Journal of the American Society for Horticultural Science. American Society for Horticultural Science
The S-genotypes of a set of Turkish and Hungarian apricot (Prunus armeniaca L.) cultivars were de... more The S-genotypes of a set of Turkish and Hungarian apricot (Prunus armeniaca L.) cultivars were determined by polymerase chain reaction (PCR) amplification of their S-RNase intron regions. In addition, the S-genotyping method was extended to the SFB gene to detect the non-functional S C -haplotype and hence reliably identify self-compatible apricot cultivars. We determined the complete S-genotype of 51 cultivars and the partial S-genotype of four cultivars. A total of 32 different S-genotypes were assigned to the 51 cultivars, and many of them (28) were classified into newly established cross-incompatibility groups III through XIV. Another 12 cultivars demonstrated unique incompatible genotypes and seven self-compatible cultivars were identified in the examined accessions. The fact that Turkish and Hungarian apricot cultivars carry 12 and five S-alleles, respectively, and all five alleles detected in Hungarian cultivars were also present in Turkish apricots furnished molecular evidence supporting the long-suspected historical connection between Hungarian and Turkish apricots. The connection between these two gene pools appeared to be relatively recent and associated with historical events dating back 300 years. Our results confirm that Turkish germplasm contributed considerably to the development of several desirable Hungarian apricot cultivars. Results suggest that the mutation rendering the S C -haplotype non-functional might have occurred somewhere east of central Turkey.
HortScience: a publication of the American Society for Horticultural Science
Fruits of four berry species (strawberry, raspberry, red and black currants) were compared in the... more Fruits of four berry species (strawberry, raspberry, red and black currants) were compared in their elemental composition (Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, Na, P, and Zn) and redox parameters involving total phenol content (TPC), ferric reducing ability (FRAP), 2,2'-diphenyl-1-...
our reiearch Was canied out to determine tbe antiaxidant capaeÍty, tota| Dhenolics content and nu... more our reiearch Was canied out to determine tbe antiaxidant capaeÍty, tota| Dhenolics content and nutient element contents in the fruits of tig (Ficus eaica L ) 'oroum in Hunqary as well as in dried fruits conmercially available in the Hungaian 'mafuet h nÉ siudy, the possibilry of fig cuftivation Was investÍgated. The climate chanainq of the carpathian Basin may favour an íncrease in the cultivation of this soecÉs-a// around this reqion our resu/Ís sl,ow that fig fruits are naturally ich iources of minerats pafticilarty as concems elemeűts K, Mg, Ca, Na, anc P' ln addition, We faund a high anthxidant capacity, especially in died figs. Thís might be due to a relatively géntle way ol processing by pÍeseNing the heat sensitjve compounds and a resuftant incrcase in lhe dry mass, Our study demanstrated that fig ;ight be considered as a perspective fruit With putative applicati()n under specÍal diet re]uirements by ptoúding high anaunts of polyphenols and nutrient elenents'
The antioxidant effects, the levels of total phenol and the total phenol contents of volatile oil... more The antioxidant effects, the levels of total phenol and the total phenol contents of volatile oils and plant extracts were determined in eight various Rosemary (Rosmarinus officinalis L.) clones. Antioxidant acitvities and the total phenol contents were measured by spectophotometric method as well as the volatile oil content of the fresh plants with gas chromatograph. Our preliminary results clearly indicate
... Boković, R., H. Duval, M. Rovira, KR Tobutt, M. Romero, F. Dicenta, and I. Batlle, 1998 ... ... more ... Boković, R., H. Duval, M. Rovira, KR Tobutt, M. Romero, F. Dicenta, and I. Batlle, 1998 ... Agr. 19, 310. Halász, J., A. Pedryc, and A. Hegedűs, 2007: Origin and dissemination of the pollen-part mutated S C -haplotype that confers self-compatibility in apricot (Prunus armeniaca). ...
The fruit quality parameters and antioxidant capacity (ferric reducing antioxidant power, FRAP) a... more The fruit quality parameters and antioxidant capacity (ferric reducing antioxidant power, FRAP) and total phenolic content (TPC) were determined in 27 apricot cultivars and hybrids of diverse origins. Twenty one-to 35-fold variations were measured among FRAP and TPC values. Besides genotype, harvest year also contributed significantly (P ≤ 0.05) to the variations of TPC presumably due to the climatic differences between years. A subset of genotypes (15) was also analyzed for their antiradical activities (2,2 -diphenyl-1-picrylhydrazyl, DPPH; total radical-scavenging activity, TRSA; water-soluble antioxidant capacity, ACW; and lipid-soluble antioxidant capacity, ACL), and vitamin C contents as well as color indices (CIE H • , L * , and chroma). The hybrid "Preventa" had outstanding FRAP (>10.4 mmol ascorbic acid/L), DPPH (74.45%), TRSA (0.002%), ACW (33587.5 nmol AA/L) and ACL (78.65 nmol Trolox/L), TPC (>2890.0 mg gallic acid/L), and vitamin C (16.17 mg/100 g FW) levels and an average carotenoid content estimated from the hue angle (66.99 • ). Most antioxidant and antiradical activities correlated significantly except for TRSA; the closest correlation was observed between FRAP and ACW (r = 0.952). Only TRSA showed significant correlations with color indices, H • and chroma, suggesting TRSA measures at least a fraction of the antioxidant capacity attributable to apricot carotenoids.
Total phenolic content (TP) and total antioxidant capacity (AC) were analysed in shoots of Phyllo... more Total phenolic content (TP) and total antioxidant capacity (AC) were analysed in shoots of Phyllostachys aureosulcata (PA), P aureosulcata f. aureocaulis (PAA), P. aureosulcata f. spectabilis (PAS), P. bissetii (PB), P. flexuosa (PF), P. humilis (PH), P. iridescens (PI), P. nigra var. nigra (PNN), P. nigra var. henonis (PNH), P. mannii (PM), P. sulphurea var. sulphurea (PSS), P. violascens (PVI), P. viridiglaucescens (PVG), P. vivax f. aureocaulis (PVA), collected on four harvest dates. Both TP and AC were determined following three processing methods, fresh, boiled and pickled in shoots of PF. Comparative study of TP and AC in the above Phyllostachys species shoots has not been reported before. The highest TP (1,227.6 μg GA/ml) and AC (154.0 μg AA/ml) values were measured in fresh shoots and the lowest in pickled ones. The highest values of TP were measured in the case of PA (1,321.95 μg GA/ml). The other taxa followed in decreasing order: PF, PVI, PI, PAA, PB, PAS, PNN, PNH, PM, P...
HortScience: a publication of the American Society for Horticultural Science
... The country is also very rich in endemic plant species (Atik et al., 2010). ... group of pigm... more ... The country is also very rich in endemic plant species (Atik et al., 2010). ... group of pigments naturally accumulating in large quantities and are known for their structural diversity and various functions including the brilliant red, orange, and yellow colors of edible fruits (Socaciu ...
In this study, some biochemical properties (total soluble solid content, pH, acidity, antioxidant... more In this study, some biochemical properties (total soluble solid content, pH, acidity, antioxidant activity) and contents of biological compounds (vitamin C, total phenolics, total ellagic acid and concentration of anthocyanins) of fifteen wild strawberry accessions (Fragaria vesca L.) and one commercial strawberry cultivar Camarosa (Fragaria × ananassa Duch.) sampled in Northeastern Turkey were determined. Antioxidant activity of fruit samples was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl) and FRAP (Ferric reducing antioxidant power) assays. Notable differences were found both among wild strawberries (Fragaria vesca) and also between wild strawberries and cv. Camarosa (Fragaria x ananassa). Among the strawberry accessions tested, the total phenolics ranged from 138 mg to 228 mg gallic acid equivalent per 100 g fresh fruit. The total monomeric anthocyanin content was the highest in wild accession FV-2 (53.51 mg/100 g) while the lowest in FV-6 as 25.11 mg per 100 g fresh weigh...
Magyarországon termesztett 6 bogyós gyümölcsfaj 17 jelentősebb fajtája gyümölcseinek antioxidáns ... more Magyarországon termesztett 6 bogyós gyümölcsfaj 17 jelentősebb fajtája gyümölcseinek antioxidáns kapacitását, és az azzal összefüggésbe hozható beltartalmi értékeit elemeztük a kutatási időszak alatt. A kutatási eredmények bizonyították, hogy a Kárpát medence ökológiai adottságai között termesztett bogyósgyümölcsök gazdag beltartalmi értékekkel és jelentős antioxidáns kapacitással rendelkeznek. A vizsgált szamóca, málna, szeder, piros és fekete ribiszke fajták gyümölcseiben a táplálkozásbiológiailag fontos összetevők mennyisége és azok aránya számottevő eltérést mutat. A bogyósgyümölcsök beltartalmi értékeit és antioxidáns anyagait döntő mértékben a fajták genetikai adottságai határozzák meg, azokat a termőhelyi körülmények csak kisebb mértékben befolyásolják. A vizsgált bogyósgyümölcsök antioxidáns kapacitása a fajták átlagos értékei alapján csökkenő sorrendben a következőképpen alakul: fekete bodza, fekete ribiszke, szeder, piros ribiszke, málna és szamóca. A feketebodza antioxidá...
Sour cherry is one of the most famous and characteristic Hungarian fruit what is commonly used fo... more Sour cherry is one of the most famous and characteristic Hungarian fruit what is commonly used for in food production as colour additive. Valuable compounds in fruit juice –vitamins, polyphyenols, etc.-are heat and mechanical sensitive molecules and during the concentrate process should have to avoid from degradation. Osmotic distillation seems suitable option to product high quality of sour cherry juice because this process not requires high temperature or pressure. Raw juice with approximately 15°Brix was used for the experiment and tried to concentrate up to 60°Brix where the water activity enough low to inhibit the microbiological effects. Before and after the process TPC (total phenolic compounds) and AC (antioxidant capacity) was measured by spectrophotometric method to determine the effect of the osmotic distillation. Results point out that osmotic distillation is a promising method to make concentrated sour cherry juice while the valuable compounds could avoid the degradation.
ABSTRACT Overwhelming evidence from epidemiological, in vivo, in vitro, and clinical trial data i... more ABSTRACT Overwhelming evidence from epidemiological, in vivo, in vitro, and clinical trial data indicates that a plant-based diet can reduce the risk of chronic diseases, particularly cancer. Some important physicochemical characteristics, bioactive content and antioxidant capacity of fruits of seven commercially grown loquat (Eriobotrya japonica (Thunb.) Lindl.) cultivars (‘Akko XIII’, ‘Champagne de Grasse’, ‘Guzelyurt 6’, ‘Hafif Cukurgobek’, ‘KKTC 3’, ‘KKTC 4’ and ‘Sayda’) harvested from Antalya province in Turkey were investigated. The results indicated cultivar-specific differences for most of the physicochemical characteristics, bioactive content and antioxidant capacity tested. Fruit mass and fruit flesh ratio ranged from 33.18 g (‘Champagne de Grasse’) to 61.38 g (‘KKTC 3’) and 80.44% (‘Akko XIII’) to 86.29% (‘KKTC 3’). Total phenolic content varied from 140 (‘Guzelyurt 6’) to 253 μg GAE per g (‘Akko XIII’). The cultivar ‘Champagne de Grasse’ had the highest soluble solids content (14.58%). The highest total antioxidant capacity was observed in fruits of ‘Akko XIII’ with all three antioxidant-determining methods. There were close positive correlations between antioxidant capacity and total phenolic content in loquat fruits. Results show that the loquat represents a good source of biofunctional phytochemicals because of their high phenolic, carotenoid and antioxidant contents.
Plant science : an international journal of experimental plant biology, 2001
Cadmium(Cd) stress induced alterations in the activities of several representatives of the enzyma... more Cadmium(Cd) stress induced alterations in the activities of several representatives of the enzymatic antioxidant defense system such as guiacol peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) were comparatively studied in green and greening barley seedlings that represent two different stages of plant development. Although roots were the main site of Cd accumulation, 1.5-3% of Cd was translocated into leaves and it induced oxidative damage which was indicated by the reduced chlorophyll and increased malondialdehyde content of the leaves. In roots of both types of seedlings exposed to various Cd concentrations, the APX activity was enhanced without any increase in the activity of POD. In leaves, however, elevated activities of both POD and APX could be observed. In roots of green seedlings at high concentration of Cd, the APX activity was reduced on the fourth day of culture but no inhibition was found in the POD activity. Leaf CAT which mainly represented the peroxis...
ABSTRACT The effect of Cd on chlorophyll (Chl) as well as on light-harvesting complex II (LHCII) ... more ABSTRACT The effect of Cd on chlorophyll (Chl) as well as on light-harvesting complex II (LHCII) accumulation, has been examined during the early stages of development in etiolated Phaseolus vulgaris leaves exposed to intermittent light-dark cycles. We found that at the Cd concentrations studied, both Chl and LHCII accumulation were drastically reduced, although the LDS-solubilized total leaf protein level remained unaffected. However, on the basis of total chlorophyll present, the amount of stabilized LHCII was similar in both Cd-treated and nontreated samples. Additionally, the thylakoid-bound protease known to degrade LHCII, was found to be inhibited by Cd treatment both in vivo and in vitro. Finally, Northern hybridization analysis indicated that Cd affects LHCII accumulation by reducing drastically the steadystate level of Lhcb transcripts
Wheat seedlings were grown hydroponically, for the heavy metal treatment 200 μM Cd acetate was ap... more Wheat seedlings were grown hydroponically, for the heavy metal treatment 200 μM Cd acetate was applied. Nutrient solutions were also supplemented with a water-soluble zirconium ascorbate complex (Zr-ASC) at several concentrations. Our results indicated that wheat seedlings have accumulated great amounts of zirconium and cadmium in their roots and shoots. Zirconium uptake was increased under Cd stress; however, its translocation to the leaves was mitigated. Increased activities of guaiacol peroxidase (POD), ascorbic acid peroxidase (APX) and glutathione reductase (GR) reflected a Cd induced oxidative challenge in plant cells. Cadmium induced heavy metal stress symptoms could be alleviated by 10 and 33 μM Zr-ASC, which was also confirmed by the reduced activities of all the tested antioxidant enzymes. Acta Biol Szeged 49(1-2):93-94 (2005) KEY WORDS Zirconium Cadmium wheat oxidative stress peroxidases glutathione reductase
Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world w... more Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world with a high number of species, producing a fruit with numerous beneficial effects for human health. The aim of the study was to determine organic acid and sugar contents in the fruit of a number of hawthorn species grown in Erzincan province of Turkey.
The isoflavone genistein on the contrary to its well-established health-beneficial effects is not... more The isoflavone genistein on the contrary to its well-established health-beneficial effects is not a major component of the Western diet, since soy consumption, considered as the main dietary source of genistein, in these populations is low. Genistein compounds in twelve commercial sour cherry (Prunus cerasus L.) cultivars grown in Hungary were studied. High performance liquid chromatography coupled to electrospray ionisation quadrupole/time-of-flight mass spectrometry (HPLC-ESI-qToF-MS) was used for screening and confirmatory analyses. Genistin and genistein were found in 'Pipacs1', 'Kántorjánosi', 'Debreceni bőtermő' and 'Éva', which are native cultivars to Hungary. Genistein content of the latter three were in the range of 0.4-0.6, while in 'Pipacs1' in total 4.4 mg genistein compounds were measured expressed as aglycone equivalents per 100g of fresh fruit flesh. These cultivars may play important role as complementary genistein sources in the Western diet. Especially 'Pipacs 1', may be best utilised in functional food products.
Journal of the American Society for Horticultural Science. American Society for Horticultural Science
The S-genotypes of a set of Turkish and Hungarian apricot (Prunus armeniaca L.) cultivars were de... more The S-genotypes of a set of Turkish and Hungarian apricot (Prunus armeniaca L.) cultivars were determined by polymerase chain reaction (PCR) amplification of their S-RNase intron regions. In addition, the S-genotyping method was extended to the SFB gene to detect the non-functional S C -haplotype and hence reliably identify self-compatible apricot cultivars. We determined the complete S-genotype of 51 cultivars and the partial S-genotype of four cultivars. A total of 32 different S-genotypes were assigned to the 51 cultivars, and many of them (28) were classified into newly established cross-incompatibility groups III through XIV. Another 12 cultivars demonstrated unique incompatible genotypes and seven self-compatible cultivars were identified in the examined accessions. The fact that Turkish and Hungarian apricot cultivars carry 12 and five S-alleles, respectively, and all five alleles detected in Hungarian cultivars were also present in Turkish apricots furnished molecular evidence supporting the long-suspected historical connection between Hungarian and Turkish apricots. The connection between these two gene pools appeared to be relatively recent and associated with historical events dating back 300 years. Our results confirm that Turkish germplasm contributed considerably to the development of several desirable Hungarian apricot cultivars. Results suggest that the mutation rendering the S C -haplotype non-functional might have occurred somewhere east of central Turkey.
HortScience: a publication of the American Society for Horticultural Science
Fruits of four berry species (strawberry, raspberry, red and black currants) were compared in the... more Fruits of four berry species (strawberry, raspberry, red and black currants) were compared in their elemental composition (Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, Na, P, and Zn) and redox parameters involving total phenol content (TPC), ferric reducing ability (FRAP), 2,2'-diphenyl-1-...
our reiearch Was canied out to determine tbe antiaxidant capaeÍty, tota| Dhenolics content and nu... more our reiearch Was canied out to determine tbe antiaxidant capaeÍty, tota| Dhenolics content and nutient element contents in the fruits of tig (Ficus eaica L ) 'oroum in Hunqary as well as in dried fruits conmercially available in the Hungaian 'mafuet h nÉ siudy, the possibilry of fig cuftivation Was investÍgated. The climate chanainq of the carpathian Basin may favour an íncrease in the cultivation of this soecÉs-a// around this reqion our resu/Ís sl,ow that fig fruits are naturally ich iources of minerats pafticilarty as concems elemeűts K, Mg, Ca, Na, anc P' ln addition, We faund a high anthxidant capacity, especially in died figs. Thís might be due to a relatively géntle way ol processing by pÍeseNing the heat sensitjve compounds and a resuftant incrcase in lhe dry mass, Our study demanstrated that fig ;ight be considered as a perspective fruit With putative applicati()n under specÍal diet re]uirements by ptoúding high anaunts of polyphenols and nutrient elenents'
The antioxidant effects, the levels of total phenol and the total phenol contents of volatile oil... more The antioxidant effects, the levels of total phenol and the total phenol contents of volatile oils and plant extracts were determined in eight various Rosemary (Rosmarinus officinalis L.) clones. Antioxidant acitvities and the total phenol contents were measured by spectophotometric method as well as the volatile oil content of the fresh plants with gas chromatograph. Our preliminary results clearly indicate
... Boković, R., H. Duval, M. Rovira, KR Tobutt, M. Romero, F. Dicenta, and I. Batlle, 1998 ... ... more ... Boković, R., H. Duval, M. Rovira, KR Tobutt, M. Romero, F. Dicenta, and I. Batlle, 1998 ... Agr. 19, 310. Halász, J., A. Pedryc, and A. Hegedűs, 2007: Origin and dissemination of the pollen-part mutated S C -haplotype that confers self-compatibility in apricot (Prunus armeniaca). ...
The fruit quality parameters and antioxidant capacity (ferric reducing antioxidant power, FRAP) a... more The fruit quality parameters and antioxidant capacity (ferric reducing antioxidant power, FRAP) and total phenolic content (TPC) were determined in 27 apricot cultivars and hybrids of diverse origins. Twenty one-to 35-fold variations were measured among FRAP and TPC values. Besides genotype, harvest year also contributed significantly (P ≤ 0.05) to the variations of TPC presumably due to the climatic differences between years. A subset of genotypes (15) was also analyzed for their antiradical activities (2,2 -diphenyl-1-picrylhydrazyl, DPPH; total radical-scavenging activity, TRSA; water-soluble antioxidant capacity, ACW; and lipid-soluble antioxidant capacity, ACL), and vitamin C contents as well as color indices (CIE H • , L * , and chroma). The hybrid "Preventa" had outstanding FRAP (>10.4 mmol ascorbic acid/L), DPPH (74.45%), TRSA (0.002%), ACW (33587.5 nmol AA/L) and ACL (78.65 nmol Trolox/L), TPC (>2890.0 mg gallic acid/L), and vitamin C (16.17 mg/100 g FW) levels and an average carotenoid content estimated from the hue angle (66.99 • ). Most antioxidant and antiradical activities correlated significantly except for TRSA; the closest correlation was observed between FRAP and ACW (r = 0.952). Only TRSA showed significant correlations with color indices, H • and chroma, suggesting TRSA measures at least a fraction of the antioxidant capacity attributable to apricot carotenoids.
Total phenolic content (TP) and total antioxidant capacity (AC) were analysed in shoots of Phyllo... more Total phenolic content (TP) and total antioxidant capacity (AC) were analysed in shoots of Phyllostachys aureosulcata (PA), P aureosulcata f. aureocaulis (PAA), P. aureosulcata f. spectabilis (PAS), P. bissetii (PB), P. flexuosa (PF), P. humilis (PH), P. iridescens (PI), P. nigra var. nigra (PNN), P. nigra var. henonis (PNH), P. mannii (PM), P. sulphurea var. sulphurea (PSS), P. violascens (PVI), P. viridiglaucescens (PVG), P. vivax f. aureocaulis (PVA), collected on four harvest dates. Both TP and AC were determined following three processing methods, fresh, boiled and pickled in shoots of PF. Comparative study of TP and AC in the above Phyllostachys species shoots has not been reported before. The highest TP (1,227.6 μg GA/ml) and AC (154.0 μg AA/ml) values were measured in fresh shoots and the lowest in pickled ones. The highest values of TP were measured in the case of PA (1,321.95 μg GA/ml). The other taxa followed in decreasing order: PF, PVI, PI, PAA, PB, PAS, PNN, PNH, PM, P...
HortScience: a publication of the American Society for Horticultural Science
... The country is also very rich in endemic plant species (Atik et al., 2010). ... group of pigm... more ... The country is also very rich in endemic plant species (Atik et al., 2010). ... group of pigments naturally accumulating in large quantities and are known for their structural diversity and various functions including the brilliant red, orange, and yellow colors of edible fruits (Socaciu ...
In this study, some biochemical properties (total soluble solid content, pH, acidity, antioxidant... more In this study, some biochemical properties (total soluble solid content, pH, acidity, antioxidant activity) and contents of biological compounds (vitamin C, total phenolics, total ellagic acid and concentration of anthocyanins) of fifteen wild strawberry accessions (Fragaria vesca L.) and one commercial strawberry cultivar Camarosa (Fragaria × ananassa Duch.) sampled in Northeastern Turkey were determined. Antioxidant activity of fruit samples was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl) and FRAP (Ferric reducing antioxidant power) assays. Notable differences were found both among wild strawberries (Fragaria vesca) and also between wild strawberries and cv. Camarosa (Fragaria x ananassa). Among the strawberry accessions tested, the total phenolics ranged from 138 mg to 228 mg gallic acid equivalent per 100 g fresh fruit. The total monomeric anthocyanin content was the highest in wild accession FV-2 (53.51 mg/100 g) while the lowest in FV-6 as 25.11 mg per 100 g fresh weigh...
Magyarországon termesztett 6 bogyós gyümölcsfaj 17 jelentősebb fajtája gyümölcseinek antioxidáns ... more Magyarországon termesztett 6 bogyós gyümölcsfaj 17 jelentősebb fajtája gyümölcseinek antioxidáns kapacitását, és az azzal összefüggésbe hozható beltartalmi értékeit elemeztük a kutatási időszak alatt. A kutatási eredmények bizonyították, hogy a Kárpát medence ökológiai adottságai között termesztett bogyósgyümölcsök gazdag beltartalmi értékekkel és jelentős antioxidáns kapacitással rendelkeznek. A vizsgált szamóca, málna, szeder, piros és fekete ribiszke fajták gyümölcseiben a táplálkozásbiológiailag fontos összetevők mennyisége és azok aránya számottevő eltérést mutat. A bogyósgyümölcsök beltartalmi értékeit és antioxidáns anyagait döntő mértékben a fajták genetikai adottságai határozzák meg, azokat a termőhelyi körülmények csak kisebb mértékben befolyásolják. A vizsgált bogyósgyümölcsök antioxidáns kapacitása a fajták átlagos értékei alapján csökkenő sorrendben a következőképpen alakul: fekete bodza, fekete ribiszke, szeder, piros ribiszke, málna és szamóca. A feketebodza antioxidá...
Sour cherry is one of the most famous and characteristic Hungarian fruit what is commonly used fo... more Sour cherry is one of the most famous and characteristic Hungarian fruit what is commonly used for in food production as colour additive. Valuable compounds in fruit juice –vitamins, polyphyenols, etc.-are heat and mechanical sensitive molecules and during the concentrate process should have to avoid from degradation. Osmotic distillation seems suitable option to product high quality of sour cherry juice because this process not requires high temperature or pressure. Raw juice with approximately 15°Brix was used for the experiment and tried to concentrate up to 60°Brix where the water activity enough low to inhibit the microbiological effects. Before and after the process TPC (total phenolic compounds) and AC (antioxidant capacity) was measured by spectrophotometric method to determine the effect of the osmotic distillation. Results point out that osmotic distillation is a promising method to make concentrated sour cherry juice while the valuable compounds could avoid the degradation.
ABSTRACT Overwhelming evidence from epidemiological, in vivo, in vitro, and clinical trial data i... more ABSTRACT Overwhelming evidence from epidemiological, in vivo, in vitro, and clinical trial data indicates that a plant-based diet can reduce the risk of chronic diseases, particularly cancer. Some important physicochemical characteristics, bioactive content and antioxidant capacity of fruits of seven commercially grown loquat (Eriobotrya japonica (Thunb.) Lindl.) cultivars (‘Akko XIII’, ‘Champagne de Grasse’, ‘Guzelyurt 6’, ‘Hafif Cukurgobek’, ‘KKTC 3’, ‘KKTC 4’ and ‘Sayda’) harvested from Antalya province in Turkey were investigated. The results indicated cultivar-specific differences for most of the physicochemical characteristics, bioactive content and antioxidant capacity tested. Fruit mass and fruit flesh ratio ranged from 33.18 g (‘Champagne de Grasse’) to 61.38 g (‘KKTC 3’) and 80.44% (‘Akko XIII’) to 86.29% (‘KKTC 3’). Total phenolic content varied from 140 (‘Guzelyurt 6’) to 253 μg GAE per g (‘Akko XIII’). The cultivar ‘Champagne de Grasse’ had the highest soluble solids content (14.58%). The highest total antioxidant capacity was observed in fruits of ‘Akko XIII’ with all three antioxidant-determining methods. There were close positive correlations between antioxidant capacity and total phenolic content in loquat fruits. Results show that the loquat represents a good source of biofunctional phytochemicals because of their high phenolic, carotenoid and antioxidant contents.
Plant science : an international journal of experimental plant biology, 2001
Cadmium(Cd) stress induced alterations in the activities of several representatives of the enzyma... more Cadmium(Cd) stress induced alterations in the activities of several representatives of the enzymatic antioxidant defense system such as guiacol peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) were comparatively studied in green and greening barley seedlings that represent two different stages of plant development. Although roots were the main site of Cd accumulation, 1.5-3% of Cd was translocated into leaves and it induced oxidative damage which was indicated by the reduced chlorophyll and increased malondialdehyde content of the leaves. In roots of both types of seedlings exposed to various Cd concentrations, the APX activity was enhanced without any increase in the activity of POD. In leaves, however, elevated activities of both POD and APX could be observed. In roots of green seedlings at high concentration of Cd, the APX activity was reduced on the fourth day of culture but no inhibition was found in the POD activity. Leaf CAT which mainly represented the peroxis...
ABSTRACT The effect of Cd on chlorophyll (Chl) as well as on light-harvesting complex II (LHCII) ... more ABSTRACT The effect of Cd on chlorophyll (Chl) as well as on light-harvesting complex II (LHCII) accumulation, has been examined during the early stages of development in etiolated Phaseolus vulgaris leaves exposed to intermittent light-dark cycles. We found that at the Cd concentrations studied, both Chl and LHCII accumulation were drastically reduced, although the LDS-solubilized total leaf protein level remained unaffected. However, on the basis of total chlorophyll present, the amount of stabilized LHCII was similar in both Cd-treated and nontreated samples. Additionally, the thylakoid-bound protease known to degrade LHCII, was found to be inhibited by Cd treatment both in vivo and in vitro. Finally, Northern hybridization analysis indicated that Cd affects LHCII accumulation by reducing drastically the steadystate level of Lhcb transcripts
Wheat seedlings were grown hydroponically, for the heavy metal treatment 200 μM Cd acetate was ap... more Wheat seedlings were grown hydroponically, for the heavy metal treatment 200 μM Cd acetate was applied. Nutrient solutions were also supplemented with a water-soluble zirconium ascorbate complex (Zr-ASC) at several concentrations. Our results indicated that wheat seedlings have accumulated great amounts of zirconium and cadmium in their roots and shoots. Zirconium uptake was increased under Cd stress; however, its translocation to the leaves was mitigated. Increased activities of guaiacol peroxidase (POD), ascorbic acid peroxidase (APX) and glutathione reductase (GR) reflected a Cd induced oxidative challenge in plant cells. Cadmium induced heavy metal stress symptoms could be alleviated by 10 and 33 μM Zr-ASC, which was also confirmed by the reduced activities of all the tested antioxidant enzymes. Acta Biol Szeged 49(1-2):93-94 (2005) KEY WORDS Zirconium Cadmium wheat oxidative stress peroxidases glutathione reductase
Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world w... more Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world with a high number of species, producing a fruit with numerous beneficial effects for human health. The aim of the study was to determine organic acid and sugar contents in the fruit of a number of hawthorn species grown in Erzincan province of Turkey.
The isoflavone genistein on the contrary to its well-established health-beneficial effects is not... more The isoflavone genistein on the contrary to its well-established health-beneficial effects is not a major component of the Western diet, since soy consumption, considered as the main dietary source of genistein, in these populations is low. Genistein compounds in twelve commercial sour cherry (Prunus cerasus L.) cultivars grown in Hungary were studied. High performance liquid chromatography coupled to electrospray ionisation quadrupole/time-of-flight mass spectrometry (HPLC-ESI-qToF-MS) was used for screening and confirmatory analyses. Genistin and genistein were found in 'Pipacs1', 'Kántorjánosi', 'Debreceni bőtermő' and 'Éva', which are native cultivars to Hungary. Genistein content of the latter three were in the range of 0.4-0.6, while in 'Pipacs1' in total 4.4 mg genistein compounds were measured expressed as aglycone equivalents per 100g of fresh fruit flesh. These cultivars may play important role as complementary genistein sources in the Western diet. Especially 'Pipacs 1', may be best utilised in functional food products.
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Papers by Attila Hegedus