Journal
JOURNAL OF FUNGI
Volume 8, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/jof8010038
Keywords
transcription factor; melanin; conidia development; Pestalotiopsis microspora
Categories
Funding
- National Science Foundation of China [81871629, 31900130]
Ask authors/readers for more resources
This study identified two transcription factors, Pmr1 and Pmr2, in the filamentous fungus Pestalotiopsis microspora, and revealed their crucial roles in melanin synthesis, asexual development, and secondary metabolism. Pmr1 played a larger regulatory role in secondary metabolism, while both Pmr1 and Pmr2 were involved in the biosynthesis of conidia pigment.
Melanins are the common fungal pigment, which contribute to stress resistance and pathogenesis. However, few studies have explored the regulation mechanism of its synthesis in filamentous fungi. In this study, we identified two transcription factors, Pmr1 and Pmr2, in the filamentous fungus Pestalotiopsis microspora. Computational and phylogenetic analyses revealed that Pmr1 and Pmr2 were located in the gene cluster for melanin biosynthesis. The targeted deletion mutant strain Delta pmr1 displayed defects in biosynthesis of conidia pigment and morphological integrity. The deletion of pmr2 resulted in reduced conidia pigment, but the mycelial morphology had little change. Moreover, Delta pmr2 produced decreased conidia. RT-qPCR data revealed that expression levels of genes in the melanin biosynthesis gene cluster were downregulated from the loss of Pmr1 and Pmr2. Interestingly, the yield of secondary metabolites in the mutant strains Delta pmr1 and Delta pmr2 increased, comparing with the wild type, and additionally, Pmr1 played a larger regulatory role in secondary metabolism. Taken together, our results revealed the crucial roles of the transcription factors Pmr1 and Pmr2 in melanin synthesis, asexual development and secondary metabolism in the filamentous fungus P. microspora.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available