Antigenic differences among several Trichoderma isolates

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Abstract
Antisera against conidia of several Trichoderma isolates were raised in rabbits and tested by agglutination and immunofluorescence. Six serotypes were characterized and the differences in their surface properties studied. The serological differences among the isolates did not always reflect their taxonomic differences. Serological similarities were found in several instances between conidia and hyphae of the same isolate. Periodate oxidation of the conidia inhibited their serological reaction whereas trypsin had no effect. The use of specific antisera for serotyping Trichoderma isolates is discussed.