Abscisic Acid Receptors Modulate Metabolite Levels and Phenotype in Arabidopsis Under Normal Growing Conditions

文献类型： 外文期刊

第一作者： Li, Xiaoyi

作者： Li, Xiaoyi;Qiu, Yao;Wang, Tao;Zhou, Qin;Zhang, Qian;Liu, Zhibin;Wu, Lintao;Zhang, Wei

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关键词： Abscisic acid (ABA); ABA receptors; ABA signaling; plant growth; metabolite profile

期刊名称：METABOLITES （ 影响因子：4.932； 五年影响因子：4.98 ）

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年卷期： 2019 年 9 卷 11 期

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收录情况： SCI

摘要： Abscisic acid (ABA) is a vital phytohormone that accumulates in response to various biotic and abiotic stresses, as well as plant growth. In Arabidopsis thaliana, there are 14 members of the ABA receptor family, which are key positive regulators involved in ABA signaling. Besides reduced drought stress tolerance, the quadruple and sextuple mutants (pyr1pyl1pyl2pyl4 (1124) and pyr1pyl1pyl2pyl4pyl5pyl8 (112458) show abnormal growth phenotypes, such as decreases in yield and height, under non-stress conditions. However, it remains unknown whether ABA receptors mediate ABA signaling to regulate plant growth and development. Here, we showed the primary metabolite profiles of 1124, 112458 and wild-type (WT) plants grown under normal conditions. The metabolic changes were significantly different between ABA receptor mutants and WT. Guanosine, for the biosynthesis of cyclic guanosine 3 ',5 '-monophosphate (cGMP), is an important second messenger that acts to regulate the level of ABA. In addition, other amino acids were increased in the 112458 mutant, including proline. These results, together with phenotype analysis, indicated that ABA receptors are involved in ABA signaling to modulate metabolism and plant growth under normal conditions.

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