Pythium solare sp. nov., a new pathogen of green beans in Spain

A new disease causing wilt and death of adult plants of Phaseolus vulgaris was discovered in plastic-house crops of southeast Spain in 2004. The causal agent was shown to be a Pythium species with a unique type of oogonium ornamentation different from any of the described species. Zoospores were not...

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Bibliographic Details
Published in:Mycological research 2008-09, Vol.112 (9), p.1115-1121
Main Authors: de Cock, Arthur W.A.M, André Lévesque, C, Melero-Vara, José M, Serrano, Yolanda, Luisa Guirado, M, Gómez, Julio
Format: Article
Language:English
Subjects:
Culture Media
DNA, Fungal - analysis
DNA, Fungal - isolation & purification
DNA, Ribosomal Spacer - analysis
fungal anatomy
green beans
Mycological Typing Techniques
new species
pathogenicity
Phaseolus - microbiology
Phaseolus vulgaris
Phylogeny
Plant Diseases - microbiology
plant pathogenic fungi
Plant Roots - microbiology
Pythium
Pythium - classification
Pythium - genetics
Pythium - pathogenicity
Pythium - ultrastructure
Pythium solare
RNA, Ribosomal, 16S - genetics
Sequence Analysis, DNA
Soil Microbiology
Spain
Species Specificity
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Summary:A new disease causing wilt and death of adult plants of Phaseolus vulgaris was discovered in plastic-house crops of southeast Spain in 2004. The causal agent was shown to be a Pythium species with a unique type of oogonium ornamentation different from any of the described species. Zoospores were not observed, but globose or subglobose hyphal swellings, intercalary or terminal, were frequently found. Moreover, the ribosomal ITS region showed a unique sequence, significantly different (>14%) from any other known species of Pythium. This paper describes and illustrates the morphology of the new Pythium species and its pathogenicity to green beans. Its taxonomic position and phylogenetic relationships with other Pythium species are discussed.
ISSN:0953-7562
1469-8102
DOI:10.1016/j.mycres.2008.03.005