Antioxidant Defence System and Chloroplasts Photochemical Characteristics of Wheat Genotypes Subjected to Water Stress
Activities of catalase, ascorbate peroxidase, superoxide dismutase and glutathione reductase, as well as carotenoid content and photochemical activity of Photosystem Ⅰ and Photosystem Ⅱ were studied in leaves of durum and bread wheat genotypes. It was found out that dynamics of catalase and ascorbate peroxidase functioning in well-watered plants through ontogenesis practically did not change both among durum and among bread wheat cultivars. Functioning of these enzymes during ontogenesis under water deficit differed. Catalase activity increased in all stressed genotypes: in durum wheat cultivars maximal activity was observed in the milk ripeness and in bread wheat cultivars - in the end of flowering. Ascorbate peroxidase activity also increased under water deficit: in tolerant wheat genotypes maximal activity occurred in the end of flowering, in sensitive onesin the end of ear formation. The maximum activity of glutathione reductase both as in the control, as well as in drought-subjected plants was observed in the anthesis stage. Superoxide dismutase activity was lower than the control during ontogenesis, excepting the last stages. It should be noted that PS Ⅰ and PS Ⅱ photochemical activity were also high in genotypes subjected to drought both in the end of ear formation and flowering stages.
Wheat genotypes Antioxidants Carotenoids PS Ⅰ PS Ⅱ
Samira M Rustamova Hasan H Babayev Irada M Huseynova
Institute of Botany, Azerbaijan National Academy of Sciences, Baku, Azerbaijan
国际会议
15th International Conference on Photosynthesis(第15届国际光合作用大会)
北京
英文
568-571
2010-08-22（万方平台首次上网日期，不代表论文的发表时间）