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  1 - Studying the effect of drought stress on enzymatic and non-enzymatic antioxidant system of some grape cultivar
  Mojtaba gholizadeh mehdi Haddadinejad علی عبادی Ali Mohammadi Torkashvand
  In order to investigate the effect of drought stress on the enzymatic and non-enzymatic antioxidant system of six grape varieties, a factorial experiment was conducted based on a completely randomized design with three replications under greenhouse conditions. In this e More

  In order to investigate the effect of drought stress on the enzymatic and non-enzymatic antioxidant system of six grape varieties, a factorial experiment was conducted based on a completely randomized design with three replications under greenhouse conditions. In this experiment, the treatments included six grape varieties (Asgari, Khalili, Yaquti, Pikami, Turkmen 4 and Suzak) and four levels of drought stress (normal conditions (100% of the farm capacity), low stress (75% of the farm capacity), medium stress (50% of the farm capacity) and severe stress treatment (25% of the farm capacity). The results showed that the traits of proline, malondialdehyde, catalase enzymes and ascorbate peroxidase enzymes improved with increasing stress intensity. increased significantly. On the other hand, the content of total phenol decreased significantly with the increase of the intensity of stress. Among the cultivars studied, Yaqouti cultivar is more resistant to drought than other grape cultivars in terms of the studied indices. The highest amount of catalase enzyme activity was recorded in Yaqouti cultivar, so that its catalase enzyme activity at the levels of 75, 50 and 25% of the agricultural capacity increased by 13, 12 and 46% respectively compared to the 100% agricultural capacity. According to the results of this research, it seems that Yaghuti cultivar is more drought tolerant than other cultivars. Since this toleration mechanisms located in leaf of Yaghuti, it is necessary to carry out additional tests when using as rootstock. Manuscript profile