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ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis

The phytohormone abscisic acid (ABA) regulates plant growth, the developmental process, and abiotic stresses. ABA signaling is induced in response to mediate plant acclimation to environmental challenges, including high salinity and drought. The ABA-binding receptors (RCAR/PYR1/PYL), composing of 14...

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Autores principales: Li, Xiaoyi, Li, Gaoming, Li, Ying, Kong, Xiangge, Zhang, Liang, Wang, Jianmei, Li, Xufeng, Yang, Yi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073838/
https://www.ncbi.nlm.nih.gov/pubmed/30004422
http://dx.doi.org/10.3390/ijms19071938
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author Li, Xiaoyi
Li, Gaoming
Li, Ying
Kong, Xiangge
Zhang, Liang
Wang, Jianmei
Li, Xufeng
Yang, Yi
author_facet Li, Xiaoyi
Li, Gaoming
Li, Ying
Kong, Xiangge
Zhang, Liang
Wang, Jianmei
Li, Xufeng
Yang, Yi
author_sort Li, Xiaoyi
collection PubMed
description The phytohormone abscisic acid (ABA) regulates plant growth, the developmental process, and abiotic stresses. ABA signaling is induced in response to mediate plant acclimation to environmental challenges, including high salinity and drought. The ABA-binding receptors (RCAR/PYR1/PYL), composing of 14 members, are the core components of the ABA-signaling pathway. Here, we observed that the three subfamilies within the RCARs showed different expression patterns at the basal and exogenous ABA levels. Subsequently, we generated transgenic plants overexpressing subfamily III, RCAR11–RCAR14, respectively. The transgenic plants showed increased ABA sensitivity in seed germination and post-germination seedling establishment and root length. Further studies revealed that the overexpressing subfamily III transgenic plants enhanced drought resistance, increased water-use efficiency, and accelerated stress-responsive gene expression compared with the wild-type plants. These findings confirm that the subfamily III plays a key role in ABA-mediated developmental processes and, more importantly, is involved in drought tolerance in the ABA-dependent pathway.
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spelling pubmed-60738382018-08-13 ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis Li, Xiaoyi Li, Gaoming Li, Ying Kong, Xiangge Zhang, Liang Wang, Jianmei Li, Xufeng Yang, Yi Int J Mol Sci Article The phytohormone abscisic acid (ABA) regulates plant growth, the developmental process, and abiotic stresses. ABA signaling is induced in response to mediate plant acclimation to environmental challenges, including high salinity and drought. The ABA-binding receptors (RCAR/PYR1/PYL), composing of 14 members, are the core components of the ABA-signaling pathway. Here, we observed that the three subfamilies within the RCARs showed different expression patterns at the basal and exogenous ABA levels. Subsequently, we generated transgenic plants overexpressing subfamily III, RCAR11–RCAR14, respectively. The transgenic plants showed increased ABA sensitivity in seed germination and post-germination seedling establishment and root length. Further studies revealed that the overexpressing subfamily III transgenic plants enhanced drought resistance, increased water-use efficiency, and accelerated stress-responsive gene expression compared with the wild-type plants. These findings confirm that the subfamily III plays a key role in ABA-mediated developmental processes and, more importantly, is involved in drought tolerance in the ABA-dependent pathway. MDPI 2018-07-02 /pmc/articles/PMC6073838/ /pubmed/30004422 http://dx.doi.org/10.3390/ijms19071938 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Xiaoyi
Li, Gaoming
Li, Ying
Kong, Xiangge
Zhang, Liang
Wang, Jianmei
Li, Xufeng
Yang, Yi
ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title_full ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title_fullStr ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title_full_unstemmed ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title_short ABA Receptor Subfamily III Enhances Abscisic Acid Sensitivity and Improves the Drought Tolerance of Arabidopsis
title_sort aba receptor subfamily iii enhances abscisic acid sensitivity and improves the drought tolerance of arabidopsis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073838/
https://www.ncbi.nlm.nih.gov/pubmed/30004422
http://dx.doi.org/10.3390/ijms19071938
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