Systemic effects on leaf glutathione metabolism and defence protein expression caused by esca infection in grapevines

Functional Plant Biology : FPB
Christophe ValtaudAndrée Bourbouloux

Abstract

Esca is a devastating disease of Vitis vinifera L., caused by fungal pathogen(s) inhabiting the wood. The pathogens induce symptoms in the foliage, which are associated with structural and biochemical changes in leaves. The present study was undertaken to examine the effects of the disease on leaf glutathione metabolism in field-grown plants. The glutathione pool decreased and defence proteins such as PR-proteins and chitinases were expressed in the leaves before the appearance of visible symptoms in esca-infected canes. Glutathione depletion was increased as the disease developed in the leaves. The ratio of glutathione disulfide (GSSG) to the total glutathione pool was slightly decreased in leaves without visible symptoms, but it was significantly increased as the disease progressed. The abundance of γ-glutamylcysteine synthetase (γ-ECS) transcripts and of γ-ECS protein was greatly decreased in leaves exhibiting esca symptoms. Although glutathione reductase and glutathione peroxidase transcripts were largely unchanged by the spread of the esca disease, leaf glutathione S-transferase (GST) activities, the amounts of mRNAs encoding GSTU1 and GSTF2 and the abundance of the GSTU1 and GSTF2 proteins were highest at the early stages...Continue Reading

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Citations

Jan 29, 2019·Frontiers in Plant Science·Florian MoretMarielle Adrian
Sep 30, 2010·The Biochemical Journal·Pedro Diaz VivancosChristine H Foyer
Dec 6, 2011·Journal of Experimental Botany·Amélie SaumonneauRossitza Atanassova
Apr 15, 2014·Phytopathology·Alessandro SpagnoloFlorence Fontaine
Aug 26, 2017·Molecular Plant-microbe Interactions : MPMI·Maryline Magnin-RobertFlorence Fontaine
Nov 1, 2011·Functional Plant Biology : FPB·Maryline Magnin-RobertFlorence Fontaine
Jan 10, 2019·Frontiers in Plant Science·Gábor GullnerPeter Schröder

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