模拟酸雨对3种果树的胁迫效应

Stress Effects of Simulated Acid Rain on Three Fruit Species

摘要:

以青梅(PrunusmumeSieb.&Zucc.)、龙眼(DimocarpuslonganLour.)和杨桃(AverrhoacarambolaL.)3种南方果树为材料,研究不同pH值的模拟酸雨对其生理胁迫的效应。在酸雨胁迫下3种果树的叶片叶绿素含量均随pH值的降低有不同程度的下降,叶片伤害率、细胞质膜透性、脯氨酸及丙二醛(MDA)含量则随pH值的降低而上升。抗性较强的龙眼的生理生化指标的变幅最小,其次是杨桃,对酸雨胁迫反应较敏感的青梅变幅最大。

Abstract:

Observations and analyses were made of changes in the physiology of leaves of Prunus mume, Averrhoa carambola and Dimocarpus longan subjected to simulated acid rain at pHs 2.0, 2.5, 3.0 and 4.0 levels. The results showed that chlorophyll contents in the three fruit species decreased with the decrease of pH level, while leaf damage rate, cell permeability, proline and malodialdehyde contents increased. Physiological changes in D. longan was the least. P. mume was most sensitive to acid rain stress.