Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat

doi:10.1016/S2095-3119(13)60556-0

Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (8): 1441-1449.DOI: 10.1016/S2095-3119(13)60556-0

Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat

BAI Jian-hui, LIU Jing-hui, ZHANG Na, YANG Jun-heng, SA Ru-la , WU Lan

1.Science Innovation Team of Oat, Inner Mongolia Agricultural University, Hohoot 010019, P.R.China
2.College of Foreign Languages, Inner Mongolia Agricultural University, Hohoot 010019, P.R.China

收稿日期:2012-07-30 出版日期:2013-08-01 发布日期:2013-09-12
通讯作者: Correspondence LIU Jing-hui, Mobile: 13848150459, E-mail: cauljh@163.com
作者简介:BAI Jian-hui, E-mail: bzmayyb@163.com
基金资助:
This research was supported by the National Natural Science Foundation of China (31060174, 30660084), the Natural Science Foundation of Inner Mongolia, China (2010ZD07, 200607010301), the Technology System of Agricultural Industry of China (CARS-08-B-5), and the Item of Science Innovation Team of Inner Mongolia Agricultural University (NDTD2010-8). We thank Dr. Yan Weikai in Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food in Canada and Dr. Xu Jin in the Agricultural Resource Center, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, for their useful suggestions on this paper.

Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat

BAI Jian-hui, LIU Jing-hui, ZHANG Na, YANG Jun-heng, SA Ru-la , WU Lan

1.Science Innovation Team of Oat, Inner Mongolia Agricultural University, Hohoot 010019, P.R.China
2.College of Foreign Languages, Inner Mongolia Agricultural University, Hohoot 010019, P.R.China

Received:2012-07-30 Online:2013-08-01 Published:2013-09-12
Contact: Correspondence LIU Jing-hui, Mobile: 13848150459, E-mail: cauljh@163.com
About author:BAI Jian-hui, E-mail: bzmayyb@163.com
Supported by:
This research was supported by the National Natural Science Foundation of China (31060174, 30660084), the Natural Science Foundation of Inner Mongolia, China (2010ZD07, 200607010301), the Technology System of Agricultural Industry of China (CARS-08-B-5), and the Item of Science Innovation Team of Inner Mongolia Agricultural University (NDTD2010-8). We thank Dr. Yan Weikai in Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food in Canada and Dr. Xu Jin in the Agricultural Resource Center, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, for their useful suggestions on this paper.

摘要/Abstract

摘要： Alkali stress can cause severe crop damage and reduce production. However, physiological processes involved in alkali stress in oat seedlings are not well understood. In this study, physiological responses and yield of oat to alkali stress were studied using the alkali-tolerant oat genotype Vao-9 and the alkali-sensitive oat genotype Baiyan 5. The results were: (i) low concentrations of alkali stress (25 and 50 mmol L-1) significantly reduced the yield and grain weight while increased the oat grain number per spike. A negative correlation between yield and malondialdehyde (MDA) content at the jointing and grain filling stages and positive correlations between yield on one hand and superoxide dismutase (SOD), and peroxidase (POD) activities on the other at the jointing stage were observed. There was a positive correlation between MDA and soluble sugar at the grain filling stage; (ii) soluble sugar content was increased at the jointing and grain filling stages and decreased at the heading stage by alkali stress; (iii) alkali stress increased the SOD activity during the heading and grain filling stages, and increased the POD activity at the heading stage. As compared to the control, the increase of MDA contents in alkali-treated oat was observed, during the jointing, heading and grain filling stages; (iv) under alkali stress, the oat genotype Vao-9 showed higher antioxidant enzyme activity and lower soluble sugar contents during the heading stage, and lower MDA contents than those in the oat genotype Baiyan 5 under alkali stress. The result suggested that the high ROS scavenging capacity and soluble sugar levels might play roles in oat response to alkali stress.

关键词: oat , alkali stress , MDA , soluble sugar , antioxidant enzyme , yield

Abstract: Alkali stress can cause severe crop damage and reduce production. However, physiological processes involved in alkali stress in oat seedlings are not well understood. In this study, physiological responses and yield of oat to alkali stress were studied using the alkali-tolerant oat genotype Vao-9 and the alkali-sensitive oat genotype Baiyan 5. The results were: (i) low concentrations of alkali stress (25 and 50 mmol L-1) significantly reduced the yield and grain weight while increased the oat grain number per spike. A negative correlation between yield and malondialdehyde (MDA) content at the jointing and grain filling stages and positive correlations between yield on one hand and superoxide dismutase (SOD), and peroxidase (POD) activities on the other at the jointing stage were observed. There was a positive correlation between MDA and soluble sugar at the grain filling stage; (ii) soluble sugar content was increased at the jointing and grain filling stages and decreased at the heading stage by alkali stress; (iii) alkali stress increased the SOD activity during the heading and grain filling stages, and increased the POD activity at the heading stage. As compared to the control, the increase of MDA contents in alkali-treated oat was observed, during the jointing, heading and grain filling stages; (iv) under alkali stress, the oat genotype Vao-9 showed higher antioxidant enzyme activity and lower soluble sugar contents during the heading stage, and lower MDA contents than those in the oat genotype Baiyan 5 under alkali stress. The result suggested that the high ROS scavenging capacity and soluble sugar levels might play roles in oat response to alkali stress.

Key words: oat , alkali stress , MDA , soluble sugar , antioxidant enzyme , yield

BAI Jian-hui, LIU Jing-hui, ZHANG Na, YANG Jun-heng, SA Ru-la , WU Lan. Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat[J]. Journal of Integrative Agriculture, 2013, 12(8): 1441-1449.

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Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat

Effect of Alkali Stress on Soluble Sugar, Antioxidant Enzymes and Yield of Oat

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