ADHESION OF CONIDIA OF DRECHMERIA-CONIOSPORA TO CAENORHABDITIS-ELEGANS WILD-TYPE AND MUTANTS

Adhesion of conidia of the endoparasitic fungus Drechmeria coniospora to the cuticles of the wild type and four different head defective mut ants of Caenorhabditis elegans, and subsequent infection, was studied. The conidia adhered around the sensory structures in the head region, vulva, and occasionally to other parts of the cuticle in both mutant and wild type hosts. Infection took place after adhesion to the head r egion by penetration through the cuticle, and, following adhesion arou nd the vulva, through the natural orifice. Infection was not observed after adhesion to other parts of the cuticle. Adhesion was reduced aft er treatment of the nematodes with Pronase E. Adhesion returned toward s normal again within 2 hours, indicating that the proteinaceous mater ial emanating from the sensory structures was rapidly replaced.