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Molecular and pathogenic characterization of Fusarium redolens, a new causal agent of Fusarium yellows in Chickpea

AutorJiménez Fernández, Daniel; Navas Cortés, Juan Antonio ; Montes Borrego, Miguel ; Jiménez-Díaz, Rafael M. ; Landa, Blanca B.
Fecha de publicaciónjul-2011
EditorAmerican Physiological Society
CitaciónPlant Disease 95(7): 860-870 (2011)
ResumenThe association of Fusarium redolens with wilting-like symptoms in chickpea in Lebanon, Morocco, Pakistan, and Spain is reported for the first time, together with the molecular and pathogenic characterization of isolates of the pathogen from chickpea of diverse geographic origin. Maximum parsimony analysis of sequences of the translation elongation factor 1α (TEF-1α) gene grouped all F. redolens isolates from chickpea in the same main clade. Pathogenicity assays using three chickpea cultivars and isolates from different geographic origins indicated that F. redolens is mildly virulent on chickpea. Moreover, infection of chickpea by F. redolens induces a disease syndrome similar to that caused by the yellowing pathotype of F. oxysporum f. sp. ciceris, including leaf yellowing and necrosis that develop upward from the stem base, and premature senescence of the plant. In contrast, F. redolens does not cause discoloration of the vascular tissues in chickpea but does cause brown necrotic lesions in the tap root and necrosis of lateral roots. F. redolens is not easily differentiated from F. oxysporum f. sp. ciceris using morphology-based diagnosis, and the two species cause similar symptoms on chickpea; therefore, the use of molecular protocols should help to avoid misdiagnoses of Fusarium yellows in chickpea. © 2011 The American Phytopathological Society.
URIhttp://hdl.handle.net/10261/89933
DOI10.1094/PDIS-12-10-0946
Identificadoresdoi: 10.1094/PDIS-12-10-0946
issn: 0191-2917
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