山鸡椒和光叶决明叶片叶绿素及光合荧光对光强的响应  

Effects of Light Intensity on Chlorophyll Content and Photosynthetic Fluorescence of Litsea cubeba and Cassia floribunda

作　　者：康华靖[1] 应苗苗[1] 戎建涛[1] 王艳英[1] KANG Hua-jing;YING Miao-miao;RONG Jian-tao;WANG Yan-ying(Wenzhou Vocational College of Science and Technology, Wenzhou 325006, China)

机构地区：[1]温州科技职业学院,浙江温州325006

出　　处：《浙江林业科技》2016年第6期24-29,共6页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省科技厅项目(2014C25039);温州市2015年公益性科技计划项目(S20150023);温州市科技计划项目(S20130003);温州市重点科技创新团队项目(C20150008)

摘　　要：2015年5月,对山鸡椒(Litsea cubeba)和光叶决明(Cassia floribunda)幼苗进行全光处理和65%遮阳处理,2015年9月对相关数据进行测定。结果表明,遮阳处理下山鸡椒叶片的叶绿素a(Chla)、叶绿素b(Chlb)、Chl(a+b)以及类胡萝卜素(Car)含量均显著提高(P<0.05),Chla/Chlb比值则无明显变化(P?0.05);遮阳处理下光叶决明叶片的Chlb和Chl(a+b)含量显著提高,Chla和Car含量无显著变化,Chla/Chlb比值则显著下降。遮阳处理下山鸡椒和光叶决明叶片的初始量子效率(α)、最大光合速率(Pnmax)、饱和光强(LSP)、光补偿点(LCP)、暗呼吸速率(Rd)、光系统II(PSII)的电子传递速率(ETRII)、光化学猝灭系数(q P)、PSII实际光化学效率(ΦPSII)、光系统I(PSI)的电子传递速率(ETRI)和非光化学淬灭系数(NPQ)均有所降低,而山鸡椒叶片的荧光参数除ETRI和NPQ外也均有所降低。试验显示,山鸡椒和光叶决明虽偏向于喜阳树种,但山鸡椒幼苗的光饱和点较低,在种植时应进行适当的遮阳。Experiments were conducted on open air and65%shading on Litsea cubeba and Cassia floribunda seedlings in May2015anddetermination was implemented in September.The result demonstrated that content of chlorophyll a,chlorophyll b,chlorophyll(a+b)and carotenoidof L.cubeba seedling treated by shading increased significantly,while ratio of chlorophyll a to chlorophyll b had no significant difference.Content ofchlorophyll b and chlorophyll(a+b)of C.floribunda seedling treated by shading increased significantly,while content of chlorophyll a andcarotenoid had no significant change,ratio of chlorophyll a to chlorophyll b decreased significantly.Initial quantum efficiency(α),maximumphotosynthetic rate(Pnmax),light saturated point(LSP),light compensation point(LCP),dark respiration rate(Rd),apparent photosynthetic electrontransport rate(ETRII),photochemical quenching coefficient(qP)and actual photochemical efficiency(ΦPSII)of C.floribunda seedlings treated byshading decreased.While that of Litsea cubeba seedlings also decreased excluding ETRI and non-photochemical quenching coefficient(NPQ).Theexperiment indicated that L.cubeba and C.floribunda are light-demanding species.

关 键 词：山鸡椒 光叶决明 叶绿素 光强 光合作用 

分 类 号：S718.45[农业科学—林学]