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

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Huot, B; Castroverde, CDM; Velásquez, AC; Hubbard, E; Pulman, JA; Yao, J; Childs, KL; Tsuda, K; Montgomery, BL; He, SY

Published Date

  • November 27, 2017

Published In

Volume / Issue

  • 8 / 1

Start / End Page

  • 1808 -

PubMed ID

  • 29180698

Pubmed Central ID

  • 29180698

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/s41467-017-01674-2

Language

  • eng