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The physiological responses and antioxidant enzyme activity in bread wheat genotypes under post anthesis drought tension
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SH. Ardalani   , M. Saeidi , S. Jalali-Honarmand , M.E. Ghobadi , M. Abdoli * |
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Abstract: (5822 Views) |
| This experiment was conducted in order to investigate the effect of post anthesis drought tension on agronomical traits, biochemical characteristics and some physiological characteristics. The experiment was carried out in pot culture experiment as factorial experiment based on complete randomized blocks design in three replications in Campus of Agriculture and Natural Resources of Razi University, Kermanshah in 2011-12 cropping year. In this experiment, drought tension was considered at generative growth stage (from the anthesis stage until end of soil moisture growth stage, around 30 percent of field moisture) and different wheat genotypes consisted of Pishtaz, DN-11, Sivand and Marvdasht were investigated as the second factor. The results showed that drought tension after anthesis decreased grain yield by decreasing of 1000- grain weight. Under drought tension after anthesis, Marvdast and DN-11 genotypes had the lowest grain yield. The occurrence of drought tension significantly decreased soluble protein content. The activity of superoxide dismutase enzyme increased after anthesis in drought tension conditions. Catalase and peroxidase activity in the sensitive genotypes (Marvdast and DN-11) was less than the tolerant genotypes (Pishtaz and Sivand). It can be concluded that activating the enzymes defense system of catalase, peroxidase and superoxide dismutase antioxidants in wheat genotypes has had a major role in increasing tolerance to drought tension. |
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| Keywords: Wheat, Drought tension, Chlorophyll, Antioxidant enzymes. |
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Full-Text [PDF 287 kb]
(4282 Downloads)
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Type of Study: Research |
Subject:
Crop Physiology
Received: 2014/11/19 | Accepted: 2014/11/19 | Published: 2014/11/19
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