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Calcium Efflux as a Component of the Hypersensitive Response of Nicotiana benthamiana to Pseudomonas syringae

journal contribution
posted on 2023-05-16, 21:01 authored by Nemchinov, LG, Svetlana ShabalaSvetlana Shabala, Sergey ShabalaSergey Shabala
Using a model plant Nicotiana benthamiana, we have demonstrated that initial calcium uptake in response to the HR (hypersensitive response)-causing pathogen Pseudomonas syringae pv syringae 61 is followed by net calcium efflux initiated at about 12 h after the bacterial challenge and sustained for at least 48 h. Our data suggest that calcium not only acts as an important second messenger in the activation of resistance responses but may also be a downstream mediator of later cell death acceleration and completion of the defense reaction. Accordingly, we propose that the existing model of HR should be amended to include a PM Ca2+ ATP pump as an important component of the HR to pathogens in plants. © The Author 2007. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved.

History

Publication title

Plant and Cell Physiology

Volume

49

Pagination

40-46

ISSN

0032-0781

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Oxford University Press

Place of publication

United Kingdom, Japan

Repository Status

  • Restricted

Socio-economic Objectives

Food safety

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