TITLE

Ultrastructure of pit membrane dissolution and movement of Xylella fastidiosa through pit membranes in petioles of Vitis vinifera

AUTHOR(S)
Ellis, E. Ann; McEachern, George Ray; Clark, Samantha; Cobb, B. Greg
PUB. DATE
June 2010
SOURCE
Botany;Jun2010, Vol. 88 Issue 6, p596
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Xylella fastidiosa is the causative agent in Pierce’s disease (PD) in Vitis vinifera L. (grape) vines. Xylella fastidiosa colonizes and disseminates itself from one xylem element to another by dissolution and breach of pit membranes. These studies on naturally infected V. vinifera grown under vineyard conditions document by transmission electron microscopy that there is dissolution and breach of pit membranes by X. fastidiosa in vertical and lateral colonization in PD. These processes were documented in two cultivars of V. vinifera: ‘Syrah’ and ‘Cabernet Sauvignon.’ Le Xylella fastidiosa cause la maladie de Pierce (PD) chez la vigne (Vitis vinifera L.). Le X. fastidiosa colonise et se dissémine d'un élément de xylème à l'autre en dissolvant et contournant les membranes de ponctuation. L'observation en microscopie électronique par transmission, pratiquée sur des plants de V. vinifera naturellement infectés en vignoble, montre qu'il y a dissolution de la membrane de ponctuation et son contournement par le X. fastidiosa, lors de colonisations verticales et latérales par la maladie de Pierce (PD). L'auteur a observé ces processus chez deux cultvars de V. vinifera : ‘Syrah’ et ‘Cabernet Sauvignon.’
ACCESSION #
51991066

 

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