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Effects of water-saving superabsorbent polymer on antioxidant enzyme activities and lipid peroxidation in oat (Avena sativa L.) under drought stress

文献类型： 外文期刊

作者： Islam, M. Robiul 1 ; Xue, Xuzhang 2 ; Mao, Sishuai 1 ; Ren, Changzhong 1 ; Eneji, A. Egrinya 5 ; Hu, Yuegao 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China

2.Natl Res Ctr Intelligent Agr Equipments, Beijing 100097, Peoples R China

3.Rajshahi Univ, Dept Agron & Agr Extens, Rajshahi 6205, Bangladesh

4.Baicheng Acad Agr Sci, Baicheng 137000, Jilin Province, Peoples R China

5.Univ Calabar, Dept Soil Sci, Calabar, Nigeria

关键词： oat; drought stress; auto irrigation; superabsorbent polymer; antioxidant enzymes

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.638； 五年影响因子：3.802 ）

ISSN： 0022-5142

年卷期： 2011 年 91 卷 4 期

页码：

收录情况： SCI

摘要： BACKGROUND: Drought stress significantly limits oat (Avena sativa L.) growth and productivity. Thus an efficient management of soil moisture and study of metabolic changes in response to drought are important for improved production of oat. The objective was to gain a better understanding of drought tolerance mechanisms and improve soil water management strategies using water-saving superabsorbent polymer (SAP) at 60 kg ha(-1) under three irrigation levels (adequate, moderate and deficit) using a new type of hydraulic pressure-controlled auto irrigator. RESULTS: The results showed that the relative water content and leaf water potential (psi(1)) were much higher in oats treated with SAP. Although the SAP had little effect on plant biomass accumulation under adequate and moderate irrigation, it significantly increased the biomass by 52.7% under deficit irrigation. Plants treated with SAP under deficit irrigation showed a significant decrease in superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase activities in leaves compared with control plants. CONCLUSION: Our results suggested that drought stress leads to production of oxygen radicals, which results in increased lipid peroxidation and oxidative stress in the plant, and the application of SAP could conserve soil water, making same available to plants for increased biomass accumulation and reduced oxidative stress especially under severe water stress. (C) 2010 Society of Chemical Industry

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