Papers by Armin Saed-Moucheshi
International Journal of Agronomy and Plant Production, 2013
ABSTRACT Most scientists make decisions based on analyzing of the obtained data from researches w... more ABSTRACT Most scientists make decisions based on analyzing of the obtained data from researches works. Almost all data in science are abundance and by themselves they are of little help unless they are summarized by some methods and appropriate interpretations have been made. The data set may contain so many observations that stand out and whose presence in the data cannot be justified by any simple explanation. Multivariate statistical technique is a form of statistics encompassing the simultaneous observations and analysis of more than one statistical variable. In this review we are trying to clarify how multivariate statistical methods such as multiple regression analysis, principal component analysis (PCA), factor analysis (FA), clustering analysis, and canonical correlation (CC) can be used as methods to explain relationships among different variables and making decisions for future works with examples relating to the agriculture and plant science.
Phyton-international Journal of Experimental Botany, 2023
Journal of Applied Biological Sciences, Feb 1, 2016
Screening plant genetic resources under water deficit environment using reliable selection criter... more Screening plant genetic resources under water deficit environment using reliable selection criteria is an essential step in breeding programs towards drought tolerance improvement. In this greenhouse experiment, the twenty-five barley (Hordeum vulgare L.) cultivars were subjected to well-watered and water deficit stress conditions in order to measure changes of antioxidant enzymes activities, malondialdehyde (MDA), proline and protein contents in response to water deficit stress and to evaluate the significance of the biochemical traits as selection criteria for improvement of grain yield. Significant variations were observed among the barley cultivars for grain yield as well as the biochemical traits including the antioxidant enzymes, MDA, protein and proline contents. Water deficit stress caused a significant increase in MDA, proline and protein contents as well as the antioxidant enzymes activities including catalase, peroxidase, superoxide dismutase and ascorbic peroxidase. The results of correlation coefficients and regression modeling showed that the relationships between grain yield and biochemical traits were somewhat influenced by water regimes. The results suggested that high proline content along with low protein content can be used as the criteria for selection of high-yield barley cultivars under well-watered conditions. Catalase and superoxide dismutase activities as well as proline content were known as the selection criteria with significant contributions to grain yield of barley under water deficit conditions. Catalase and superoxide dismutase activities were significantly positively related to grain yield, while proline content had a negative relationship with grain yield under water deficit conditions.
Molecular Biology Reports, Jun 28, 2022
Australian Journal of Crop Science, Feb 20, 2019
Effectiveness of selection of high-yield genotypes under drought stress environments can be impro... more Effectiveness of selection of high-yield genotypes under drought stress environments can be improved by using biochemical traits as indirect selection indicators. The objective of this study was to determine the extent to which biochemical traits are associated with triticale grain yield under normal irrigation and drought stress conditions. This field study was conducted to evaluate grain yield and various biochemical traits of 58 triticale genotypes during three consecutive growing seasons (2013-2016). Normal irrigation was applied when 40% of available soil water capacity was depleted. Drought stress was imposed by withholding irrigation for about 40 days from early heading stage to harvest time. In addition to grain yield, proline, malondialdehyde (MDH), hydrogen peroxide (H 2 O 2), protein content, carotenoid, chlorophyll a (Chl a), chlorophyll b (Chl b) and total chlorophyll along with antioxidant enzymes including superoxide dismutase (SOD), peroxidase (POD), ascorbic peroxidase (APX), and catalase (CAT) were measured. The contents of proline, H 2 O 2 , MDH and protein as well as activities of the antioxidant enzymes significantly increased in response to drought stress. Statistical analyses including correlation coefficients, principal component analysis (PCA), stepwise regression and path coefficients revealed that selection of triticale genotypes with low MDH, proline contents and SOD activity as well as high amounts of Chl a and total chlorophyll may improve grain yield under normal irrigation condition. PCA showed negative association between grain yield and antioxidant enzymes under drought stress condition. The results also suggested that low H 2 O 2 and malondialdehyde contents along with high activity of SOD were the selection indicators with significant contributions to triticale grain yield under drought stress condition.
Molecular Biology Reports, Oct 8, 2022
Scientific Reports, Mar 8, 2022
Hymenocrater longiflorus (surahalala) is a wild plant species with potential pharmaceutical and o... more Hymenocrater longiflorus (surahalala) is a wild plant species with potential pharmaceutical and ornamental interest. To date, the genomics of this plant is unknown and the gene expression profiling of the genes related to its metabolite has never been studied before. In order to study the responses of in vitro-grown surahalala plants to abiotic stresses and the differential expression of the genes related to its essential oils under exogenous proline application; three levels of PEG600 (0, 10, and 20%) and five levels of proline (0, 5, 10, 15, and 20 µm) were combined in the culture media. Thus, water deficit increased oxidants levels and decreased fresh weight of surahalala tissues, whereas addition of proline up to 15 µm was able to relatively compensate the negative effect of water deficit. Contrarily, high proline level (20 µm) had a negative effect on surahalala plants probably due to the stress simulation (nutrition) under high proline concentration. In addition, the best combination for achieving highest essential oils content was 10 µm proline plus 10% PEG. The expressional profiling of the genes TPS27, L3H, TPS2, TPS1, OMT and GDH3 were successfully carried out and their involvement in 1,8-cineole, carvone, α-pinene, thymol, estragole and β-Citronellol biosynthesis, respectively, was verified. In addition, our results indicated that these genes could also be involved in the synthesis of other metabolites under water deficit condition.
Journal of Plant Nutrition, Jun 18, 2014
ABSTRACT Environmental stresses present major challenges in our quest to achieve sustainable food... more ABSTRACT Environmental stresses present major challenges in our quest to achieve sustainable food production. The reactions of plants to environmental stresses are complex and involve many kinds of physiological and biochemical responses. Stress causes multifarious adverse effects in plants. Production of a family of reactive oxygen species (ROS) is a common phenomenon. When plants are subjected to environmental stress, the balance between the production of ROS and the quenching activity of antioxidants is upset, often resulting in an oxidative damage. Plants with high levels of antioxidant enzyme activity are reported to have greater resistance to this oxidative damage. The activities of component enzymes or the antioxidant levels are usually only double in response to many stress situations. This rather moderate response might be understood if we consider that the system is geared to self-destruction when it comes under threat. Understanding the mechanisms by which plants perceive environmental signals and transmit the signals to cellular machinery to activate adaptive responses is of fundamental importance to biology. The present review is focusing on ROS generation and plant defenses to them.
CRC Press eBooks, Jul 10, 2023
Journal of Plant Nutrition, Apr 28, 2022
Iran Agricultural Research, Feb 19, 2013
This study was conducted to evaluate changes in antioxidants, free proline, relative water conten... more This study was conducted to evaluate changes in antioxidants, free proline, relative water content and determination of root colonization of four commercial wheat (Triticum aestivum L.) cultivars (Azar2, Darab2, Shiraz, and Falat) inoculated with the fungus Glomus intraradices, under four water regimes of 100, 75, 50, and 25% of field capacity in the year 2010 at the School of Agriculture, Shiraz University. The means for leaf area, shoot fresh weight, root fresh weight, shoot dry weight and root/shoot ratio were 6.0, 10.2, 15.6, 25.2, and 10.31% respectively higher in the mycorrhizal as compared to non-mycorrhizal cultivars. Water deficit stress reduced root colonization percentage and the highest root colonization (28.10%) was observed in the cultivar Azar2. Compared to the non-mycorrhizal plants, inoculation increased the average values for relative water content, proline content, total chlorophyll content, total protein, superoxide dismutase, peroxidase, and catalase activities of mycorrhizal plants by 5.5, 35.6, 13.8, 21.6, 22.5, 22.7, and 15.5%, respectively. The highest peroxidase (9.77 U mg-1), catalase (9.82 U mg-1), and super oxide dismutase (19.80 U mg-1) activities were obtained by Azar2. The results indicated that inoculation with Glomus intraradices alleviated the deleterious effects of water deficit stress on wheat cultivars via proline accumulation and increased antioxidant activities. The cultivars Azar2 and Darab2 had higher values for most of the antioxidants and root colonization. Consequently, these cultivars could be used in wheat breeding programs for better symbiosis and drought tolerance.
International Journal of Agronomy and Plant Production, 2013
Eighteen bread wheat genotypes (Triticum aestivum L.) and two durum wheat genotypes (Triticum dur... more Eighteen bread wheat genotypes (Triticum aestivum L.) and two durum wheat genotypes (Triticum durum L.) were employed to compare susceptibility or tolerance under water deficit conditions. Two separated field experiments were carried out during 2009-2010 growing seasons at Research Farm,
Hortscience, Apr 1, 2018
The development of cultivars with broader climatic adaptation has recently become the objective o... more The development of cultivars with broader climatic adaptation has recently become the objective of most fruit breeding programmers. Regarding the importance of genetic control of cold hardiness as an influential characteristic for pomegranate and lacking studies in this area, the genetic control of cold hardiness in pomegranate using a partial mating scheme was studied. Five parents, including 'Rabab Post Ghermez Neyriz', 'Malas Yazdi', 'Poost Sefid Dezful', 'Malas Pishva Varamin', and 'Poost Nazok Torosh Abarkuh' with different cold hardiness capability were screened following a cold hardiness test in the laboratory and an evaluation of cold injury after natural freezing events in the field. The five screened cultivars were crossed in half-diallel crossing scheme with a total of 10 crosses in the Spring of 2014. Cold hardiness of the parent cultivars and the F 1 progenies were investigated using the electrolyte leakage (EL) method. Results showed that both general combining ability (GCA) and specific combining ability (SCA) were statistically significant. The hardiest parent ('Poost Nazok Torosh Abarkuh') showed the largest positive GCA effect (1560.59) for winter survival, suggesting that this parent is capable to produce tolerant offspring with high breeding values in crossing programs. The significant SCA in this study suggests that specific crosses should be targeted to produce highly capable offspring. Cross between 'Poost Nazok Torosh Abarkuh' and 'Malas Pishva Varamin' showed high value for SCA (1661.74), indicating capability for production of tolerant offspring to the cold condition. Furthermore, high broad-sense heritability (0.70) and moderate narrow-sense heritability (0.45) for cold hardiness indicate that a reasonable progress could be made in improvement of this trait through conventional breeding.
The success of plant breeding depends on diversity in plant genetic resources and their responses... more The success of plant breeding depends on diversity in plant genetic resources and their responses to changing environments. In this regard, twenty strawberry genotypes with altered genetic background were evaluated for their performance under different environments based on the estimation of their genetic variability and heritability. Furthermore, genetic distances and associations were assessed by using data mining techniques. The combined ANOVA results showed that environmental factors have great influences on changing the values’ size of the measured-traits. Also, high heritability and genetic variation were detected for yield and its components showed a high potential for improvement among the strawberry genotypes and being considered as raw materials in breeding programs. The biplot and heatmap, in line with clustering, showed to be key methods for finding about the structural association among genotypes, the measured-traits, and their cross relationships and their influences o...
Journal of Plant Nutrition, Jul 13, 2022
New Zealand Journal of Crop and Horticultural Science
Molecular Biology Reports
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Papers by Armin Saed-Moucheshi