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https://hdl.handle.net/2440/133779
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Type: | Journal article |
Title: | GABA signalling modulates stomatal opening to enhance plant water use efficiency and drought resilience |
Author: | Xu, B. Long, Y. Feng, X. Zhu, X. Sai, N. Chirkova, L. Betts, A. Herrmann, J. Edwards, E.J. Okamoto, M. Hedrich, R. Gilliham, M. |
Citation: | Nature Communications, 2021; 12(1):1952-1-1952-13 |
Publisher: | Springer Nature |
Issue Date: | 2021 |
ISSN: | 2041-1723 2041-1723 |
Statement of Responsibility: | Bo Xu, Yu Long, Xueying Feng, Xujun Zhu, Na Sai, Larissa Chirkova, Annette Betts, Johannes Herrmann, Everard J. Edwards, Mamoru Okamoto, Rainer Hedrich, Matthew Gilliham |
Abstract: | The non-protein amino acid γ-aminobutyric acid (GABA) has been proposed to be an ancient messenger for cellular communication conserved across biological kingdoms. GABA has well-defined signalling roles in animals; however, whilst GABA accumulates in plants under stress it has not been determined if, how, where and when GABA acts as an endogenous plant signalling molecule. Here, we establish endogenous GABA as a bona fide plant signal, acting via a mechanism not found in animals. Using Arabidopsis thaliana, we show guard cell GABA production is necessary and sufficient to reduce stomatal opening and transpirational water loss, which improves water use efficiency and drought tolerance, via negative regulation of a stomatal guard cell tonoplast-localised anion transporter. We find GABA modulation of stomata occurs in multiple plants, including dicot and monocot crops. This study highlights a role for GABA metabolism in fine tuning physiology and opens alternative avenues for improving plant stress resilience. |
Keywords: | Plant stomata |
Rights: | © The Author(s) 2021. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
DOI: | 10.1038/s41467-021-21694-3 |
Grant ID: | http://purl.org/au-research/grants/arc/DP170104384 http://purl.org/au-research/grants/arc/DP210102828 http://purl.org/au-research/grants/arc/CE140100008 |
Published version: | http://dx.doi.org/10.1038/s41467-021-21694-3 |
Appears in Collections: | Agriculture, Food and Wine publications |
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hdl_133779.pdf | Published version | 6.35 MB | Adobe PDF | View/Open |
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