生态学杂志2011，Vol.30Issue(4)：656-663,8.
盆栽桐花树对不同遮光度的生理生态响应
Eco-physiological responses of pot-planted Aegiceras corniculatum to different shade levels.
摘要
Abstract
One-year-old Aegiceras corniculatum seedlings were planted in pots under 3 light intensities, i. e. , full sunlight, 45％ sunlight, and 25％ sunlight, aimed to study the eco-physiological responses of the seedlings to different shade levels after irrigated with fresh water and artificial seawater. After treated for 360 d, the annual increment of height growth at the same water salinities increased significantly with increasing light intensity, and had significant differences among the three light intensity treatments. On the contrary, the annual increment of stem diameter decreased significantly. The average branch number, leaf number, leaf area, and leaf thickness all existed significant differences among the treatments. At the same water salinities, the leaf chlorophyll a, chlorophyll b, and total chlorophyll contents had no significant differences under 25％ and 45％ sunlight but were significantly higher than those under full sunlight, while the chlorophyll a/b ratio had less difference among all the treatments. The net photosynthetic rate, soluble sugar content, nitrate reductase activity, and root vigor at same water salinities decreased significantly with the reduction of light intensity. Under the same light intensities, the seedlings irrigated with fresh water had lower soluble sugar content, nitrate reductase activity, and root vigor, compared with those irrigated with sea water. Our results indicated that shading had significant effects on the eco-physiology of pot-planted A. corniculatum.关键词
桐花树/淡水/人工海水/光照强度/生理响应分类
农业科技引用本文复制引用
刁俊明,陈桂珠..盆栽桐花树对不同遮光度的生理生态响应[J].生态学杂志,2011,30(4):656-663,8.基金项目
联合国环境规划署/全球环境基金项目(GF/2730-02-4340)、广东省科技计划项目(2010B031900044)和广东省科技计划项目(2009198)资助. （GF/2730-02-4340）
