Polypeptide metabolites secreted by the fungal pathogen Eutypa lata participate in Vitis vinifera cell structure damage observed in Eutypa dieback

Functional Plant Biology : FPB
Stéphane OctavePierrette Fleurat-Lessard

Abstract

Eutypa dieback is a devastating disease of Vitis vinifera L. caused by the fungal pathogen Eutypa lata. This wood-inhabiting fungus degrades tissues in the trunk and cordons of infected vines and induces symptoms in the foliage. These symptoms have been attributed to the production of toxic metabolites by the pathogen, in particular eutypine. Recently, we have isolated polypeptide compounds secreted by the fungus in artificial culture. The aims of this study were to examine the effects induced in leaves by applying polypeptides and eutypine to detached canes and to compare this to the changes in leaf structure induced by E. lata in the vineyard. In leaves taken from vines infected with E. lata, the changes in mesophyll cells indicate that the fungus has an effect on tissue remote from the infected area. The size of mesophyll cells decreased by more than half, starch content was reduced and tannins were abundant. Plastids, mitochondria and cell walls were highly modified. In leaves taken from healthy canes treated with polypeptides of E. lata, the structure of mesophyll cells was also modified. The cell size did not change, but the tannin content increased and modifications in plastids and mitochondria were similar to those obse...Continue Reading

References

Jan 3, 1978·Biochimica Et Biophysica Acta·G StrobelP Albersheim
Oct 15, 1996·Archives of Biochemistry and Biophysics·C DeswarteJ Fallot
Dec 1, 2001·Microbiology and Molecular Biology Reviews : MMBR·R P de Vries, J Visser
Mar 7, 2002·Journal of Agricultural and Food Chemistry·Russell J MolyneuxNancy Irelan
Aug 29, 2003·Phytochemistry·Noreen MahoneyThomas K Schoch
Oct 13, 2005·Journal of Agricultural and Food Chemistry·Noreen MahoneyW Douglas Gubler
Sep 1, 2003·Molecular Plant Pathology·Antonio Di PietroM Isabel G Roncero
Jul 1, 2005·Functional Plant Biology : FPB·Jérome RudellePierrette Fleurat-Lessard

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Citations

Mar 1, 2009·Functional Plant Biology : FPB·Christophe ValtaudAndrée Bourbouloux
Aug 1, 2007·Functional Plant Biology : FPB·Fabio RaimondoMaria Assunta Lo Gullo
Jan 27, 2018·Journal of Fungi·Cédric MoisyJean-Pierre Péros
Apr 1, 2014·Plant Disease·Philippe E RolshausenWayne F Wilcox
Sep 15, 2009·Comptes rendus biologies·Philippe LarignonChristophe Bertsch

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Methods Mentioned

BETA
light
transmission electron microscopy
light microscopy

Software Mentioned

PATAG

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