Diurnal Variation of Photosynthetic Physiological Characteristics of Kadsura coccinea(Lem.)A.C.Smith  

作　　者：Zongyou CHEN Shengfeng CHAI Xiaoxue QI Yujing Wei Huafei CEN 

机构地区：[1]Guangxi Institute of Botany,Chinese Academy of Sciences,Guangxi Zhuang Autonomous Region,Guilin 541006,China

出　　处：《Agricultural Biotechnology》2021年第4期48-50,54,共4页农业生物技术（英文版）

基　　金：Supported by Guangxi Key R&D Program Project(GKAB18221091);Guilin Scientific Research and Planning Science and Technology Key Project(20160223-1)。

摘　　要：[Objectives]This study was conducted to investigate the diurnal variations of photosynthetic and physiological characteristics in 3-year-old Kadsura coccinea(Lem.)A.C.Smith plants.[Methods]A Li-6400 portable photosynthetic system was used to study the diurnal variations of the photosynthetic physiological characteristics of K.coccinea.[Results]The diurnal variation of the net photosynthetic rate(Pn)of K.coccinea leaves showed a"double peak"curve,and there was a lunch break at noon.The maximum value of Pn[4.51 mmol/(m^(2)·s)]appeared at 10:00,and the daily average Pn was 3.98 mol/(m^(2)·s);and the stepwise regression analysis showed that photosynthetically active radiation(PAR)and stomatal conductance(Gs)were the main factors affecting Pn.The partial correlation analysis and path analysis showed that the order of effects on Pn was Gs>PAR.[Conclusions]This study provides a reference for further research on the development and utilization of K.coccinea.

关 键 词：Kadsura coccinea(Lem.)A.C.Smith Net photosynthetic rate Daily variation PHOTOSYNTHESIS 

分 类 号：S791.49[农业科学—林木遗传育种]