title: [Conditions favoring differentiation and stabilization of the life cycle of the yeast Pachysolen tannophilus].
abstract: Conditions favoring differentiation and stabilization of the life cycle of the yeast Pachysolen tannophilus have been studied. When concentrations of the carbon source in the medium were lower than 100 g/l, it was found to be favorable to the mating of vegetative cells, both haploid and diploid. The addition of nitrogen and sulfur sources to the medium influenced the life phases of haploid cells and partially stabilized the vegetative growth of diploid cells. Enrichment of the nutrient medium with potassium, vitamins, and microelements was shown to be necessary for the formation and maturation of conjugated ascospores. Microelements, vitamins, and phosphorus in excessive amounts activated conjugation but did not provide for the distinct phases of formation of unconjugated asci and spores in the diploid cells. Possible reasons for the unstable diplophase in the yeast P. tannophilus are discussed.
authors.forename: O I
authors.initials: OI
authors.lastname: Bolotnikova
authors.forename: N P
authors.initials: NP
authors.lastname: Mikhaĭlova
authors.forename: M V
authors.initials: MV
authors.lastname: Shabalina
authors.forename: E N
authors.initials: EN
authors.lastname: Bodunova
authors.forename: A I
authors.initials: AI
authors.lastname: Ginak
mesh_terms: D002453:Cell Cycle; D003470:Culture Media; D009584:Nitrogen; D011188:Potassium; D004718:Saccharomycetales / Q000166:cytology* / Q000254:growth & development / Q000502:physiology*; D013170:Spores; D013455:Sulfur; D014815:Vitamins
chemical_list: D003470:Culture Media; D014815:Vitamins; D013455:Sulfur; D009584:Nitrogen; D011188:Potassium