title: Impact on growth and aflatoxin B1 accumulation by Kluyveromyces isolates at different water activity conditions.
abstract: This study showed the impact on germination, mycelial growth and aflatoxin B(1) accumulation when interacting Aspergillus aflatoxigenic strains with Kluyveromyces isolates and the effect of water activity on this relationship. Isolates Y(14) and Y(16) reduced the percentage of germination of all Aspergillus strains and decrease germ tube elongation rate at majority of water activity assayed. Similarly they produced an increase of germination lag phase and lag phase of growth beside decreased growth rate of all Aspergillus strains. At water activities 0.994, 0.982, 0.955 and 0.937, no aflatoxins were produced in paired cultures with isolates Y(25,) Y(22), Y(16), and Y(14), and Kluyveromyces isolates Y(14) and Y(16) impact both growth and aflatoxin accumulation at wide range of water activity.
authors.affiliation: Departamento de Microbiología e Inmunología, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba, Argentina.
authors.forename: Mariángeles La
authors.initials: ML
authors.lastname: Penna
authors.forename: Miriam
authors.initials: M
authors.lastname: Etcheverry
mesh_terms: D016604:Aflatoxin B1 / Q000096:biosynthesis*; D000898:Antibiosis; D001230:Aspergillus / Q000254:growth & development / Q000378:metabolism*; D018556:Crops, Agricultural / Q000382:microbiology; D007716:Kluyveromyces / Q000502:physiology*; D025282:Mycelium / Q000254:growth & development; D014867:Water / Q000378:metabolism*; D003313:Zea mays / Q000382:microbiology
chemical_list: D014867:Water; D016604:Aflatoxin B1