Publication details

Plasma membrane order and fluidity are diversely triggered by elicitors of plant defence

Authors

SÁNDOR Roman DER Christophe GROSJEAN Kevin ANCA Iulia NOIROT Elodie LEBORGNE-CASTEL Nathalie LOCHMAN Jan SIMON-PLAS Francoise GERBEAU-PISSOT Patricia

Year of publication 2016
Type Article in Periodical
Magazine / Source Journal of Experimental Botany
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1093/jxb/erw284
Field Biochemistry
Keywords Cryptogein mutants; elicitors; fluidity; membrane order; plant defence; plasma membrane; reactive oxygen species; signalling
Description Although plants are exposed to a great number of pathogens, they usually defend themselves by triggering mechanisms able to limit disease development. Alongside signalling events common to most such incompatible interactions, modifications of plasma membrane (PM) physical properties could be new players in the cell transduction cascade. Different pairs of elicitors (cryptogein, oligogalacturonides, and flagellin) and plant cells (tobacco and Arabidopsis) were used to address the issue of possible modifications of plant PM biophysical properties induced by elicitors and their links to other events of the defence signalling cascade. We observed an increase of PM order whatever the elicitor/plant cell pair used, provided that a signalling cascade was induced. Such membrane modification is dependent on the NADPH oxidase-mediated reactive oxygen species production. Moreover, cryptogein, which is the sole elicitor able to trap sterols, is also the only one able to trigger an increase in PM fluidity. The use of cryptogein variants with altered sterol-binding properties confirms the strong correlation between sterol removal from the PM and PM fluidity enhancement. These results propose PM dynamics as a player in early signalling processes triggered by elicitors of plant defence.
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