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United States Department of Agriculture

Agricultural Research Service

Research Project: Epidemiology and Management of Pierce's Disease and Other Maladies of Grape

Location: Crop Diseases, Pests and Genetics

Title: Effects of grapevine sap phenolics on the in vitro growth of Xylella fastidiosa

Authors
item Wallis, Christopher
item Wallingford, Anna

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: May 13, 2013
Publication Date: June 1, 2013
Citation: Wallis, C.M., Wallingford, A.K. 2013. Effects of grapevine sap phenolics on the in vitro growth of Xylella fastidiosa. American Phytopathological Society Abstracts. 103(S2):154.

Technical Abstract: Pierce’s disease, caused by the bacterium Xylella fastidiosa, poses a serious threat to grape production in the United States. Previous work indicated that grapevines infected with Xylella fastidiosa respond by producing greater levels of phenolic compounds in xylem sap and tissues, presumably to limit bacterial growth. This study examined the ability of xylem sap phenolics, such as procyanidins and coumaric acid derivatives, to affect Xylella fastidiosa growth in vitro. Concentrations of phenolics evaluated were similar to levels detected in both non-infected and infected grapevines. The ability of phenolic compounds to affect aggregation of Xylella fastidiosa also was observed. These results increase knowledge about the role of host-produced phenolics on Xylella fastidiosa colonization within its grapevine hosts.

Last Modified: 7/22/2014