Gibberellin A(3) pretreatment increased antioxidative capacity of cucumber radicles and hypocotyls under suboptimal temperature

文献类型： 外文期刊

第一作者： Li, Qingzhu

作者： Li, Qingzhu;Li, Chaohan;Shi, Qinghua;Yu, Xianchang

作者机构：

关键词： Cucumis sativus L.;gibberellin;suboptimal temperature;hypocotyls;radicles;antioxidative activity

期刊名称：AFRICAN JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：0.263； 五年影响因子：0.203 ）

ISSN： 1991-637X

年卷期： 2011 年 6 卷 17 期

页码：

收录情况： SCI

摘要： The effects of GA(3) on the growth and antioxidant capacity of cucumber hypocotyls and radicles under sub-optimal temperature were investigated. The elongation of hypocotyls and radicles was significantly promoted by GA(3) treatment under sub-optimal temperature, and the effects greatly depended on GA(3) concentrations. In the previous reported investigation, there is not much information on the role of GA(3) in modulating reactive oxygen species (ROS) under stress conditions, the present study indicated that GA(3) treatment could decrease excess accumulation of ROS and alleviate lipid peroxidation which was induced by sub-optimal temperature in cucumber hypocotyls and radicles, the alleviating effects were highly correlated with the increasing activities of antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) as well as antioxidative activity indicated as alpha,alpha-diphenyl-beta-picryllhydrazyl (DPPH) scavenging activity, hydroxyl radical (center dot HO) scavenging activity and ferrous ion chelating activity. Furthermore, the increasing antioxidative activity was positively related with amylase activity in cucumber cotyledons, suggesting that the distribution of carbohydrate from cotyledons to hypocotyls and radicles might be responsible for higher antioxidant activity induced by GA(3).

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