Effect of NaCl and Na2SO4 stress on seed germination of Cosmos bipinnatus
Seeds of Cosmos bipinnatus are used as experimental materials, different concentrations of NaCl and Na2SO4 solution were made as treatments, respectively. Germination indices, and physiological index of seedlings were measured to study effects of NaCl and Na2SO4 stress on seed germination of Cosmos bipinnatus. Results showed that the germination energy, germination rate, the growth indices and SOD activity of seedling al decreased while MDA content of seedling increased with the increasing of concentrations of NaCl and Na2SO4 solution. Suitable concentration range of Cosmos bipinnatus under NaCl and Na2SO4 stress was 0.11 and 0.08 mol·L-1, the half-lethal concentration was 0.67 and 0.13 mol·L-1, and the fatal concentration was 1.35 and 0.23 mol·L-1, respectively. Therefore, NaCl and Na2SO4 salt stress had inhibitory effects on seed germination of Cosmos bipinnatus, and inhibitory effect of Na2SO4 on seed germination of Cosmos bipinnatus was stronger than NaCl under the same concentration .
NETL
NSTL
万方数据
维普
