Anti-oxidative response of different wheat genotypes to drought during anthesis .

Iranian Journal of Plant Physiology

مقاله 7، دوره 6، شماره 4، آبان 2016، صفحه 1845-1854   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijpp.2016.532655

نویسندگان

Nayer Mohammadkhani^* ؛ Parisa Sharifi

Shahid Bakeri High Education Center of Miandoab, Urmia University, Urmia, Iran

چکیده

The aim of this work was to study drought effects on lipid peroxidation, antioxidant compounds, and anti-oxidative enzymes activities in two tolerant (Daric and 92 Zhong), two moderately tolerant (Sabalan and DH-2049-3) and two sensitive (Shark and Tevees) wheat genotypes. Malondialdehyde content and electrolyte leakage increased significantly (P<0.05) in flag leaves under drought. The increase was higher in sensitive genotypes compared to the others. Protective enzymes activities (ascorbate peroxidase, peroxidase, superoxide dismutase, catalase and glutathione reductase) and non- enzymatic antioxidants contents (ascorbate and glutathione) increased under drought stress and this increase was higher in tolerant genotypes. There were significant positive correlations (P<0.05) between anti-oxidative enzyme activities and non- enzymatic antioxidants. It seems that peroxidase and superoxide dismutase - that showed higher increase under stress- had an important role in drought tolerance.

کلیدواژه‌ها

Anti-oxidative enzymes؛ abiotic stress؛ antioxidants؛ free radicals؛ Tolerance