西南林业大学学报2018，Vol.38Issue(3)：63-70,8.DOI:10.11929/j.issn.2095-1914.2018.03.010
增温对滇杨和川杨生长及生理特性的影响
Effects of Temperature Enhancement on the Growth and Physiological Properties of Populus yunnanensis and Populus szechuanica
摘要
Abstract
Open-top chambers(OTC) were used to simulate temperature enhancement to explore the effects of global warming on plant height,biomass,the number of buds,antioxidant enzyme,free proline and net photosyn-thetic rate of Populus yunnanensis and P.szechuanica. Results showed that the average height,dry weight,and av-erage internode length were increased in both P.yunnanensis and P.szechuanica in comparison with CK,whereas a significant increase was not observed in P.szechuanica. POD activity in leaves of P.yunnanensis and P.szechuanica was significantly decreased while free proline content was significantly increased.At the same time,the soluble sug-ar content in leaves of P.szechuanica was significantly redcued, in contrast, the MDA concentration in leaves of P.yunnanensis was significantly increased. Under the warming conditions,net photosynthetic rate(Pn),total chlo-rophyll as well as chlorophyll content were increased in both P.yunnanensis and P.szechuanica. Furthermore, the changes of chlorophyll content in P.szechuanica were more significant. As a result, it could be concluded that P.yunnanensis and P.szechuanica were able to adapt to temperature enhancement through internal adjustment, as manifested by increases of proline and chlorophyll as well as Pn. The different responses between P.yunnanensis and P.szechuanica to temperature enhancement indicated that P.szechuanica from the high-altitude might physiolog-ically better adapt to global warming.关键词
模拟增温/生理特性/生长/光合速率Key words
simulated temperature enhancement/phsiological property/growth/photosynthetic rate分类
农业科技引用本文复制引用
杨春勐,代微然,索默,李荣,许喆,任健..增温对滇杨和川杨生长及生理特性的影响[J].西南林业大学学报,2018,38(3):63-70,8.基金项目
国家自然科学基金项目(31260167)资助. （31260167）
