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Title

Interactions between Pratylenchus thornei and Fusarium oxysporum f.sp. ciceris on chickpea

AuthorsCastillo, Pablo ; Mora-Rodríguez, María P.; Navas Cortés, Juan Antonio ; Jiménez-Díaz, Rafael M.
KeywordsPathogenicity
Resistance
Integrated management
Cicer arietinum
Issue DateAug-1998
PublisherAmerican Phytopathological Society
CitationPhytopathology 88(8): 828-836 (1998)
AbstractFusarium oxysporum f. sp. ciceris and the root-lesion nematode Pratylenchus thornei coinfect chickpeas in southern Spain. The influence of root infection by P. thornei on the reaction of Fusarium wilt-susceptible (CPS 1 and PV 61) and wilt-resistant (UC 27) chickpea cultivars to F. oxysporum f. sp. ciceris race 5 was investigated under controlled and field conditions. Severity of Fusarium wilt was not modified by coinfection of chickpeas by P. thornei and F. oxysporum f. sp. ciceris, in simultaneous or sequential inoculations with the pathogens. Root infection with five nematodes per cm3 of soil and 5,000 chlamydospores per g of soil of the fungus resulted in significantly higher numbers of propagules of F. oxysporum f. sp. ciceris with the wilt-susceptible cultivar CPS 1, but not with the wilt-resistant one. However, infection with 10 nematodes per cm3 of soil significantly increased root infection by F. oxysporum f. sp. ciceris in both cultivars, irrespective of fungal inoculum densities (250 to 2,000 chlamydospores per g of soil). Plant growth was significantly reduced by P. thornei infection on wilt-susceptible and wilt-resistant chickpeas in controlled and field conditions, except when shorter periods of incubation (45 days after inoculation) were used under controlled conditions. Severity of root necrosis was greater in wilt-susceptible and wilt-resistant cultivars when nematodes were present in the root, irrespective of length of incubation time (45 to 90 days), densities of nematodes (5 and 10 nematodes per cm3 of soil), fungal inocula, and experimental conditions. Nematode reproduction on the wilt-susceptible cultivars, but not on the wilt-resistant one, was significantly increased by F. oxysporum f. sp. ciceris infections under controlled and field conditions.
Description9 pages, 6 tables.-- PMID: 18944890 [PubMed].
Publisher version (URL)http://dx.doi.org/10.1094/PHYTO.1998.88.8.828
URIhttp://hdl.handle.net/10261/7626
DOI10.1094/PHYTO.1998.88.8.828
ISBN0031-949X
Appears in Collections:(IAS) Artículos
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