生态学杂志2011，Vol.30Issue(3)：415-423,9.
铜对凤丹生长、生理及体内矿质元素吸收分配的影响
Effects of Cu on Paeonia ostii growth,physiology,and element absorption and allocation
摘要
Abstract
A pot experiment was conducted to study the tolerance of Paeonia ostii to different levels (low, 300 mg · kg-1; medium, 600 mg · kg-1; and high, 900 mg · kg-1) of added Cu. P. ostii had strong tolerance to Cu. The plant height and root collar growth, taproot thickening and elongation, and biomass of roots and shoots were less affected. Under the Cu treatments, the tolerance index of roots and shoots was higher than 0. 5. The superoxide dismutase ( SOD) activity in roots decreased significantly under the Cu treatments, but that in leaves increased significantly under low Cu treatment. With increasing concentration of added Cu, the peroxidase ( POD) activity in roots and leaves decreased after an initial increase. The MDA both in roots and in leaves did not have a significant increase under low and medium Cu treatments. The soluble sugar and soluble protein contents in roots and leaves increased with increasing concentration of added Cu, while the contents of chlorophyll a, b, and a＋b and the chlorophyll a/b ratio were peaked at medium Cu treatment. With increasing concentration of added Cu, the Cu content in roots and stems increased, while that in leaves decreased after an initial increase. The Cu enrichment coefficient in each part of the plant under the Cu treatments was less than 1. The Cu treatments led to a significant reduction in the P and Ca absorption, but promoted the upward translocation of absorbed P and K. Low and medium Cu treatments promoted the Mg accumulation in leaves, but high Cu treatment inhibited it. The Fe and Mn accumulation in roots was inhibited under the Cu treatments, while the Fe and B accumulation in leaves and the upward translocation of absorbed Fe, Mn, Zn, and B were promoted under low and medium Cu treatments. The accumulation of Zn in each part of P. ostii was less affected by the Cu treatments.关键词
凤丹/铜耐性/生理反应/元素/吸收分配分类
资源环境引用本文复制引用
周燕,张桂花,徐迎春,程家高,陈亚华,李雪..铜对凤丹生长、生理及体内矿质元素吸收分配的影响[J].生态学杂志,2011,30(3):415-423,9.基金项目
国家自然科学基金项目(30871598)资助. （30871598）
