Studies on some biomarkers for submergence tolerance in rice cultivars. Sidhartha Banerjee and Malay Kumar Adak*

Iranian Journal of Plant Physiology

مقاله 2، دوره 5، شماره 2، فروردین 2015، صفحه 1273-1280   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijpp.2015.539654

چکیده

In the present study, three rice varieties namely Swarna, Swarna Sub1A, and FR13A were evaluated on the basis of their antioxidative responses to screen submergence tolerance capabilities. Fourteen-day- old seedlings were completely submerged for 7 days and were observed to have a significant variation in reactive oxygen species like H₂O₂ and O₂^-. The variety Swarna recorded maximum accumulation of H₂O₂ and O₂^- and showed more susceptibility to submergence. On the other hand, chlorophyll content did not show highly significant variation among the varieties thus proving its uncertainty to be a trait under submergence. The activity of superoxide dismutase (SOD) had declined throughout the submergence period irrespective of varieties, being maximum in Swarna Sub1A and minimum in Swarna. Almost similar phenomenon was recorded in other two varieties showing their submergence susceptibility however with insignificant variation in terms of APX and CAT. The results from the present experiment point at the fact of submergence tolerance with the view of oxidative sensitivity in rice varieties and finally their possible roles as screening indices for submergence tolerance are discussed.

کلیدواژه‌ها

rice (Oryza sativa)؛ biomarkers؛ reactive oxygen species