title: Protoplast fusion hybrids of Candida albicans sterol mutants differing in nystatin resistance.
abstract: Intraspecific protoplast fusion, induced by polyethylene glycol and Ca2+, was carried out in various pairings between auxotrophic nystatin-sensitive, ergosterol-producing strains of Candida albicans and their nystatin-resistant, ergosterol-less mutants of different origins. Nutritionally-complemented stable heterozygous diploid hybrids were obtained, which proved to be sensitive, semi-resistant or resistant to nystatin as a consequence of complementation or non-complementation for ergosterol biosynthesis. Dominant mutation control of the resistance was not found.
mesh_terms: D002176:Candida albicans / Q000378:metabolism*; D002459:Cell Fusion; D004352:Drug Resistance, Microbial; D004875:Ergosterol / Q000096:biosynthesis*; D005816:Genetic Complementation Test; D009154:Mutation; D009761:Nystatin / Q000494:pharmacology*
chemical_list: D009761:Nystatin; D004875:Ergosterol