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:: Volume 9, Issue 2 (2023) ::
pgr 2023, 9(2): 123-134 Back to browse issues page
Evaluation of Some Biochemical Traits and Expression of Two Genes from the MYB Family in Two Wheat Cultivars Under Drought Stress
Saeid Navabpour * , Horeyeh Najafi
Department of Plant Breeding and Biotechnology, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran , s.navabpour@gau.ac.ir
Abstract:   (2458 Views)
Environmental stress is one of the main factors that reduce the growth and performance of crops and threatening human food security. This study was conducted in order to investigate the effect of drought stress on the changes in biochemical traits and the level of expression of a MYB transcription factor gene in two wheat cultivars (Tajan and Zagros), under drought stress. The experiment was conducted as a factorial based on a completely randomized design with 3 replications. Drought treatments were applied at three levels of 40, 70 and 100% of field capacity 4 weeks after germination. Twenty days after the application of stress, leaves and roots were sampled in order to investigate the expression of MYB genes and measuring some biochemical traits. The results of examining the chlorophyll content under stress showed that the content of chlorophyll a and b decreased with increasing of stress intensity in different genotypes. The rate of reduction of chlorophyll a and b in Tajan genotype under severe stress was higher than Zagros genotype. Also, TBARM content under severe drought stress was significantly higher than moderate stress condition and this increase was seen in Tajen genotype more than Zagros genotype. qRT-PCR analysis showed that the MYB genes showed an increase in expression under drought stress. Furthermore, Zagros genotype, which is considered as a tolerant cultivar to drought stress, had a higher MYB expression level than Tajan cultivar for both genes, suggesting this cultivar for future breeding programs, also considering the importance MYB family genes during drought stress, the results can be used in molecular breeding and pyramiding breeding projects.
Keywords: Gene expression, Drought stress, Wheat, Biochemical traits
Full-Text [PDF 471 kb]   (563 Downloads)    
Type of Study: Research | Subject: Molecular genetics
Accepted: 2023/02/15
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Navabpour S, Najafi H. Evaluation of Some Biochemical Traits and Expression of Two Genes from the MYB Family in Two Wheat Cultivars Under Drought Stress. pgr 2023; 9 (2) :123-134
URL: http://pgr.lu.ac.ir/article-1-267-en.html


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Volume 9, Issue 2 (2023) Back to browse issues page
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