Coronatine inhibits stomatal closure and delays hypersensitive response cell death induced by nonhost bacterial pathogens | Zendy

Seonghee Lee | Zendy; Yasuhiro Ishiga | Zendy; Kristen Clermont | Zendy; Kirankumar S. Mysore | Zendy

Open Access

Coronatine inhibits stomatal closure and delays hypersensitive response cell death induced by nonhost bacterial pathogens

Author(s) -

Seonghee Lee,

Yasuhiro Ishiga,

Kristen Clermont,

Kirankumar S. Mysore

Publication year - 2013

Publication title -

peerj

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.927

H-Index - 70

ISSN - 2167-8359

DOI - 10.7717/peerj.34

Subject(s) - pseudomonas syringae , coronatine , phytotoxin , jasmonic acid , hypersensitive response , biology , pathogen , plant defense against herbivory , microbiology and biotechnology , botany , arabidopsis , defence mechanisms , systemic acquired resistance , plant disease resistance , gene , toxin , genetics , mutant

Pseudomonas syringae is the most widespread bacterial pathogen in plants. Several strains of P. syringae produce a phytotoxin, coronatine (COR), which acts as a jasmonic acid mimic and inhibits plant defense responses and contributes to disease symptom development. In this study, we found that COR inhibits early defense responses during nonhost disease resistance. Stomatal closure induced by a nonhost pathogen, P. syringae pv. tabaci , was disrupted by COR in tomato epidermal peels. In addition, nonhost HR cell death triggered by P. syringae pv. tabaci on tomato was remarkably delayed when COR was supplemented along with P. syringae pv. tabaci inoculation. Using isochorismate synthase (ICS)-silenced tomato plants and transcript profiles of genes in SA- and JA-related defense pathways, we show that COR suppresses SA-mediated defense during nonhost resistance.

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