English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/88389
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Pythium recalcitrans sp. nov. revealed by multigene phylogenetic analysis

AuthorsMoralejo, Eduardo ; Clemente, Antonio; Descals, Enric ; Belbahri, Lassaad; Calmin, Gautier; Lefort, François; Spies, Chris F.J.; McLeod, Adele
Issue Date2008
PublisherMycological Society of America
CitationMycologia 100(2): 310-319 (2008)
AbstractA new species of Pythium collected from grapevine roots (Vitis vinifera) in South Africa and roots of common beet (Beta vulgaris) in Majorca, Spain, is described. The phylogenetic position of the new species was investigated by multigene sequence analyses of the internal transcribed spacers (ITS1 and ITS2) of the rDNA region, as well as three other nuclear and three mitochondrial coding genes. Maximum likelihood phylogenetic analyses based on ITS rDNA and concatenated β-tubulin and cytrochrome c oxidase II alignment place Pythium recalcitrans together with P. sylvaticum and P. intermedium. Pythium recalcitrans sp. nov. is morphologically almost indistinguishable from other Pythium species that only form hyphal swellings in culture. However its species status is justified by the distinc-tiveness of the DNA sequences in all the genes examined. In culture P. recalcitrans exhibits fast radial growth, abundant spherical to subglobose hyphal swellings but produces no zoosporangia. Sexual structures are not seen in agar media but form in autoclaved grass blades floated on water. Multiple antheridia (1-7) are encountered with most of them diclinous and crook-necked. Oospores are thin-walled and either aplerotic or plerotic. P. recalcitrans was pathogenic to seedlings of Beta vulgaris and Solanum lycopersicum. © 2008 by The Mycological Society of America.
Publisher version (URL)http://dx.doi.org/10.3852/mycologia.100.2.310
Identifiersdoi: 10.3852/mycologia.100.2.310
issn: 0027-5514
e-issn: 1557-2536
Appears in Collections:(IMEDEA) Artículos
Files in This Item:
File Description SizeFormat 
Moralejo-Mycologia-2008-v100-n2-p310.pdf732,64 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.