Effects of Simulated Acid Rain on Seed Germination and Seedling Growth of Wheat
The effects of acid rain on seed germination and seedling growth of wheat which were treated with simulated acid rain at pH 1.0,2.0,3.0,4.0,5.0,6.0 and 7.0 were studied.The results showed that the indexes of seed germination and seedling growth of wheat reduced with the decrease of the pH value and were inhibited by the lower pH.The indexes of seed germination and seedling growth of wheat were not significant compared with CK with the pH value from 5.0 to 6.0 (P＞0.05) and showed resistance to acid.When the pH value was less than 5.0,the seed germination and seedling growth of wheat were sharply inhibited and the indexes were significantly lower than CK (P＜0.05),while the wheat didn't shoot up at pH 1.0 at all.The results also showed that simulated acid rain with different pH values had a larger effect on the seedling physiological indexes of wheat,the content of chlorophyll,carotenoid,protective enzyme (SOD,POD,CAT) and the protective enzyme (PPO,PAL) activity showed a decreasing trend with the increase of acid,but the relative conductivity and malondialdehyde (MDA) showed an increasing trend.Based on above results,we can conclude that the effect of simulated acid rain on wheat seedling growth was more sensitive than seed germination.
国家科技期刊平台
NSTL
万方数据
维普
