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Open AccessArticle

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

by Xiaoyi Li 1,†, Lintao Wu 2,†, Yao Qiu 1, Tao Wang 1, Qin Zhou 1, Qian Zhang 1, Wei Zhang 3 and Zhibin Liu 1,*
1
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China
2
Rape Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China
3
College of Bioengineering, Sichuan University of Science & Engineering, Zigong 643000, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Metabolites 2019, 9(11), 249; https://doi.org/10.3390/metabo9110249
Received: 2 September 2019 / Revised: 21 October 2019 / Accepted: 23 October 2019 / Published: 24 October 2019
(This article belongs to the Special Issue Plant Metabolomics)
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. View Full-Text
Keywords: Abscisic acid (ABA); ABA receptors; ABA signaling; plant growth; metabolite profile Abscisic acid (ABA); ABA receptors; ABA signaling; plant growth; metabolite profile
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Li, X.; Wu, L.; Qiu, Y.; Wang, T.; Zhou, Q.; Zhang, Q.; Zhang, W.; Liu, Z. Abscisic Acid Receptors Modulate Metabolite Levels and Phenotype in Arabidopsis Under Normal Growing Conditions. Metabolites 2019, 9, 249.

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