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Biological responses of wheat (Triticum aestivum) plants to the herbicide simetryne in soils

文献类型： 外文期刊

作者： Jiang, Lei 1 ; Yang, Yi 1 ; Jia, Lin Xian 1 ; Lin, Jing Ling 3 ; Liu, Ying 1 ; Pan, Bo 1 ; Lin, Yong 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China

2.Agroenvironm Minist Agr, Danzhou Sci Observing Expt Stn, Danzhou 571737, Peoples R China

3.Chinese Acad Trop Agr Sci, Anal & Testing Ctr, Haikou 571101, Peoples R China

关键词： Simetryne;Wheat;Accumulation;Oxidative stress;Antioxidant enzymes;Gene expression

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The rotation of rice and wheat is widely used and highly endorsed, and simetryne (s-triazine herbicide) is one of the principal herbicides widely used in this rotation for weed and grass control. However, little is known regarding the mechanism of the ecological and physiological effects of simetryne on wheat crops. In this study, we performed a comprehensive investigation of crop response to simetryne to elucidate the accumulation and phytotoxicity of the herbicide in wheat crops. Wheat plants exposed to 0.8 to 8.0 mg kg(-1) simetryne for 7 d exhibited suppressed growth and decreased chlorophyll content. With simetryne concentration in the soil varied from 0.8 mg kg(-1) to 8.0 mg kg(-1), simetryne was progressively accumulated by the wheat plants. The accumulation of simetryne in the wheat plants not only induced the over production of ROS and injured the membrane lipids but also stimulated the production of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR) and glutathione S-transferase (GST). A test of enzymatic activity and gene expression illustrated that the wheat plants were wise enough to motivate the antioxidant enzymes through both molecular and physiological mechanisms to alleviate the simetryne-induced stress. This study offers an illuminating insight into the effective adaptive response of the wheat plants to the simetryne stress. (C) 2016 Elsevier Inc. All rights reserved.

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