title: Investigations into the biochemical basis for nematode resistance in roots of three musa cultivars in response to Radopholus similis infection.
abstract: The Musa cultivars, Dwarf Cavendish, Yangambi Km5 and Kunnan, exhibit considerable differences in resistance to Radopholus similis. Infection resulted in significant increases in condensed tannins and flavan-3,4-diols in roots (P < 0.001). The highly resistant cultivar Kunnan had the highest levels of condensed tannins before and after infection. The preinfection levels were similar to the postinfection levels of the two other cultivars. Tannins had mostly procyanidin character, but Kunnan also contained propelargonidins; these compounds may be involved in the resistance mechanism. It is suggested that the butanol/HCl assay be used as a rapid test in screening for resistance to R. similis.
authors.affiliation: Department of Agriculture, The University of Reading, P.O. Box 236, Reading RG6 6AT, United Kingdom.
authors.forename: F M
authors.initials: FM
authors.lastname: Collingborn
authors.forename: S R
authors.initials: SR
authors.lastname: Gowen
authors.forename: I
authors.initials: I
authors.lastname: Mueller-Harvey
mesh_terms: D000818:Animals; D005638:Fruit / Q000235:genetics / Q000469:parasitology* / Q000502:physiology*; D007113:Immunity, Innate; D009348:Nematoda / Q000469:parasitology*; D010935:Plant Diseases; D018517:Plant Roots; D013045:Species Specificity; D013634:Tannins / Q000032:analysis*
chemical_list: D013634:Tannins