Impact on growth and aflatoxin B₁ accumulation by Kluyveromyces isolates at different water activity conditions

Author： Penna Mariángeles Etcheverry Miriam

ISSN： 0301-486X

Source： Mycopathologia, Vol.162, Iss.5, 2006-11, pp. : 347-353

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

This study showed the impact on germination, mycelial growth and aflatoxin B₁ accumulation when interacting Aspergillus aflatoxigenic strains with Kluyveromyces isolates and the effect of water activity on this relationship. Isolates Y₁₄ and Y₁₆ 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, Y₂₂, Y₁₆, and Y₁₄, and Kluyveromyces isolates Y₁₄ and Y₁₆ impact both growth and aflatoxin accumulation at wide range of water activity.