title: Biosorption of cadmium ions by different yeast species.
abstract: Toxicity and accumulation of Cd2+ in yeasts were studied in eight different yeast species. The adaptation to toxic concentration of this metal was dependent on the production of extracellular yeast glycoproteins. The highest concentration of Cd2+ ions in the growth medium was tolerated by a Hansenula anomala, strain while the lowest tolerance was found by the strain of species Saccharomyces cerevisiae. Extracellular glycoproteins of Hansenula anomala absorbed nearly 90% of the total content of Cd2+ ions bound by yeast cells, while extracellular glycoproteins of Saccharomyces cerevisiae bound only 6% of the total amount of cadmium. This difference is caused by the variable composition of the saccharide moiety in the extracellular glycoproteins. The composition of extracellular glycoproteins changed during the adaptation of the yeast cells to the presence of Cd2+ ions.
authors.affiliation: Institute of Chemistry Slovak Academy of Sciences, Bratislava. chememi@savba.sk
authors.forename: Emília
authors.initials: E
authors.lastname: Breierová
authors.forename: Ingrid
authors.initials: I
authors.lastname: Vajcziková
authors.forename: Vlasta
authors.initials: V
authors.lastname: Sasinková
authors.forename: Eva
authors.initials: E
authors.lastname: Stratilová
authors.forename: Iav
authors.initials: I
authors.lastname: Fisera
authors.forename: Tomás
authors.initials: T
authors.lastname: Gregor
authors.forename: Ján
authors.initials: J
authors.lastname: Sajbidor
mesh_terms: D000042:Absorption; D002104:Cadmium / Q000493:pharmacokinetics*; D003454:Cryptococcus / Q000502:physiology; D003470:Culture Media; D010843:Pichia / Q000502:physiology; D012248:Rhodotorula / Q000502:physiology; D012441:Saccharomyces cerevisiae / Q000502:physiology; D013045:Species Specificity; D017550:Spectroscopy, Fourier Transform Infrared; D015003:Yeasts / Q000502:physiology*
chemical_list: D003470:Culture Media; D002104:Cadmium