|
| Combined Effects of Cd and Enhanced UV-B Radiation on Growth and Physiology of Winter Wheat Seedling |
| |
| View Full Text View/Add Comment Download reader |
| KeyWord:cadmium; enhanced UV-B radiation; growth; chlorophyll; flavonoid; MDA |
|
|
| Hits: 1886 |
| Download times: 1586 |
| Abstract: |
| The effects of the individual and combined cadmium（Cd）, enhanced UV-B radiation on the growth and physiology of winter wheat were studied with seeds germination and pot experiments. Results showed that：（1）No significant effect of the Cd and enhanced UV-B radiation individual or combined stress on seeds germination rate of winter wheat was observed. The growth of winter wheat seedlings was inhibited significantly. The inhibitory effects with the combined stress were significantly greater than with a single stress.（2）The chlorophyll contents in winter wheat leaves decreased significantly and the flavonoid contents increased significantly under enhanced UV-B radiation. The effects of Cd stress were not obvious. The effects of enhanced UV-B radiation on chlorophyll and flavonoid contents did not intensify with the combined Cd stress.（3）The cell membrane permeability of winter wheat leaves increased significantly with individual Cd or enhanced UV-B radiation stresses. The MDA contents increased significantly with Cd stress. The effects of Cd stress on the MDA contents in winter wheat leaves were promoted by the combined enhanced UV-B radiation.（4）The contents of Cd in winter wheat shoots under Cd and enhanced UV-B radiation combined stresses were significantly higher than that under Cd stress. These results indicate that there were additive effects of Cd and enhanced UV-B radiation combined stress on the growth and physiology of winter wheat. |
