Dual impact of elevated temperature on plant defence and bacterial virulence in Arabidopsis

Huot, Bethany, Castroverde, Christian Danve M, Velasquez, Andre C, Hubbard, Emily, Pulman, Jane A, Yao, Jian, Childs, Kevin L, Tsuda, Kenichi, Montgomery, Beronda L and He, Sheng Yang (2017) Dual impact of elevated temperature on plant defence and bacterial virulence in Arabidopsis. NATURE COMMUNICATIONS, 8 (1). 1808-.

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Official URL: http://dx.doi.org/10.1038/s41467-017-01674-2

Abstract

Environmental conditions profoundly affect plant disease development; however, the underlying molecular bases are not well understood. Here we show that elevated temperature significantly increases the susceptibility of Arabidopsis to Pseudomonas syringae pv. tomato (Pst) DC3000 independently of the phyB/PIF thermosensing pathway. Instead, elevated temperature promotes translocation of bacterial effector proteins into plant cells and causes a loss of ICS1-mediated salicylic acid (SA) biosynthesis. Global transcriptome analysis reveals a major temperature-sensitive node of SA signalling, impacting ~60% of benzothiadiazole (BTH)-regulated genes, including ICS1 and the canonical SA marker gene, PR1. Remarkably, BTH can effectively protect Arabidopsis against Pst DC3000 infection at elevated temperature despite the lack of ICS1 and PR1 expression. Our results highlight the broad impact of a major climate condition on the enigmatic molecular interplay between temperature, SA defence and function of a central bacterial virulence system in the context of a widely studied susceptible plant-pathogen interaction.

Item Type:	Article
Uncontrolled Keywords:	Pseudomonas syringae, Plants, Genetically Modified, Arabidopsis, Salicylic Acid, Abscisic Acid, Intramolecular Transferases, Bacterial Proteins, Arabidopsis Proteins, Gene Expression Profiling, Climate, Virulence, Signal Transduction, Plant Diseases, Protein Transport, Phytochrome B, Host-Pathogen Interactions, Hot Temperature, Disease Resistance
Depositing User:	Symplectic Admin
Date Deposited:	12 Feb 2019 10:28
Last Modified:	19 Jan 2023 01:04
DOI:	10.1038/s41467-017-01674-2
Open Access URL:	https://doi.org/10.1038/s41467-017-01674-2
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3032709