. The flesh firmness significantly reduced with NAA treatment at the end of storage. The highest soluble solids concentration (SSC) was obtain from control fruit during the storage, whereas ...

Effect of plant growth regulators on fruit quality and biochemical content of '0900 Ziraat' sweet cherry cultivar

Journal of Tekirdag Agricultural Faculty, 2013

ABSTRACT This study was carried out in Tokat ecological conditions to determine the effect of met... more ABSTRACT This study was carried out in Tokat ecological conditions to determine the effect of methyl jasmonate (MeJA) and aminoethoxyvinylglicine (AVG), applied 3 weeks before anticipated harvest date, on fruit quality and biochemical content of ‘0900 Ziraat’ sweet cherry (Prunus avium L.) grafted on Gisela 5 rootstock. In the study 100 and 200 mg L-1 AVG doses, and 2240 mg L-1 MeJA dose were used. Compared to control treatment, the fruit weight significantly increased with 100 mg L-1 AVG and MeJA treatment. Geometric diameter significantly increased with only MeJA treatment, whereas, flesh firmness significantly decreased with only MeJA treatment. The flesh / stone ratio increased with 100 mg L-1 AVG and MeJA treatment. L* and hue angle with 200 mg L-1 L AVG, chroma value with 100 mg L-1 AVG, and a* value with both AVG treatment significantly increased. The soluble solids concentration and pH value significantly decreased with MeJA treatment, whereas, the titratable acidity increased with MeJA. Total phenolic compounds and total anthocyanin significantly decreased with 100 mg L-1 AVG and MeJA treatment. The total antioxidant capacity significantly decreased with only MeJA treatment.

The Efficacy of Aminoethoxyvinylglycine (ReTain) For Improving Fruit Set on ‘0900 Ziraat’ Sweet Cherry

A study was carried out to determine the effect on fruit set and fruit quality of different rates... more A study was carried out to determine the effect on fruit set and fruit quality of different rates of applications [control (0 mg L-1), 250, 500 and 750 mg L-1] of AVG applied to ‘0900 Ziraat’ sweet cherry variety grafted on MaxMa 14 rootstock. Compared to the control, it was determined that fruit set on the trees applied with AVG increased from 97.5% to 130.4%. While the soluble solids content was significantly decreased, significant differences in fruit quality (fruit weight, fruit sizes, flesh firmness, titratable acidity, ripening index and color characteristics) were not observed between control and AVG treatments. There was significant difference between AVG rates with regard to soluble solids content. The lowest SSC value was obtained from the 500 mg L1 AVG treatment

Maturity Stages and MAP Affect the Quality Attributes and Bioactive Compounds of Cornelian Cherry Fruit (Cornus mas L.) During Cold Storage

Erwerbs-obstbau, 2021

The present research was conducted to investigate the influence of the harvest maturity stages an... more The present research was conducted to investigate the influence of the harvest maturity stages and modified atmosphere packaging (MAP) on quality of cornelian cherry fruit. The cornelian cherry fruit (Cornus mas L.) were used as the plant materials in this study. Weight loss of MAP-treated fruit was lower than the untreated. At harvest and end of the storage, the greatest respiration and ethylene production rates were measured from M‑1. MAP-treated fruit were maintained firmness and had lower decay. At the end of the storage, the greatest soluble solids and acidity were obtained from M‑2. Also, vitamin C contents of M‑1+MAP were greater than M‑1, M‑2 and M‑2+MAP. At harvest and on 15th, 30th and 45th day of the storage, anthocyanin of M‑2 was greater than M‑1. At the last two periods of the storage, flavonoid contents of MAP-treated fruit were greater than the untreated. During the storage, M‑2+MAP had greater phenolic contents than the other. The greatest antioxidant activity at th...

The Influence of the Rootstocks on Biochemical and Bioactive Compound Content of ‘0900 Ziraat’ Sweet Cherry Fruit

Erwerbs-Obstbau

The study was conducted to determine the effects of different rootstocks (Ma × Ma 14, GiselA 5, G... more The study was conducted to determine the effects of different rootstocks (Ma × Ma 14, GiselA 5, GiselA 6 and SL 64) on quality properties and bioactive compounds of ‘0900 Ziraat’ sweet cherry fruit. Fruit weight, thickness and length of Ma × Ma 14 and SL 64 was higher than the GiselA 5 and GiselA 6. Firmness of GiselA 6 was lower than the other rootstocks (Ma × Ma 14, GiselA 5 and SL 64). The chroma value of GiselA 5 was greater than the other rootstocks, whereas the hue angle of SL 64 was lower than the other rootstocks. While the lowest SSC and acidity was obtained in GiselA 5, the highest vitamin C was determined in Ma × Ma 14. Total phenolics and total flavonoids, thus antioxidant activity of GiselA 6 and SL 64 rootstocks was higher than Ma × Ma 14 and GiselA 5 rootstocks. Catechin was the major phenolic acid in ‘0900 Ziraat’ sweet cherry fruit. GiselA 6 had higher catechin and 4‑hydroxybenzoic acid content than the other rootstocks. As a result, it was revealed that sweet cherry rootstocks were effective on bioactive compounds and fruit quality characteristics.

Fresh-cut fruits and vegetables: Quality issues and safety concerns

Fresh-Cut Fruits and Vegetables

DETERMINING OF THE FRUIT CHARACTERISTICS OF PISTACHIO GRAFTED ON WILD Pistacia terebinthus L. UNDER THE CENTRAL KELKIT BASIN/TURKEY ECOLOGICAL CONDITIONS

Acta Scientiarum Polonorum Hortorum Cultus

The study was carried out to determine fruit quality characteristics in „Uzun” pistachio cultivar... more The study was carried out to determine fruit quality characteristics in „Uzun” pistachio cultivar grafted on terebinth rootstock (P. terebinthus L.) in Suşehri under Central Kelkit Basin/Turkey ecological conditions in 2017. In the study, it was determined that the ratio of the split fruit was 80%; the blank fruit ratio was 8%; nut weight was 0.93 g; kernel weight was 0.50 g and kernel ratio was 53.8%. As a result of analyses, it was assessed that the fruit consists of 19.39% protein, 3.74% moisture, 2.38% ash, 53.30% fat, 7182.45 mg/kg potassium, 4046.79 mg/kg phosphorus, 1592.96 mg/kg calcium, 974.35 mg/kg magnesium, 16.14 mg/kg iron, 4.42 mg/kg manganese, 11.38 mg/kg copper and 27.05 mg/kg zinc. It was determined that the total phenolic content was 1989.8 mg GAE kg–1 dw, the total flavonoid content was 363.0 mg QE kg–1 dw; DPPH was 30.9 mmol TE kg–1 dw; FRAP was 36.2 mmol TE kg–1 dw.

Effects of preharvest GA3, CaCl2 and modified atmosphere packaging treatments on specific phenolic compounds of sweet cherry

Turkish Journal of Food and Agriculture Sciences

The fruit of sweet cherry are more sensitive against external factors than many fruit species so ... more The fruit of sweet cherry are more sensitive against external factors than many fruit species so post harvest quality loss on sweet cherry is quite higher. For this reason, it is very significant to reduce the postharvest losses and to extend the storage period in sweet cherry, and this is one of the main objectives for producers and consumers. The aim of the study was to determine the effects of GA3, CaCl2 and modified atmosphere packaging (MAP) applications on individual phenolics compounds in postharvest storage on sweet cherry. In the study, GA3 was applied at 30 mg L-1 concentration when fruit skin was yellow-straw, and CaCl2 was applied at 0.5% concentration 20 and 10 days before the estimated harvest date. The study consisted of 4 different spray (Control (water only), GA3, CaCl2, GA3+ CaCl2) and 2 packaging aplications (without and with MAP). MAP was applied to the fruit after the harvest. In our study, individual phenolics such as catechin, 4-hydroxybenzoic acid, epicatechin, caffeic acid, p-coumaric acid, 4-aminobenzoic acid and protocatechuic acid were determined. It has been determined that pre-harvested GA3, and CaCl2 applications have increased the content of individual phenolics in fruit. The concentration of individual phenolics generally decreased with increasing cold storage time, whereas epicatechin and 4-hydroxybenzoic acid concentrations increased. 4-hydroxybenzoic acid and caffeic acid concentrations were higher CaCl2, and GA3 treatments than in control in all measured period. The MAP application had a positive effect on the losses of other phenolic compounds except catechin during cold storage.

BIOACTIVE COMPOUNDS AND PHYSICO-MECHANICAL ATTRIBUTES OF FRUIT AND STONE OF CHERRY LAUREL (Prunus laurocerasus) HARVESTED AT DIFFERENT MATURITY STAGES

Acta Scientiarum Polonorum Hortorum Cultus

In the study, physico-mechanical properties [geometric mean diameter (D g), sphericity, surface a... more In the study, physico-mechanical properties [geometric mean diameter (D g), sphericity, surface area, weight (W), bulk and fruit density, color, fruit removal force (FRF), puncture and compression force, puncture and compression deformation, friction coefficient] and biochemical attributes [pH, soluble solids content (SSC), titratable acidity (TA), vitamin C, total phenolics (TPs), total monomeric anthocyanin (TMA) and total antioxidant capacity (TAC)] of cherry laurel fruits (Prunus laurocerasus) and stones were investigated. Geometric mean diameter, surface area, fruit weight, bulk and fruit density significantly increased, but L*, a* and b* values significantly decreased with the progress of ripening. Fruit removal force decreased from 5.04 N to 3.09 N. On the other hand, W/FRF increased with the progress of harvest date. Static friction coefficient of fruits significantly increased over plywood and silicone surfaces and friction coefficients of stones increased over plywood, galvanized mild steel and silicone surfaces with the progress of harvest date. The pH, SSC, vitamin C, TPs, TMA and TAC (according to FRAP and TEAC assay) values significantly increased with the progress of ripening. It was concluded that fruit maturity stage at harvest had significant impact on physico-mechanical attributes and bioactive compounds of cherry laurel fruits.

Piraziz elmasının soğukta muhafaza ve raf ömrü üzerine avg ve aloevera uygulamalarının etkisi

Akademik Ziraat Dergisi

This research was conducted to determine the effects of post-harvest Aloe vera and pre-harvest AV... more This research was conducted to determine the effects of post-harvest Aloe vera and pre-harvest AVG treatments on cold storage and shelf life of Piraziz apple. The study was investigated fruit quality characteristics as weight loss, colour characteristics (L*, chroma and hue angle), fruit flesh firmness, soluble solids content (SSC), titratable acidity (TA), pH and starch degradation during cold storage and shelf life. Weight loss was significantly delayed in AVG-treated fruits during cold storage. Fruit flesh firmness significantly reduced with all treatments during cold storage and shelf life. Soluble solids content increased until 60 th day of cold storage and shelf life for all treatments, and then decreased. TA value decreased during cold storage and shelf life for all treatments. Starch degradation occurred in all treatments during cold storage and shelf life and AVG treatment retarded. Conclusion, AVG can be used as a tool to maintain fruit quality for a longer time.

Aminoethoxyvinylglycine and Foliar Zinc Treatments Play a Key Role in Pre-Harvest Drops and Fruit Quality Attributes of ‘William’s Pride’ Apple

Acta Scientiarum Polonorum Hortorum Cultus, 2019

Effects of pre-harvest aminoethoxyvinylglycine (AVG, 250 mg L–1) and zinc (0.3% ZnSO4) treatments... more Effects of pre-harvest aminoethoxyvinylglycine (AVG, 250 mg L–1) and zinc (0.3% ZnSO4) treatments on pre-harvest fruit drops, internal ethylene concentration (IEC), flesh firmness, color characteristics (L*, chroma and hue angle), soluble solids content (SSC), acidity, total phenolics, antioxidant activity, flesh and leaf micronutrients and macronutrients of ‘William’s Pride’ apples, were investigated in this study. AVG was sprayed 4 weeks before the anticipated harvest date and Zn was sprayed when the fruits reached the size of a walnut. As compared to the control, both the single AVG and zinc treatments significantly reduced the pre-harvest drops. However, combined AVG + Zinc treatments were found to be more effective in reducing the pre-harvest drops. At the last measurement date (15th of August), 60% fruit drop was measured in control, but 22% in AVG + Zinc treatment. AVG and AVG + Zinc treatments reduced ethylene synthesis. On the other hand, single zinc treatments stimulated e...

Red Chief Elma Çeşi̇di̇nde, Ami̇noethoxyvi̇nylglyci̇ne’Ni̇n (Avg) Ve Naftalen Aseti̇k Asi̇t’İn (Naa) Hasat Önü Döküm Ve Meyve Kali̇tesi̇ Üzeri̇ne Etki̇si̇

ANADOLU JOURNAL OF AGRICULTURAL SCIENCES, 2012

Bu çalışma Tokat ekolojik koşullarında Red Chief elma çeşidinin (Malus domestica Borkh.) hasat ön... more Bu çalışma Tokat ekolojik koşullarında Red Chief elma çeşidinin (Malus domestica Borkh.) hasat önü dökümünü azaltmak ve meyve kalitesini artırmak amacıyla yürütülmüştür. Bu amaçla 150, 300, 600 mg L-1 aminoethoxyvinylglycine ve 20 mg L-1 naftalen asetik asit, tahmini hasat tarihinden 4 hafta önce deneme ağaçlarına püskürtülmüştür. Çalışmada kümülatif döküm yüzdesi (%), kopma direnci (N), nişasta indeksi, meyve rengi (L*, C*, h°), meyve ağırlığı (g), suda çözünebilir kurumadde miktarı [SÇKM, (%)], pH, titre edilebilir asitlik (g.malik asit 100-1) ve meyve eti sertliği (N) ölçümleri yapılmıştır. Tahmini hasat tarihinde AVG'nin 300 ve 600 mg L-1 dozları dökümü azaltmada kontrol ve NAA uygulamasından önemli düzeyde (P<0.05) farklı bulunmuştur. Kopma direnci, AVG'nin artan dozları ile artmıştır. Tahmini hasatta ve 15 Eylül'de, nişasta indeksi bakımından uygulamalar arasında fark tespit edilememiştir. Tahmini hasat tarihinde AVG'nin artan dozları ile meyve ağırlığı doğrusal olarak artmıştır. Tahmini hasat tarihinde, AVG ve NAA meyvenin SÇKM'sini pozitif yönde etkilemiştir. Genel olarak pH miktarı tahmini hasada doğru azalış göstermiştir. Tahmini hasatta, titre edilebilir asitlik değeri bakımından hem AVG hem de NAA kontrol ile benzer bulunmuştur. Tahmini hasada doğru et sertliğinde doğrusal bir azalış tespit edilmiş, ancak AVG'nin artan dozları et sertliğini pozitif yönde etkilemiştir.

Braeburn Elmasının (Malus domestica Borkh.) Hasat Önü Dökümü ve Meyve Kalitesi Üzerine Hasat Öncesi Bitki Gelişim Düzenleyici Uygulamalarının Etkisi

In this study, effects of pre-harvest applied aminoethoxyvinylglycine (AVG) and napthaleneacetic ... more In this study, effects of pre-harvest applied aminoethoxyvinylglycine (AVG) and napthaleneacetic acid (NAA) treatments on the pre-harvest drop and fruit quality of ‘Braeburn’ apple were investigated. Experimental trees were treated with three different concentrations (150, 225 and 300 mg L) of AVG and 20 mg L NAA 4 weeks before anticipated harvest date. Results which were obtained revealed that NAA and AVG treatments significantly decreased pre-harvest drops compared to control treatment. AVG treatments significantly delayed peel color development. The fruit weight was significantly reduced by 225 and 300 mg L AVG concentration at 1, 8 and 15 October harvest date. AVG treatments were more effective in retaining of flesh firmness. But NAA treatment significantly reduced both flesh firmness and fruit removal force at anticipated harvest. AVG treatments significantly delayed starch degradation, and reduced soluble solids content. 225 and 300 mg L AVG-treated fruits exhibited higher tit...

The Effect of Aminoethoxyvinylglycine (AVG) and Napthalene Acetic Acid (NAA) on the Preharvest Drop and Fruit Quality in Monreo Peach Variety

Bu calisma Monreo seftali cesidinin hasat onu dokumunu azaltmak ve meyve kalitesini artirmak amac... more Bu calisma Monreo seftali cesidinin hasat onu dokumunu azaltmak ve meyve kalitesini artirmak amaciyla yurutulmustur. Bu amacla tahmini hasat tarihinden 4 hafta once 150 ve 225 mg L–1 aminoetoksivinilglisin, 2 hafta once ise 10 ve 20 mg L–1 naftalen asetik asit, deneme agaclarina puskurtulmustur. Calismada, hasat onu dokumu (%) ve bazi meyve kalite ozellikleri [suda cozunebilir kuru madde (SCKM, %), pH, meyve eti sertligi (kg), titre edilebilir asitlik (TA, g malik asit 100 mL-1), meyve rengi ozellikleri (L*, Kroma, hue°)] belirlenmistir. Tahmini hasat tarihinde AVG uygulamalari dokumu azaltmada kontrol ve NAA uygulamalarina gore onemli duzeyde (P<0.05) farkli bulunmustur. AVG ve NAA uygulamalari meyvenin SCKM icerigini pozitif yonde etkilemistir. Genel olarak pH degeri tahmini hasada dogru azalis gostermistir. Tahmini hasada dogru et sertliginde dogrusal bir azalis tespit edilmis, ancak AVG’nin artan dozlari et sertligini pozitif yonde etkilemistir.

Effect of foliar applied zinc on yield, mineral element contents and biochemical properties of pear varieties grafted to BA-29 rootstock

Journal of the Faculty of Agriculture, 2012

In this study, the effects of foliar zinc application on yield, fruit quality characteristics, mi... more In this study, the effects of foliar zinc application on yield, fruit quality characteristics, mineral content, chemical and biochemical properties of three different pear cultivars (Akca, Santa Maria and Deveci) under the semi arid ecological conditions of Tokat Province were investigated. Zinc (Zn) application did not cause any significant differences on fruit yield, average fruit weight and the average geometric diameter of pear varieties. But the fruit flesh hardness of Akca variety was significantly reduced (P<0,05) with the zinc application. While zinc application reduced the titratable acidity (TA) from 0,33 g/100 g to 0,15 g/100 g of Akca variety, TA of Deveci variety significantly increased from 0,22 g/100 g to 0,28 g/100 g. Zinc application significantly (P<0,05) reduced the total phenolics of Akca and Deveci varieties. Similarly, the zinc application significantly (P<0,01) reduced the total antioxidant activity of Akca variety according to the radical scavenging ...

Effects of methyl jasmonate on quality properties and phytochemical compounds of kiwifruit (Actinidia deliciosa cv. ‘Hayward’) during cold storage and shelf life

Introduction Kiwifruit with a unique taste, flavor, and aroma is quite rich in dietary fiber, ant... more Introduction Kiwifruit with a unique taste, flavor, and aroma is quite rich in dietary fiber, antioxidants, minerals, vitamin C, and phenolic compounds. It is mostly used in treatment of gastrointestinal disorders. Parallel to increasing consumptions, world kiwifruit production has also been continuously increasing every day (Huang, 2016; Ozturk et al., 2019a). Since the kiwifruits are not at sufficient ripeness for consumption at harvest time and are easily perishable, cold storage is an essential process in kiwifruit trade in order to prevent product buildup in markets and to regulate the supply chain. However, quality losses throughout cold storage and shelf life, especially flesh softening, cause significant economic losses for both the producers and traders. Therefore, recent researches mostly focused on ethyleneinhibiting practices, including aminoethoxyvinylglycine and 1-methylcyclopropene, salicylic acid, putrescine treatments, and modified atmosphere packaging (

Determination of Fruit Quality Properties of Loquat Genotypes Grown In Ordu Province of Turkey

International Journal of Scientific and Technological Research, 2018

This study was conducted to determine the quality attributes of loquat fruit grown in Ordu provin... more This study was conducted to determine the quality attributes of loquat fruit grown in Ordu province of Turkey, in 2015. In the study, fruit weight, fruit sizes, color characteristics, seed and flesh weight, fruit firmness, pH, SSC and titratable acidity were investigated. The highest (35.52 g and 41.91 mm) and lowest (16.02 g and 31.13 mm) values in terms of fruit weight and fruit length were obtained from Ordu-1 and Ordu- 17 genotypes, respectively. The highest fruit width (41.05 mm) and fruit thickness (39.33 mm) were measured from Ordu-12 genotype. The b * value of the fruit ranged from 46.28 (Ordu-3) to 53.79 (Ordu-8). The seed number ranged from 1.40 (Ordu-24) to 4.80 (Ordu-19). The highest flesh weight (29.04 g) was measured from Ordu-1 genotype. The flesh weight/seed weight ratio varied from 5.04 (Ordu-25) to 2.70 (Ordu-14). Compared the other genotypes, Ordu-1 genotype was higher firmness values than other genotypes. Both the highest SSC value (14.50%) and the lowest acidity...

EffEct of AVG trEAtmEnts on somE physico-mEchAnicAl propErtiEs And color chArActEristics of ApplE ( Malus doMestica Borkh . )

Ozturk, B., E. AltuntAs, Y. OzkAn and k. Yildiz, 2012. Effect of AVG treatments on some physico ... more Ozturk, B., E. AltuntAs, Y. OzkAn and k. Yildiz, 2012. Effect of AVG treatments on some physico mechanical properties and color characteristics of apple (Malus domestica Borkh.). Bulg. J. Agric. Sci., 18: 889897 the purpose of this study was to determine the effect of AVG treatments on some physicomechanical properties and color characteristics of apple. three levels of AVG as AVG0 (0 mg l1, nontreatment), AVG1 (100 mg l1) and AVG2 (300 mg l1) were used. the geometric mean diameter, fruit mass, bulk density increased from 69.03 mm to 70.40 mm, from 186.8 g to 191.0 g, and from 352.5 to 374.3 kg m3, whereas, the sphericity of apple decreased from 1.087 to 1.078 as AVG doses in creased, respectively. the surface area, projected area and volume increased with AVG doses. L* value increased from 43.75 to 45.88, whereas, chroma decreased from 40.07 to 39.68 as AVG doses increased from 0 to 300 mg l1, respectively. the static coefficients of friction on rubber and galvanized m...

‘Deveci’ Armudunun Şeker ve Organik Asit İçeriği Üzerine Anaçların Etkileri

Bu calismanin amaci 2011-2015 yillari arasinda ‘Deveci’ armudunun ( Pyrus communis L.) seker ve... more Bu calismanin amaci 2011-2015 yillari arasinda ‘Deveci’ armudunun ( Pyrus communis L.) seker ve organik asit icerigi uzerine 3 farkli anacin [BA 29 ve EMC ( Cydonia oblonga ) ayva ve armut coguru ( P. communis) ] etkilerini belirlemektir. Arastirmada anaclar bakimindan meyve orneklerinde organik asit olarak; okzalik asit, tartaric asit, malik asit, askorbik asit, asetik asit, sitrik asit, fumarik asit ve propiyonik asit, sekerler olarak ta; fruktoz, sukroz, glikoz ve toplam seker incelenmistir. ‘Deveci’ armudunda malik, askorbik ve propiyonik asit baskin organik asitler olarak belirlenmistir. Malik ve askorbik asit icerigi BA 29 anacindan elde edilen meyvelerde, EMC ve cogur anacindan daha yuksek bulunurken propiyonik asit icerigi cogurde daha yuksek bulunmustur. Malik asit icerigi BA 29 anacinda en yuksek (3425.3 mg 100 g -1 ), cogur de ise en dusuk (2976.5 mg 100 g -1 ) miktarda bulunmustur. Tartarik, askorbik, asetik, sitrik ve fumarik asit bakimindan anaclar arasinda onemli fa...

Change of Fruit Quality Properties of Jujube Fruit (Ziziphus Jujuba) without Stalk and with Stalk during Cold Storage

This study was conducted to determine the change of fruit quality properties of jujube fruit (Ziz... more This study was conducted to determine the change of fruit quality properties of jujube fruit (Ziziphus jujuba) without stalk and with the stalk during storage. The fruit without and with stalk were stored at 0 ± 0.5°C and 90 ± 5% RH during 45 days. Also, fruit were placed inside modified atmosphere packing (MAP). The presence of the stalk of the fruit was effective in reducing quality losses in storage. The weight loss, decay ratio and vitamin C loss of fruit that were stored without stalk were higher. There was no change in soluble solids content and acidity ratio depending on fruit stalk presence. Total phenolic, total flavonoid, and antioxidant activity values were lower in fruit without stalk at the end of the storage. With the MAP application, the weight loss and decay rate of the fruit decreased in storage. In addition, fruit firmness, acidity, and vitamin C losses were lower in MAP-treated fruit. At the end of the storage, total phenolic, total flavonoid, and antioxidant acti...

The effects of pre-harvest napthalene acetic acid and aminoethoxyvinylglycine treatments on storage performance of 'Ak Sakı' apple cultivar grown in Erzincan conditions

This study was carried out to determine the effects of pre-harvest aminoethoxyvinylglycine (AVG, ... more This study was carried out to determine the effects of pre-harvest aminoethoxyvinylglycine (AVG, 150, 225 ve 300 mg/L) and naphthaleneacetic acid (NAA, 20 mg/L) treatments in different doses on storage performance of ‘Ak Sakı’ apple cultivar (Malus domestica Borkh.) in 2012. The changes on some fruit quality parameters were measured at 2±1 o C temperature and with 90±5 % relative humidity at 45 days interval during storage. The lowest weight loss was obtained from 300 mg/L AVG treated fruits during the storage. In the all analysis date, the highest L* value was obtained from 300 mg/L AVG treated fruits, and the lowest hue angle value was reported from the fruits of control treatment. The flesh firmness was determined that the best kept in the 225 and 300 mg/L AVG treated fruits during the storage. The flesh firmness significantly reduced with NAA treatment at the end of storage. The highest soluble solids concentration (SSC) was obtain from control fruit during the storage, whereas ...

Effect of plant growth regulators on fruit quality and biochemical content of '0900 Ziraat' sweet cherry cultivar

Journal of Tekirdag Agricultural Faculty, 2013

ABSTRACT This study was carried out in Tokat ecological conditions to determine the effect of met... more ABSTRACT This study was carried out in Tokat ecological conditions to determine the effect of methyl jasmonate (MeJA) and aminoethoxyvinylglicine (AVG), applied 3 weeks before anticipated harvest date, on fruit quality and biochemical content of ‘0900 Ziraat’ sweet cherry (Prunus avium L.) grafted on Gisela 5 rootstock. In the study 100 and 200 mg L-1 AVG doses, and 2240 mg L-1 MeJA dose were used. Compared to control treatment, the fruit weight significantly increased with 100 mg L-1 AVG and MeJA treatment. Geometric diameter significantly increased with only MeJA treatment, whereas, flesh firmness significantly decreased with only MeJA treatment. The flesh / stone ratio increased with 100 mg L-1 AVG and MeJA treatment. L* and hue angle with 200 mg L-1 L AVG, chroma value with 100 mg L-1 AVG, and a* value with both AVG treatment significantly increased. The soluble solids concentration and pH value significantly decreased with MeJA treatment, whereas, the titratable acidity increased with MeJA. Total phenolic compounds and total anthocyanin significantly decreased with 100 mg L-1 AVG and MeJA treatment. The total antioxidant capacity significantly decreased with only MeJA treatment.

The Efficacy of Aminoethoxyvinylglycine (ReTain) For Improving Fruit Set on ‘0900 Ziraat’ Sweet Cherry

A study was carried out to determine the effect on fruit set and fruit quality of different rates... more A study was carried out to determine the effect on fruit set and fruit quality of different rates of applications [control (0 mg L-1), 250, 500 and 750 mg L-1] of AVG applied to ‘0900 Ziraat’ sweet cherry variety grafted on MaxMa 14 rootstock. Compared to the control, it was determined that fruit set on the trees applied with AVG increased from 97.5% to 130.4%. While the soluble solids content was significantly decreased, significant differences in fruit quality (fruit weight, fruit sizes, flesh firmness, titratable acidity, ripening index and color characteristics) were not observed between control and AVG treatments. There was significant difference between AVG rates with regard to soluble solids content. The lowest SSC value was obtained from the 500 mg L1 AVG treatment

Maturity Stages and MAP Affect the Quality Attributes and Bioactive Compounds of Cornelian Cherry Fruit (Cornus mas L.) During Cold Storage

Erwerbs-obstbau, 2021

The present research was conducted to investigate the influence of the harvest maturity stages an... more The present research was conducted to investigate the influence of the harvest maturity stages and modified atmosphere packaging (MAP) on quality of cornelian cherry fruit. The cornelian cherry fruit (Cornus mas L.) were used as the plant materials in this study. Weight loss of MAP-treated fruit was lower than the untreated. At harvest and end of the storage, the greatest respiration and ethylene production rates were measured from M‑1. MAP-treated fruit were maintained firmness and had lower decay. At the end of the storage, the greatest soluble solids and acidity were obtained from M‑2. Also, vitamin C contents of M‑1+MAP were greater than M‑1, M‑2 and M‑2+MAP. At harvest and on 15th, 30th and 45th day of the storage, anthocyanin of M‑2 was greater than M‑1. At the last two periods of the storage, flavonoid contents of MAP-treated fruit were greater than the untreated. During the storage, M‑2+MAP had greater phenolic contents than the other. The greatest antioxidant activity at th...

The Influence of the Rootstocks on Biochemical and Bioactive Compound Content of ‘0900 Ziraat’ Sweet Cherry Fruit

Erwerbs-Obstbau

The study was conducted to determine the effects of different rootstocks (Ma × Ma 14, GiselA 5, G... more The study was conducted to determine the effects of different rootstocks (Ma × Ma 14, GiselA 5, GiselA 6 and SL 64) on quality properties and bioactive compounds of ‘0900 Ziraat’ sweet cherry fruit. Fruit weight, thickness and length of Ma × Ma 14 and SL 64 was higher than the GiselA 5 and GiselA 6. Firmness of GiselA 6 was lower than the other rootstocks (Ma × Ma 14, GiselA 5 and SL 64). The chroma value of GiselA 5 was greater than the other rootstocks, whereas the hue angle of SL 64 was lower than the other rootstocks. While the lowest SSC and acidity was obtained in GiselA 5, the highest vitamin C was determined in Ma × Ma 14. Total phenolics and total flavonoids, thus antioxidant activity of GiselA 6 and SL 64 rootstocks was higher than Ma × Ma 14 and GiselA 5 rootstocks. Catechin was the major phenolic acid in ‘0900 Ziraat’ sweet cherry fruit. GiselA 6 had higher catechin and 4‑hydroxybenzoic acid content than the other rootstocks. As a result, it was revealed that sweet cherry rootstocks were effective on bioactive compounds and fruit quality characteristics.

Fresh-cut fruits and vegetables: Quality issues and safety concerns

Fresh-Cut Fruits and Vegetables

DETERMINING OF THE FRUIT CHARACTERISTICS OF PISTACHIO GRAFTED ON WILD Pistacia terebinthus L. UNDER THE CENTRAL KELKIT BASIN/TURKEY ECOLOGICAL CONDITIONS

Acta Scientiarum Polonorum Hortorum Cultus

The study was carried out to determine fruit quality characteristics in „Uzun” pistachio cultivar... more The study was carried out to determine fruit quality characteristics in „Uzun” pistachio cultivar grafted on terebinth rootstock (P. terebinthus L.) in Suşehri under Central Kelkit Basin/Turkey ecological conditions in 2017. In the study, it was determined that the ratio of the split fruit was 80%; the blank fruit ratio was 8%; nut weight was 0.93 g; kernel weight was 0.50 g and kernel ratio was 53.8%. As a result of analyses, it was assessed that the fruit consists of 19.39% protein, 3.74% moisture, 2.38% ash, 53.30% fat, 7182.45 mg/kg potassium, 4046.79 mg/kg phosphorus, 1592.96 mg/kg calcium, 974.35 mg/kg magnesium, 16.14 mg/kg iron, 4.42 mg/kg manganese, 11.38 mg/kg copper and 27.05 mg/kg zinc. It was determined that the total phenolic content was 1989.8 mg GAE kg–1 dw, the total flavonoid content was 363.0 mg QE kg–1 dw; DPPH was 30.9 mmol TE kg–1 dw; FRAP was 36.2 mmol TE kg–1 dw.

Effects of preharvest GA3, CaCl2 and modified atmosphere packaging treatments on specific phenolic compounds of sweet cherry

Turkish Journal of Food and Agriculture Sciences

The fruit of sweet cherry are more sensitive against external factors than many fruit species so ... more The fruit of sweet cherry are more sensitive against external factors than many fruit species so post harvest quality loss on sweet cherry is quite higher. For this reason, it is very significant to reduce the postharvest losses and to extend the storage period in sweet cherry, and this is one of the main objectives for producers and consumers. The aim of the study was to determine the effects of GA3, CaCl2 and modified atmosphere packaging (MAP) applications on individual phenolics compounds in postharvest storage on sweet cherry. In the study, GA3 was applied at 30 mg L-1 concentration when fruit skin was yellow-straw, and CaCl2 was applied at 0.5% concentration 20 and 10 days before the estimated harvest date. The study consisted of 4 different spray (Control (water only), GA3, CaCl2, GA3+ CaCl2) and 2 packaging aplications (without and with MAP). MAP was applied to the fruit after the harvest. In our study, individual phenolics such as catechin, 4-hydroxybenzoic acid, epicatechin, caffeic acid, p-coumaric acid, 4-aminobenzoic acid and protocatechuic acid were determined. It has been determined that pre-harvested GA3, and CaCl2 applications have increased the content of individual phenolics in fruit. The concentration of individual phenolics generally decreased with increasing cold storage time, whereas epicatechin and 4-hydroxybenzoic acid concentrations increased. 4-hydroxybenzoic acid and caffeic acid concentrations were higher CaCl2, and GA3 treatments than in control in all measured period. The MAP application had a positive effect on the losses of other phenolic compounds except catechin during cold storage.

BIOACTIVE COMPOUNDS AND PHYSICO-MECHANICAL ATTRIBUTES OF FRUIT AND STONE OF CHERRY LAUREL (Prunus laurocerasus) HARVESTED AT DIFFERENT MATURITY STAGES

Acta Scientiarum Polonorum Hortorum Cultus

In the study, physico-mechanical properties [geometric mean diameter (D g), sphericity, surface a... more In the study, physico-mechanical properties [geometric mean diameter (D g), sphericity, surface area, weight (W), bulk and fruit density, color, fruit removal force (FRF), puncture and compression force, puncture and compression deformation, friction coefficient] and biochemical attributes [pH, soluble solids content (SSC), titratable acidity (TA), vitamin C, total phenolics (TPs), total monomeric anthocyanin (TMA) and total antioxidant capacity (TAC)] of cherry laurel fruits (Prunus laurocerasus) and stones were investigated. Geometric mean diameter, surface area, fruit weight, bulk and fruit density significantly increased, but L*, a* and b* values significantly decreased with the progress of ripening. Fruit removal force decreased from 5.04 N to 3.09 N. On the other hand, W/FRF increased with the progress of harvest date. Static friction coefficient of fruits significantly increased over plywood and silicone surfaces and friction coefficients of stones increased over plywood, galvanized mild steel and silicone surfaces with the progress of harvest date. The pH, SSC, vitamin C, TPs, TMA and TAC (according to FRAP and TEAC assay) values significantly increased with the progress of ripening. It was concluded that fruit maturity stage at harvest had significant impact on physico-mechanical attributes and bioactive compounds of cherry laurel fruits.

Piraziz elmasının soğukta muhafaza ve raf ömrü üzerine avg ve aloevera uygulamalarının etkisi

Akademik Ziraat Dergisi

This research was conducted to determine the effects of post-harvest Aloe vera and pre-harvest AV... more This research was conducted to determine the effects of post-harvest Aloe vera and pre-harvest AVG treatments on cold storage and shelf life of Piraziz apple. The study was investigated fruit quality characteristics as weight loss, colour characteristics (L*, chroma and hue angle), fruit flesh firmness, soluble solids content (SSC), titratable acidity (TA), pH and starch degradation during cold storage and shelf life. Weight loss was significantly delayed in AVG-treated fruits during cold storage. Fruit flesh firmness significantly reduced with all treatments during cold storage and shelf life. Soluble solids content increased until 60 th day of cold storage and shelf life for all treatments, and then decreased. TA value decreased during cold storage and shelf life for all treatments. Starch degradation occurred in all treatments during cold storage and shelf life and AVG treatment retarded. Conclusion, AVG can be used as a tool to maintain fruit quality for a longer time.