Journal
TOXINS
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/toxins10070301
Keywords
Aspergillus flavus; Rum1; conidiation; sclerotia; aflatoxin
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Funding
- National Natural Science Foundation of China [31772105]
- Fund of Outstanding Youth of Fujian Province [2018J07002]
- Nature Science Foundation of Fujian Province [2017J01426]
- fund of Cultivation of Outstanding Youth Science and Technology Talents in Fujian Agriculture and Forestry University [xjq201410]
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Aspergillus flavus produces mycotoxins especially aflatoxin B-1 and infects crops worldwide. As a PHD transcription factor, there is no report on the role of Rum1 in the virulence of Aspergillus spp. yet. This study explored the biological function of Rum1 in A. flavus through the construction of rum1 deletion mutants and rum1 complementation strains with the method of homologous recombination. It was found, in the study, that Rum1 negatively regulates conidiation through abaA and brlA, positively regulates sclerotia formation through nsdC, nsdD, and sclR, triggers aflatoxin biological synthesis, and enhances the activity of amylase. Our findings suggested that Rum1 plays a major role in the growth of mycelia, conidia, and sclerotia production along with aflatoxin biosynthesis in A. flavus.
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