Changes of Oxidative Stress and Soluble Sugar in Anthers Involve in Rice Pollen Abortion Under Drought Stress  

作　　者：FU Guan-fu SONG Jian XIONG Jie LI Yu-rong CHEN Hui-zhe LE Ming-kai TAO Long-xing 

机构地区：[1]State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, P.R.China

出　　处：《Agricultural Sciences in China》2011年第7期1016-1025,共10页中国农业科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (30871473);the project from the China National Rice Research Institute (2009RG0035);the projects from Local Government of Zhejiang Province, China (2008C22073, 2009C32048, and SN200806);the Zhejiang Provincial Natural Science Foundation, China (Y3100060 and Y3100090)

摘　　要：Two rice maintaining lines with different drought tolerances, viz., Jin 23B （tolerant） and Zhenshan 97B （sensitive）, were used to study the oxidative stress and soluble sugar in rice anthers and pollen viability under drought stress during flowering stage. Higher antioxidant enzyme activities and lower malonaldehyde （MDA） content in rice anthers were observed in Jin 23B than in Zhenshan 97B under drought stress. Further, a great increase in the content of soluble sugar in rice anthers of Jin 23B was observed across the whole drought exposure, while Zhenshan 97B showed significant decrease in soluble sugar during 9-12 d after drought stress （DADS）. Accordingly, a marked decline of pollen fertility and activity, pollen numbers in an anther and pollen numbers on a stigma was observed in Zhenshan 97B, whereas little difference was found in Jin 23B. Thus, we suggest that pollen abortion caused by drought stress may be related with the reciprocity between oxidative stress and soluble sugar content in rice anthers.Two rice maintaining lines with different drought tolerances, viz., Jin 23B （tolerant） and Zhenshan 97B （sensitive）, were used to study the oxidative stress and soluble sugar in rice anthers and pollen viability under drought stress during flowering stage. Higher antioxidant enzyme activities and lower malonaldehyde （MDA） content in rice anthers were observed in Jin 23B than in Zhenshan 97B under drought stress. Further, a great increase in the content of soluble sugar in rice anthers of Jin 23B was observed across the whole drought exposure, while Zhenshan 97B showed significant decrease in soluble sugar during 9-12 d after drought stress （DADS）. Accordingly, a marked decline of pollen fertility and activity, pollen numbers in an anther and pollen numbers on a stigma was observed in Zhenshan 97B, whereas little difference was found in Jin 23B. Thus, we suggest that pollen abortion caused by drought stress may be related with the reciprocity between oxidative stress and soluble sugar content in rice anthers.

关 键 词：drought stress oxidative stress soluble sugar pollen abortion rice anthers flowering stage 

分 类 号：S511[农业科学—作物学] Q945.78[生物学—植物学]