Format

Send to

Choose Destination
See comment in PubMed Commons below
FEMS Microbiol Lett. 2011 Sep;322(2):145-9. doi: 10.1111/j.1574-6968.2011.02345.x. Epub 2011 Jul 14.

Tight control of mycotoxin biosynthesis gene expression in Aspergillus flavus by temperature as revealed by RNA-Seq.

Author information

1
Southern Regional Research Center, Agricultural Research Service-ARS, US Department of Agriculture-USDA, New Orleans, LA 70124, USA. jiujiang.yu@ars.usda.gov

Abstract

To better understand the effect of temperature on mycotoxin biosynthesis, RNA-Seq technology was used to profile the Aspergillus flavus transcriptome under different temperature conditions. This approach allowed us to quantify transcript abundance for over 80% of fungal genes including 1153 genes that were differentially expressed at 30 and 37 °C. Eleven of the 55 secondary metabolite clusters were upregulated at the lower temperature, including aflatoxin biosynthesis genes, which were among the most highly upexpressed genes. On average, transcript abundance for the 30 aflatoxin biosynthesis genes was 3300 times greater at 30 °C as compared with 37 °C. The results are consistent with the view that high temperature negatively affects aflatoxin production by turning down transcription of the two key transcriptional regulators, aflR and aflS. Subtle changes in the expression levels of aflS to aflR appear to control transcription activation of the aflatoxin cluster.

[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Silverchair Information Systems Icon for Wiley
    Loading ...
    Support Center