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The growth and antioxidant defense responses of wheat seedlings to omethoate stress

文献类型： 外文期刊

作者： Zhang, Bo 2 ; Chu, Guixin 2 ; Wei, Changzhou 2 ; Ye, Jun 2 ; Li, Zhiqiang 2 ; Liang, Yongchao 1 ;

作者机构： 1.Chinese Acad Agr Sci, Minist Agr, Inst Agr Resources & Reg Planning, Key Lab Crop Nutr & Fertilizat, Beijing 100081, Peoples R China

2.Shihezi Univ, Coll Agr, Key Lab Oasis Ecoagr, Shihezi 832003, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Nucl & Biol Technol, Urumqi 830091, Peoples R China

关键词： catalase: 9001-05-2;EC 1.11.1.6;malondialdehyde: 542-78-9;peroxidase: 9003-99-0;EC 1.11.1.7;proline: 609-36-9;superoxide dismutase: 9054-89-1;EC 1.15.1.1;ascorbate peroxidase: 72906-87-7;EC 1.11.1.11;soluble protein;omethoate: 1113-02-6;pesticide;insecticide;oxidative stress;oxidative damage;food safety;crop growth;enzyme activity;physiological response;exposure time;biochemical response;dry shoot weight;antioxidant defense response

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）

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收录情况： SCI

摘要： Omethoate is one of the most powerful insecticides in China. Despite its high risks of human health and environmental safety, omethoate is still hard to be replaced because of its low price and high efficiency. To better understand physiological and biochemical responses to omethoate, we examined plant growth and antioxidative defense responses as well as omethoate uptake in wheat seedlings grown hydroponically with omethoate. Fresh and dry shoot weights were significantly higher at low concentrations (e.g. 0.1 g/L) than at high concentrations (e.g. 5.0 g/L). The same is true for the soluble protein content. On the contrary, contents of malondialdehyde, proline and omethoate, and activities of superoxide dismutase, peroxidase and ascorbate peroxidase in shoots increased linearly with increasing concentration of omethoate and with exposure time as well. However, catalase activity was increased dramatically at 0.1 g/L but sharply decreased by omethoate added at 1.0 g/L and above compared with that of the control. Taken together, these results support our hypothesis that antioxidative defense response is an important component of plant responses to omethoate and oxidative damage is the major cause for growth reduction of wheat exposed to higher concentrations of omethoate

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