三种野生菊科植物的耐荫性研究  

Shade Tolerance of Three Native Compositae Plants

作　　者：刘欣[1,2] 林杏莉 庄雪影[1] 

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642 [2]棕榈园林股份有限公司,广东广州510627 [3]深圳市东湖公园,广东深圳518040

出　　处：《广东园林》2016年第2期30-33,共4页Guangdong Landscape Architecture

基　　金：广东省野生菊科观赏植物资源的调查及引种项目(编号:H13193)

摘　　要：夜香牛Vernonia cinerea、金钮扣Spilanthes paniculata和千里光Senecio scandens为华南地区野生菊科植物。应用遮荫处理法,比较研究了3种植物的光合生理特性和耐荫性。结果表明:夜香牛、金钮扣和千里光均为喜光植物,其最大净光合效率Pmax、光饱和点LSP和光补偿点LCP最大值均出现在全光照条件,并随着遮荫程度的增加而下降。3种植物的叶绿素a、叶绿素b和叶绿素总量以中度遮荫条件下最高,在全光照和重度遮荫条件下较低;随遮荫程度的增加,叶绿素a/b、比叶重和可溶性蛋白含量均呈下降趋势;在遮荫条件下,3种植物的过氧化物酶POD活性显著下降。基于研究结果,探讨了它们在华南园林中的应用前景。Vernonia cinerea, Spilanthes paniculata and Senecio scandens are native Compositae plants in South China. The shade tolerance of the three species are evaluated by shading experiment. The result shows they all are sun plant, and the maximum net photosynthetic rates（Pmax）, light saturation point（LSP） and light compensation point（LCP） of three species are the highest in the full sunlight condition, but decrease with shading. Three species in middle shading conditions had the highest content of chlorophyll a, chlorophyll b, and total chlorophyll（a＋b）. With the increasing of shading, the ratios of chlorophyll a/b, specific leaf weight and soluble protein are decreased. The activities of peroxidase（POD） decreased in shading condition. Based on the above results, the application potentials of the three plants in Southern China landscape are discussed.

关 键 词：夜香牛 金钮扣 千里光 耐荫性 光合特性 生理指标 

分 类 号：S688[农业科学—观赏园艺]