应用生态学报2012，Vol.23Issue(1)：45-50,6.
铝胁迫对青杨雌雄幼苗生理生态特征的影响
Effects of aluminum stress on ecophysiological characteristics of male and female Populus cathayana seedlings
摘要
Abstract
This paper studied the sex-specific differences of male and female Populus cathayana seedlings in their ecophysiological characteristics and photosynthesis under the stress of aluminum (216 mg Al3+ · kg-1). Under the effects of aluminum, the malonaldehyde (MDA) and soluble protein (Pr) contents of the male and female seedlings increased significantly (P<0. 001), and the males had a significantly lower MDA content and a significantly higher Pr content than the females. The peroxidase ( POD) activity of the males increased but the superoxide dismutase (SOD) activity decreased significantly, while the POD and SOD activities of the females had no significant variation. The net photosynthetic rate ( Pn) of both male and female seedlings decreased significantly (P = 0.001) , and the transpiration rate (Tr) of the female seedlings decreased (P = 0.007) and the instant water use efficiency (WUEi) increased significantly, while no significant variations were observed in the Tr and WUE, of the male seedlings. The total chlorophyll and chlorophyll a contents and chlorophyll a/b ratio of the females decreased significantly, resulting in a significantly higher chlorophyll a/b ratio of the males. The specific leaf area (SLA) of the females decreased but that of the males increased significantly. No significant variation was observed on the leaf- and stem dry mass. Comparing with the females, the males had higher Pr and chlorophyll contents and higher active antioxidant enzymes activity to maintain higher Pn, and thus, had greater resistance against aluminum stress.关键词
青杨/雌雄异株/铝胁迫/生理生态特征Key words
Populus cathayana/ dioecious/ aluminum stress/ ecophysiological characteristics分类
农业科技引用本文复制引用
李俊钰,胥晓,杨鹏,王碧霞,王志峰,李霄峰..铝胁迫对青杨雌雄幼苗生理生态特征的影响[J].应用生态学报,2012,23(1):45-50,6.基金项目
国家自然科学基金项目(30771721,31170389)资助. （30771721,31170389）
