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Título : Interactions between Meloidogyne artiellia, the cereal and legume root-knot nematode, and Fusarium oxysporum f. sp. ciceris race 5 in chickpea
Autor : Castillo, Pablo ; Navas Cortés, Juan Antonio; Gomar Tinoco, David; Di Vito, Mauro; Jiménez-Díaz, Rafael M.
Palabras clave : Breakdown of race-specific resistance
Cicer arietinum
Fungus-nematode interaction
Fecha de publicación : dic-2003
Editor: American Phytopathological Society
Citación : Phytopathology 93(12): 1513-1523 (2003)
Resumen: In the Mediterranean Basin, Fusarium oxysporum f. sp. ciceris and the root-knot nematode Meloidogyne artiellia coinfect chickpea. The influence of root infection (after inoculation with 20 nematode eggs and second-stage juveniles per gram of soil) by two M. artiellia populations, from Italy and Syria, on the reaction of chickpea lines and cultivars with partial resistance to Fusarium wilt (CA 252.10.1.OM, CA 255.2.5.0, CPS 1, and PV 61) and with complete resistance to F. oxysporum f. sp. ciceris race 5 (CA 334.20.4, CA 336.14.3.0, ICC 14216 K, and UC 27) was investigated under controlled conditions. In genotypes with partial resistance, infection by M. artiellia significantly increased the severity of Fusarium wilt, irrespective of the fungal inoculum density (3,000 or 30,000 chlamydospores per gram of soil), except in cultivar CPS 1 at the lower fungal inoculum density. In genotypes with complete resistance to Fusarium wilt, infection by M. artiellia overcame the resistance to F. oxysporum f. sp. ciceris race 5 in CA 334.20.4 and CA 336.14.3.0 but not in ICC 14216 K, irrespective of the fungal inoculum density, and overcame the resistance in UC 27 only at the higher inoculum density. Infection by the nematode significantly increased the number of propagules of F. oxysporum f. sp. ciceris race 5 in root tissues of genotypes with complete resistance to Fusarium wilt, compared with roots that were not inoculated with the nematode, irrespective of the fungal inoculum density, except in ICC 14216 K, in which this effect occurred only at the higher inoculum density. Reproduction of an M. artiellia population from Syria in the absence of F. oxysporum f. sp. ciceris race 5 was significantly higher than that of a population from Italy in all tested chickpea genotypes except ICC 14216 K. However, there was no significant difference between the reproduction rates of the two nematode populations in plants infected with F. oxysporum f. sp. ciceris race 5, irrespective of the fungal inoculum density and the reaction of the genotypes to the fungus.
Versión del editor: http://dx.doi.org/10.1094/PHYTO.2003.93.12.1513
URI : http://hdl.handle.net/10261/7627
DOI: 10.1094/PHYTO.2003.93.12.1513
ISBN : 0031-949X
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