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Title

Characterization of resistance mechanisms to powdery mildew (Erysiphe betae) in beet (Beta vulgaris)

AuthorsFernández-Aparicio, Mónica ; Prats, Elena ; Emeran, Amero A.; Rubiales, Diego
KeywordsHypersensitive response
Papilla
Prepenetration resistance
Issue DateApr-2009
PublisherAmerican Phytopathological Society
CitationPhytopathology 99: 385-389 (2009)
AbstractBeet powdery mildew incited by Erysiphe betae is a serious foliar fungal disease of worldwide distribution causing losses of up to 30%. In the present work, we searched for resistance in a germplasm collection of 184 genotypes of Beta vulgaris including fodder (51 genotypes), garden (60 genotypes), leaf (51 genotypes), and sugar (22 genotypes) beet types. Resistant genotypes were identified in the four beet types under study. In addition, mechanisms underlying resistance were dissected through histological studies. These revealed different resistance mechanisms acting at different fungal developmental stages, i.e., penetration resistance, early and late cell death, or posthaustorial resistance. Most genotypes were able to hamper fungal development at several stages. The later are interesting for breeding aiming to resistance durability. Furthermore, characterization of defense mechanisms will be useful for further cellular and molecular studies to unravel the bases of resistance in this species.
Publisher version (URL)http://dx.doi.org/10.1094/PHYTO-99-4-0385
URIhttp://hdl.handle.net/10261/11761
DOI10.1094/PHYTO-99-4-0385
ISSN0031-949X
Appears in Collections:(IAS) Artículos
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