期刊
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
卷 72, 期 4-6, 页码 128-133出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pmpp.2008.07.002
关键词
Vitis vinifera L.; Erysiphe necator; Powdery mildew; Phytoalexins; Stilbenes; Viniferins; Resistance; Appressorium; Infection site
资金
- National Center of Competence in Research (NCCR)
Stilbene phytoalexins are identified as defence response in pathogen-grapevine interactions, but little information is available on the role of stilbenes on Erysiphe necator, causal agent of grapevine powdery mildew. Analysis of stilbenes in artificially infected leaf discs from susceptible to highly resistant cultivars was performed and compared to the development of the pathogen. Results indicate that stilbene synthesis is confined in infected cells, penetrated by an appressorium-peg. Stilbene amounts expressed by infection site allow discriminating susceptible and resistant cultivars. Highest viniferins concentrations on resistant cultivars are in correspondence with the observed inhibition of the pathogen growth. The analysis of stilbenes at the infection site and viniferins accumulation in grapevine defence reaction is discussed. (C) 2008 Elsevier Ltd. All rights reserved.
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