Effects of Selenium on Rice Growth and Salt Stress Tolerance
To elucidate the suitable selenium concentration for rice growth,rice seedlings were cultured in Kimura B nutrient solution containing different concentrations of sodium selenite,and phenotypic comparison and biochemical detection were conducted.The results showed that the main root length of rice was increased and the number of lateral roots was reduced by sodium selenite treatment at the concentrations of 2 μmol/L,4 μmol/L,and 8 μmol/L,while the growth of above-ground parts were not affected by that of these concentrations.Rice seedlings grew more slowly or did not grow anymore under sodium selenite concentrations of 40 μmol/L and 200 μmol/L,respectively,and the total leaf protein was significantly decreased,while superoxide dismutase(SOD)activity was remarkably improved.The tolerance of rice to salt stress treated with 8 μmol/L sodium selenite and sodium chloride was increased,and the total soluble protein in leaves was significantly higher than that of the control,while the activity of SOD was lower than that of the control.
国家科技期刊平台
NSTL
万方数据
维普
