Effects of salinity on antioxidant system in ten grape genotypes.

Iranian Journal of Plant Physiology

مقاله 2، دوره 8، شماره 1، دی 2017، صفحه 2247-2255   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijpp.2017.539068

نویسندگان

Nayer Mohammadkhani¹؛ Nasser Abbaspour^{* 2}

¹Shahid Bakeri High Education Center of Miandoab, Urmia University, Urmia, Iran

²Department of Biology, Faculty of Science, Urmia University, Urmia, Iran

چکیده

Salinity is an important environmental factor that limits plant growth and production. Grape is classified as salt sensitive plants. The object of this study was to evaluate effects of salinity on membrane lipid peroxidation, antioxidant components, and antioxidative enzymes activity in ten grape genotypes native to the regions around Urmia Salt Lake.Malondialdehyde content and protective enzymes activities in roots and leaves of ten genotypes increased significantly (p≤0.05) under salinity. Salinity had an obvious effect on the accumulation of total phenolics content and induced phenylalanine ammonia-lyase enzyme activity in all genotypes. H6 showed low increases in Malondialdehyde content, also this genotype showed good enzymes activities and total phenolics content and PAL activity. There were significant positive correlations (p≤0.01, r²=0.7) between antioxidative enzyme activities, total phenolics content, and phenylalanine ammonia-lyase activity in the leaves of all genotypes. It seems that H6 showed a higher capacity to tolerate salinity compared to the other genotypes.

کلیدواژه‌ها

Anti-oxidative enzymes؛ Salt stress؛ phenylalanine ammonia-lyase activity؛ Lipid peroxidation