Effect of temperature and water activity on growth and ochratoxin A production by Australian Aspergillus carbonarius and A. niger isolates on a simulated grape juice medium

Simple item page
dc.contributor.authorLeong, S.
dc.contributor.authorHocking, A.
dc.contributor.authorScott, E.
dc.date.issued2006
dc.description.abstractThe effect of water activity (0.92, 0.95, 0.965 and 0.98) and temperature (15 °C, 25 °C, 30 °C and 35 °C) on growth rate and ochratoxin A (OA) production by five strains of Aspergillus carbonarius and two strains of A. niger isolated from Australian vineyards was characterised on a synthetic grape juice medium. Maximum growth for A. carbonarius occurred at ca 0.965 a{w} and 30 °C, and for A. niger, at ca 0.98 a{w} and 35 °C. The optimum temperature for OA production was 15 °C and little was produced above 25 °C. The optimum a{w} for toxin production was 0.95–0.98 for A. carbonarius and 0.95 for A. niger. Toxin was produced in young colonies after and, typically, did not continue to accumulate the entire surface area of the plate was colonised. Rather, the amount decreased as colonies aged. Trends for growth and OA production were similar among Australian isolates and those from European grapes, as reported in the literature.
dc.description.statementofresponsibilitySu-lin L. Leong, Ailsa D. Hocking and Eileen S. Scott
dc.identifier.citationInternational journal of food microbiology, 2006; 110(3):209-216
dc.identifier.doi10.1016/j.ijfoodmicro.2006.04.005
dc.identifier.issn0168-1605
dc.identifier.issn1879-3460
dc.identifier.orcidScott, E. [0000-0001-6829-519X]
dc.identifier.urihttp://hdl.handle.net/2440/23919
dc.language.isoen
dc.publisherElsevier Science BV
dc.rightsCopyright © 2006 Published by Elsevier B.V.
dc.source.urihttps://doi.org/10.1016/j.ijfoodmicro.2006.04.005
dc.subjectgrapes
dc.subjectwine
dc.subjectochratoxin
dc.titleEffect of temperature and water activity on growth and ochratoxin A production by Australian Aspergillus carbonarius and A. niger isolates on a simulated grape juice medium
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Agriculture, Food and Wine publications