Vol. 52 No. 2 (2013): 8th IWGTD - Special issue on Grapevine Trunk Diseases
Research Papers

Histopathological study of response of Vitis vinifera cv. Cabernet Sauvignon to bark and wood injury with and without inoculation by Phaeomoniella chlamydospora

Jérôme POUZOULET
Ecole d'Ingénieurs de Purpan, 75, voie du TOEC, 31076 Toulouse
Alban JACQUES
Ecole d'Ingénieurs de Purpan, 75, voie du TOEC, 31076 Toulouse
Xavier BESSON
LVVD, ZA du Landreau, 49610 Mozé sur Louet
Jean DAYDE
Ecole d'Ingénieurs de Purpan, 75, voie du TOEC, 31076 Toulouse
Nathalie MAILHAC
Ecole d'Ingénieurs de Purpan, 75, voie du TOEC, 31076 Toulouse

Published 2013-07-16

Keywords

  • Grapevine vine-trunk disease,
  • Phaeomoniella chlamydospora,
  • CODIT,
  • compartmentalization

How to Cite

[1]
J. POUZOULET, A. JACQUES, X. BESSON, J. DAYDE, and N. MAILHAC, “Histopathological study of response of Vitis vinifera cv. Cabernet Sauvignon to bark and wood injury with and without inoculation by Phaeomoniella chlamydospora”, Phytopathol. Mediterr., vol. 52, no. 2, pp. 313–323, Jul. 2013.

Abstract

Summary. Phaeomoniella chlamydospora (Pch) is one of the main causal agents of tracheomycosis in grapevine. We characterize how this fungus affects the response of Vitis vinifera cv. Cabernet Sauvignon to bark and xylem-tissue wounding after six weeks post-treatment. A histological investigation shows that, in xylem tissue, cell-wall modifications in response to wounding are related to suberin deposits rather than to lignin-induced wall thickening. The xylem response does not appear to be disturbed by Pch infection. Therefore, cell-wall modification strongly inhibits the development of wound-closure tissue (WCT) but does not prevent the differentiation of the necro-phylactic periderm. Hyphae localization in tissue surrounding the wound or inoculation sites indicates that Pch colonizes all cell types, such as vascular tissues, paratracheal parenchyma cells, fibers and rays. The results also suggest that efficient compartmentalization separating fascicular xylem portions is assured by thick suberized cell walls bordering the ray parenchyma.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...