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3 2017, 3(2): 103-126 Back to browse issues page
Physiological responses and anti-oxidant enzymes activity of wheat different genotypes under drought stress condition
Abstract:   (2848 Views)

In order to study the drought stress of post-anthesis stage effect on agronomic characters and some of physiological traits in flag leaf and spike of different wheat genotypes, an experiment was carried out in factorial randomized complete block design with three replications. Two levels of irrigation: control (irrigation in all growth steps base on irrigated conditions) and drought stress (irrigation cut after anthesis stage until the end of growth period) as the first factor and different wheat genotypes (TEVEE'S'//CROW/VEE'S and Shark: sensitive, Manning/Sdv1/Dogu8 and Sabalan: semi tolerant, Sardari HR-86 and Dogu88/Ghafghaz7: tolerant) as the second factor were considered. Results showed the drought stress led to grain yield decrease through reducing thousand grain weights. Maximum grain yield was observed in the semi tolerant genotype Manning/Sdv1/Dogu8 and Shark genotype showed the minimum grain yield. Soluble protein content increased under stress condition. Maximum and minimum soluble protein content in flag leaf were observed in Sardari HR-86 and Shark genotypes, respectively and in spikes, the highest soluble protein content was observed in Manning/Sdv1/Dogu8 while the lowest observed in Shark. Catalase, peroxidase, ascorbate peroxidase and superoxide dismutase enzymes activity increased under the drought stress condition. The highest enzyme activity was observed in flag leaf of Sardari HR-86 the tolerant genotype and in spikes was observed in Manning/Sdv1/Dogu8 the semi tolerant genotype in the last step of sampling. In addition sensitive genotypes showed the lowest enzyme activity. It seemed that in Manning/Sdv1/Dogu8 genotype, defense system activating of catalase, peroxidase and superoxide dismutase enzymes had a key role in tolerance increase under the drought stress.

Keywords: Drought stress, Peroxidase, Yield, Wheat
Full-Text [PDF 8851 kb]   (1331 Downloads)    
Type of Study: Research | Subject: Ecophysiology
Received: 2017/05/29 | Accepted: 2017/05/29 | Published: 2017/05/29
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Physiological responses and anti-oxidant enzymes activity of wheat different genotypes under drought stress condition. 3. 2017; 3 (2) :103-126
URL: http://arpe.gonbad.ac.ir/article-1-222-en.html

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Volume 3, Issue 2 (3-2017) Back to browse issues page
تحقیقات کاربردی اکوفیزیولوژی گیاهی Applied Research of Plant Ecophysiology
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