科研成果
| 论文编号: | DOI: 10.1139/X08-040 |
| 第一作者所在部门: | 生态研究中心 |
| 论文题目: | Interactions between drought and shade on growth and physiological traits in two Populus cathayana populations |
| 作者: | Xiaoxia Huang |
| 全部作者: | Xiaoxia Huang,Chuanying Yin,Baoli Duan,Chunyang Li |
| 论文出处: | |
| 刊物名称: | CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE |
| 年: | 2008 |
| 卷: | 38 |
| 期: | 7 |
| 页: | 1877-1887 |
| 联系作者: | 李春阳 |
| 收录类别: | |
| 影响因子: | 1.434 |
| 摘要 : | The morphological and physiological responses of two contrasting Populus cathayana Rehd. populations to three light regimes, full sunlight (control), 33% full sunlight (moderate shade), and 12% full sunlight (severe shade), were investigated under well-watered and drought conditions. The populations were from Hanyuan (relatively more annual rainfall and less annual solar radiation) and Ledu (less annual rainfall and more annual solar radiation) in western China. In both populations, drought-treated plants exhibited reduced growth, leaf relative water content, net photosynthesis, and maximal efficiency of photosystem II (PSII); increased levels of chlorophyll, carotenoid, abscisic acid, and carbon isotope composition; and a greater accumulation of malondialdehyde (MDA) than did well-watered plants. There was an apparent alleviation of drought effects by moderate shade, especially in the Hanyuan population, as indicated by the higher leaf relative water content, net photosynthesis, stomatal conductance, and maximal efficiency of PSII and the lower MDA content.On the other hand, an apparent aggravation of drought effects by severe shade was also observed, especially in the Ledu population, as indicated by the lower total biomass and net photosynthesis and the higher MDA content. Moreover, the Hanyuan population was more shade tolerant and drought sensitive than the Ledu population. |
| 英文摘要 : | |
| 外单位作者单位 : | |
| 备注 : | |