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Exogenous Gamma-aminobutyric Acid Coordinates Active Oxygen and Amino Acid Homeostasis to Enhance Heat Tolerance in Wheat Seedlings

文献类型： 外文期刊

作者： Wang, Xing 1 ; Wang, Xiaodong 3 ; Peng, Chuanxi 1 ; Shi, Hai 4 ; Yang, Jia 1 ; He, Min 1 ; Zhang, Mingcai 1 ; Zhou, Yuyi; 1 ;

作者机构： 1.China Agr Univ, Minist Educ, Engn Res Ctr Plant Growth Regulator, State Key Lab Plant Physiol & Biochem, 2 Yuanmingyuan Xi Lu, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Agron & Biotechnol, 2 Yuanmingyuan Xi Lu, Beijing 100193, Peoples R China

3.Beijing Res Ctr Intelligent Equipment Agr, Beijing 100089, Peoples R China

4.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China

关键词： Amino acid; Gamma aminobutyric acid; Heat stress; Reactive oxygen species; Wheat

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）

ISSN： 0721-7595

年卷期：

页码：

收录情况： SCI

摘要： Heat stress has detrimental impacts on wheat growth and yield formation. Conferring heat tolerance through applying plant growth regulators is a feasible strategy to reduce loss. Gamma aminobutyric acid (GABA) is a four-carbon non-proteinogenic amino acid existing in organisms and accumulates in response to stress. In this study, spring wheat Liaochun17 and winter wheat Jingdu 40 were used to investigate the function of exogenous GABA on the heat tolerance of wheat seedlings. Data displayed that GABA treatment not only reduced the production of reactive active oxygen (ROS), but also improved the scavenging capacity of diphenyl picryl phenyl hydrazine active oxygen under heat stress, thus alleviating the accumulation of malondialdehyde and the damage of cell membrane. In addition, analysis of protein and amino acids revealed that GABA effectively promoted the accumulation of soluble protein and coordinated amino acid homeostasis. Summarily, our current findings revealed that GABA strengthened the resistance of wheat seedling to heat stress by maintaining the metabolism balance of ROS and amino acids.

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