The interaction between Corynespora cassiicola and Hevea brasiliensis.
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In vitro and in planta inoculation of Hevea leaflets with a C. cassiicola conidium suspension revealed differences in resistance/susceptibility (R/S) amongst the clones tested. The R/S varied primarily according to the isolate and environmental factors. Under the experimental conditions, 260 proved highly susceptible and GT 1 almost totally resistant. The secretion of a toxin, which was isolated and identified as a small, 7.5kDa glycopeptide, was confirmed. Using the toxin resulted in the same R/Sclassification of the 9 clones studied by inoculation with conidia. The susceptibility of a clone seemed to depend on its ability to recognise and/or neutralize the toxin. It is suggested that using the toxin for leaf applications can enable early classification of the R/S of clones in the field, and antibodies could subsequently be used to establish the correlation between isolate virulence and toxin production.
Incluye 33 referencias bibliográficas.
In vitro and in planta inoculation of Hevea leaflets with a C. cassiicola conidium suspension revealed differences in resistance/susceptibility (R/S) amongst the clones tested. The R/S varied primarily according to the isolate and environmental factors. Under the experimental conditions, 260 proved highly susceptible and GT 1 almost totally resistant. The secretion of a toxin, which was isolated and identified as a small, 7.5kDa glycopeptide, was confirmed. Using the toxin resulted in the same R/Sclassification of the 9 clones studied by inoculation with conidia. The susceptibility of a clone seemed to depend on its ability to recognise and/or neutralize the toxin. It is suggested that using the toxin for leaf applications can enable early classification of the R/S of clones in the field, and antibodies could subsequently be used to establish the correlation between isolate virulence and toxin production.
Incluye 33 referencias bibliográficas.
In vitro and in planta inoculation of Hevea leaflets with a C. cassiicola conidium suspension revealed differences in resistance/susceptibility (R/S) amongst the clones tested. The R/S varied primarily according to the isolate and environmental factors. Under the experimental conditions, 260 proved highly susceptible and GT 1 almost totally resistant. The secretion of a toxin, which was isolated and identified as a small, 7.5kDa glycopeptide, was confirmed. Using the toxin resulted in the same R/Sclassification of the 9 clones studied by inoculation with conidia. The susceptibility of a clone seemed to depend on its ability to recognise and/or neutralize the toxin. It is suggested that using the toxin for leaf applications can enable early classification of the R/S of clones in the field, and antibodies could subsequently be used to establish the correlation between isolate virulence and toxin production.
Palabras clave
disease resistance, immunodiagnosis, plant diseases, plant pathogenic fungi, plant pathogens, plant pathology, rubber plants, testing, varietal reactions, Natural immunity, Immunodiagnosis, Plant diseases, Plant diseases, Phytopathogenic microorganisms, Plant diseases, Plant diseases, Rubber plants, Testing, Testing