WRKY48 negatively regulates plant acclimation to a combination of high light and heat stress.

Autor: Balfagón D; Department of Biology, Biochemistry and Natural Sciences, Universitat Jaume I, 12071, Castellón, Spain.; Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, Edinburgh, 3H9 3BF, UK., Pascual LS; Department of Biology, Biochemistry and Natural Sciences, Universitat Jaume I, 12071, Castellón, Spain., Sengupta S; St. Jude Children's Research Hospital, Memphis, TN, 38105, USA., Halliday KJ; Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, Edinburgh, 3H9 3BF, UK., Gómez-Cadenas A; Department of Biology, Biochemistry and Natural Sciences, Universitat Jaume I, 12071, Castellón, Spain., Peláez-Vico MÁ; Division of Plant Science and Technology, College of Agriculture Food and Natural Resources, University of Missouri, Columbia, MO, 65211, USA., Sinha R; Division of Plant Science and Technology, College of Agriculture Food and Natural Resources, University of Missouri, Columbia, MO, 65211, USA., Mittler R; Division of Plant Science and Technology, College of Agriculture Food and Natural Resources, University of Missouri, Columbia, MO, 65211, USA., Zandalinas SI; Department of Biology, Biochemistry and Natural Sciences, Universitat Jaume I, 12071, Castellón, Spain.
Jazyk: angličtina
Zdroj: The Plant journal : for cell and molecular biology [Plant J] 2024 Mar; Vol. 117 (6), pp. 1642-1655. Date of Electronic Publication: 2024 Feb 05.
DOI: 10.1111/tpj.16658
Abstrakt: Plants growing under natural conditions experience high light (HL) intensities that are often accompanied by elevated temperatures. These conditions could affect photosynthesis, reduce yield, and negatively impact agricultural productivity. The combination of different abiotic challenges creates a new type of stress for plants by generating complex environmental conditions that often exceed the impact of their individual parts. Transcription factors (TFs) play a key role in integrating the different molecular signals generated by multiple stress conditions, orchestrating the acclimation response of plants to stress. In this study, we show that the TF WRKY48 negatively controls the acclimation of Arabidopsis thaliana plants to a combination of HL and heat stress (HL + HS), and its expression is attenuated by jasmonic acid under HL + HS conditions. Using comparative physiological and transcriptomic analyses between wild-type and wrky48 mutants, we further demonstrate that under control conditions, WRKY48 represses the expression of a set of transcripts that are specifically required for the acclimation of plants to HL + HS, hence its suppression during the HL + HS stress combination contributes to plant survival under these conditions. Accordingly, mutants that lack WRKY48 are more resistant to HL + HS, and transgenic plants that overexpress WRKY48 are more sensitive to it. Taken together, our findings reveal that WRKY48 is a negative regulator of the transcriptomic response of Arabidopsis to HL + HS and provide new insights into the complex regulatory networks of plant acclimation to stress combination.
(© 2024 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: