GLUTAMATE RECEPTOR-LIKE genes mediate leaf-to-leaf wound signalling

Seyed A. R. Mousavi, Adeline Chauvin, François Pascaud, Stephan Kellenberger and Edward E. Farmer ()
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Seyed A. R. Mousavi: University of Lausanne, Biophore, CH-1015 Lausanne, Switzerland
Adeline Chauvin: School of Pharmaceutical Sciences, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
François Pascaud: University of Lausanne, Rue du Bugnon 27, CH-1005 Lausanne, Switzerland
Stephan Kellenberger: University of Lausanne, Rue du Bugnon 27, CH-1005 Lausanne, Switzerland
Edward E. Farmer: University of Lausanne, Biophore, CH-1015 Lausanne, Switzerland

Nature, 2013, vol. 500, issue 7463, 422-426

Abstract: Abstract Wounded leaves communicate their damage status to one another through a poorly understood process of long-distance signalling. This stimulates the distal production of jasmonates, potent regulators of defence responses. Using non-invasive electrodes we mapped surface potential changes in Arabidopsis thaliana after wounding leaf eight and found that membrane depolarizations correlated with jasmonate signalling domains in undamaged leaves. Furthermore, current injection elicited jasmonoyl-isoleucine accumulation, resulting in a transcriptome enriched in RNAs encoding key jasmonate signalling regulators. From among 34 screened membrane protein mutant lines, mutations in several clade 3 GLUTAMATE RECEPTOR-LIKE genes (GLRs 3.2, 3.3 and 3.6) attenuated wound-induced surface potential changes. Jasmonate-response gene expression in leaves distal to wounds was reduced in a glr3.3 glr3.6 double mutant. This work provides a genetic basis for investigating mechanisms of long-distance wound signalling in plants and indicates that plant genes related to those important for synaptic activity in animals function in organ-to-organ wound signalling.

Date: 2013
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DOI: 10.1038/nature12478

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