Susceptibilidad a "Plasmopara viticola" (Berk. & Curt.) Berl. & de Toni, en diferentes variedades de vid ("Vitis vinifera" L.)
[EN] Downy mildew, caused by the obligate oomycete Plasmopara viticola (Berk. & Curt.) Berl. & de Toni., is one of the most destructive grapevine diseases occurring worldwide. The aim of the present study was to examine susceptibility to infection by P. viticola in different grapevine variet...
| Authors: | , , , , |
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| Format: | article |
| Publication Date: | 2008 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/45412 |
| Online Access: | http://hdl.handle.net/10261/45412 |
| Access Level: | Open access |
| Keyword: | Spp Vitis Resistencia Severidad Incidencia Esporulación Resistance Disease severity Disease incidence Sporulation |
| Summary: | [EN] Downy mildew, caused by the obligate oomycete Plasmopara viticola (Berk. & Curt.) Berl. & de Toni., is one of the most destructive grapevine diseases occurring worldwide. The aim of the present study was to examine susceptibility to infection by P. viticola in different grapevine varieties grown in European vineyards. Five cultivars of V. vinifera L. known to be susceptible (Albariño, Tempranillo, Touriga Nacional, Riesling and Cabernet Sauvignon), and one Vitis genotypes known to be resistant (V. rupestris) were examined. Plants were inoculated with P. viticola in the laboratory using the leaf disc and plant techniques. The obtained results demonstrated, that there were 3 groups: one formed by those little susceptible, e.g., cvs. Cabernet Sauvignon and Riesling; and a second group formed by those very susceptible, cvs. Albariño, Touriga Nacional and Tempranillo, and a third group of more resistant genotype (V. rupestris). Furthermore, the course of colonization of leaf mesophyll by P. viticola was described in these varieties, both spatial and temporary level, making a monitoring through microscopic epifluorescence, from its penetration to the formation of the substomatic vesicle, and later formation sporangiophores. |
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