2024-03-28T19:04:19Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/657632018-04-30T13:01:53Zcom_10261_11com_10261_6col_10261_264
DIGITAL.CSIC
author
Gindro, Katia
author
Alonso-Villaverde Iglesias, Virginia
author
Voinesco, Francine
author
Spring, Jean-Laurent
author
Viret, Olivier
author
Dubuis, Pierre-Henri
2013-02-04T09:45:57Z
2013-02-04T09:45:57Z
2012
Plant physiology and biochemistry 52: 140-146 (2012)
http://hdl.handle.net/10261/65763
10.1016/j.plaphy.2011.12.009
Grape clusters of different Vitis genotypes, including Vitis vinifera cvs Chasselas and Merlot, and two interspecific grape varieties, Solaris (cvs. Merzling* x (Saperavi severneyi x Muscat ottonel)) and 2091 (cvs. Gamaret x Bronner), are susceptible or resistant to downy mildew. These cultivars were inoculated with Plasmopara viticola at three developmental stages (BBCH stages 53, 69 and 75). Samples were examined by scanning electron microscopy and the synthesis of stilbenes was measured. Microscopical examinations of pedicels, rachis and calyptras showed important differences in stomatal structures within seasonal development. At BBCH 53, successful infections were observed on all tested cultivars and functional stomata were present, while no infections were observed after this stage. At BBCH 69 and 75, cracks were observed around the stomata and guard cells were unstructured or completely collapsed, leading to closed-like stomata. At BBCH 53, significant stilbene accumulation was quantified in 2091 and Solaris; pterostilbene and ο-viniferin were produced in large amounts. In the susceptible varieties, only piceid and resveratrol were induced. At the other two stages, the concentration of all measured stilbenes was undetectable. The critical roles of seasonal development and stilbenes in the resistance of grape clusters towards downy mildew are discussed. © 2011 Elsevier Masson SAS.
eng
closedAccess
Downy mildew
Cluster
Grapevine
Lenticels
Ontogeny
Resistance
Stilbenes
Stomata
Susceptibility to downy mildew in grape clusters: New microscopical and biochemical insights
artículo
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URL
https://digital.csic.es/bitstream/10261/65763/1/accesoRestringido.pdf
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accesoRestringido.pdf
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https://digital.csic.es/bitstream/10261/65763/5/accesoRestringido.pdf.txt
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accesoRestringido.pdf.txt