长期大气污染对园林树木叶片生理生化指标的影响

本文研究了长期生长在大气污染条件下几种园林树木叶片生理生化指标的变化。结果表明,大气污染使树木叶片中叶绿素、可溶性糖、淀粉、蛋白质等含量下降,使脯氨酸的含量成倍增加。随着污染时间的延长,各树种各指标的变化情况也不相同,依各树种各指标的变化情况,可将研究的5个树种分为抗性强和抗性弱两类,前者包括加杨、旱柳、榆树,后者为山桃、丁香。

Effects of Prolonged Air Pollution on Physio-biochemical indexes of Leaves of Park Trees

In this paper changes in physio-biochemical indexes of leaves of several park free species exposed to air pollution were studied. The results showed that air pollution reduced the chlorophlyll, soluble sugar, sturch and protein contents in the leaves of trees, and doubled the proline level. The changes in different indexes in different trees varied, as the pollution progressed. the trees were grouped under two categorices: highly resistant and low resistant, the former included Canada poplar, Hankow willow and elm; the latter-David peech and lilac.