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- W2954018319 abstract "Expression of genes associated with cyclopiazonic acid (CPA) biosynthesis by Penicillium strains in a cheese-based medium has not been previously studied. To control CPA biosynthesis, it would be useful to understand the changes in gene expression during cheese production and relate them to toxin production. The objective was to evaluate the influence of pH, a w , and temperature on expression of dma T, which encodes the enzyme dimethylallyl tryptophan synthase involved in the biosynthesis of CPA. We assayed three Penicillium strains, Penicillium commune CBS311 and CBS341 and Penicillium camemberti CBS273, using reverse transcription real-time PCR. Our results showed that the expression patterns of the gene were influenced by strain and environmental conditions. The highest expression for the P. commune strains was observed at pH 6.0, 0.95 a w , at 25 or 30 °C, depending on the strain. In contrast, P. camemberti CBS273 showed a lower dma T expression with a maximum at 25 °C, pH 5.0 and 0.95 a w . Correlation analysis indicated that the three toxigenic strains showed a strong correlation between the relative expression of the dma T gene and concentration of CPA under conditions simulating cheese ripening. This method could be used to control CPA production in cheese by detection of dma T expression. • Expression of the gene associated with cyclopiazonic acid (CPA) biosynthesis on a cheese-based medium. • Effect of pH, water activity, and temperature on the expression was determined by quantitative RT-PCR. • A strong correlation between the relative expression of gen and the concentration of CPA was showed. • Detection of expression by its regulatory gene could be used as CPA control." @default.
- W2954018319 created "2019-07-12" @default.
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- W2954018319 date "2021-02-01" @default.
- W2954018319 modified "2023-09-22" @default.
- W2954018319 title "Cyclopiazonic acid gene expression as strategy to minimizing mycotoxin contamination in cheese" @default.
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- W2954018319 doi "https://doi.org/10.1016/j.funbio.2019.06.011" @default.
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