Effects of ABA on Photosynthetic Characteristics of Pods and Yield of Brassica napus

作     者：李俊 张春雷 马霓 余利平 晁赢 李玲 

作者机构：中国农业科学院油料作物研究所农业部油料作物生物学与遗传育种重点实验室农业部作物生理生态与栽培重点开放实验室湖北武汉430062 

出 版 物：《Agricultural Science & Technology》 (农业科学与技术（英文版）)

年 卷 期：2012年第13卷第4期

页      面：760-762,903页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Supported by National Natural Science Foundation of China(31101124) National Modern Rapeseed Industry Technology System 

主　　题：Brassica napus L Pod Abscisic acid （ABA） Photosynthetic characteristics Yield 

摘      要：[Objective] The aim was to evaluate the effects of different concentrations of ABA on photosynthetic characteristics of pods and yield of Brassica napus and analyze the relationships between ABA concentration and yield components, to provide theoretical basis for cultivation of high-yield rapeseed. [Method] At the end of flowering stage, the rape plants were separately sprayed with 1, 2, 100 and 200μmol/L of ABA; photosynthetic parameters, water use efficiency （WUE）, yield and yield components of the rape plants were investigated 0, 5, 10 and 15 d later, respectively. [Result] ABA treatment with different concentrations significantly changed pod photosynthetic parameters and yield components of rapeseed. Low concentra- tions of ABA could improve pod＇s net photosynthetic rate and yield components while high concentrations had the contrary effect. [Conclusion] Whether ABA func- tioned in inhibiting or promoting role might depend on the interaction between endogenous hormone levels and exogenous ABA concentration. Improvement of WUE would be the main reason for yield increasing.