热带作物学报2017，Vol.38Issue(10)：1836-1839,4.DOI:10.3969/j.issn.1000-2561.2017.10.011
遮荫下东非狼尾草叶片形态和光合特征变化
Leaf Morphological and Photosynthetic Characteristics of Pennisetum clandestinum Affected by Shade Environment
摘要
Abstract
Pennisetum clandestinum is an excellent grass which is widely used on urban greening and soil erosion control,however,but shade limits its further utilization.The effects of shading on the morphological and photosynthetic characteristics of P.clandestinum were studied in our experiment.The results showed the leaf length,leaf water content were significantly increased by shading compared with with plants growing under full sunshine.In term of chlorophyll a and chlorophyll b content,they increased by above 50％ (p＜0.05).In contrast,leaf width,maximal photosynthetic rate (Amax),light saturation point (LSP) and light compensation point (LCP) significantly decreased (p＜0.05).Of them,Amax decreased by 50.9％ and LCP decreased from 17.6 to 6.56 μmol/(m2·s).From above,it could be concluded that the leaves of P.clandestinum growing under shade environment were adaptable due to its capacity to use scattered-light through increasing the chlorophyll content,decreasing LSP and LCP.As a result,P.clandestinum could be utilized under a certain degree of shade environment.关键词
东非狼尾草/遮荫/光合速率/叶绿素Key words
Pennisetum clandestinum/shade/photosynthetic rate/chlorophyll分类
农业科技引用本文复制引用
许喆,代微然,和柏先,孙文君,任健..遮荫下东非狼尾草叶片形态和光合特征变化[J].热带作物学报,2017,38(10):1836-1839,4.基金项目
云南农业大学教育教学改革研究和课程建设项目(No.2017YAUJY019). （No.2017YAUJY019）
