【摘要】 将女贞种子和 1年生幼苗置于不同pH值的模拟酸雨条件下观测和分析其形态和生理变化。结果表明 ,不同处理间女贞种子发芽率无统计上的显著差异 ,但 pH2 .0和pH3 .5的模拟酸雨对种子发芽显示了一定的抑制作用。在pH2 .0的模拟酸雨条件下 ,女贞幼苗叶片表现明显的受害症状 ,叶绿素含量下降 ,细胞透性增加 ,叶汁液酸化 ,从而使幼苗生长严重受阻。在 pH3 .5的处理下幼苗没有表现明显的形态和生理变化 ,但生长量呈现下降趋势 ,而 pH5.0的处理对幼苗地上部分生长产生一定的促进作用。pH6.0的模拟酸雨对种子萌发和幼苗生长的影响不明显更多还原

【Abstract】 Observation and analysis were made on changes in morphology and physiology of seeds and seedlings of \%Ligustrum lucidum\% which were subjected to a simulated acid rain adjusted to different pH levels. The results showed that differences in germination rates were not statistically significant among the treatments, but pH2.0 and pH3.5 acid treatments were found to inhibit germination slightly. Under the exposure to pH2.0 treatment, seedling growth was severely retarded, due to the visible damage to foliage, decreased chlorophyll contents, elevated leaf cell permeability, and acidified leaf sap. While no significant morphological and physiological changes were observed, seedlings exhibited growth declines by pH3.5 treatment. Top growth was stimulated by pH5.0 acid treatment. No significant treatment effects were observed at pH 6.0.更多还原