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- W4292867199 abstract "CmrA, as transcription factor for regulating DHN-melanin synthesis, controls melanin synthesis gene expression, and also regulate growth, development, stress response and virulence of plant fungi. However, little is known about the roles of CmrA on infection structure formation, penetration and pathogenicity of pear fungal Alternaria alternata. Here, we identified cmrA gene in A. alternata and assigned as AacmrA, sequence alignment and phylogenetic analysis revealed that AacmrA is highly conserved among fungi and encoded protein contain two Cys2His2 zinc finger motifs and one Zn(II)2Cys6 zinc cluster protein motif. ΔAacmrA severely decreased melanin production and DHN melanin synthesis related genes expression. Deletion of AacmrA impaired the morphology of spore and hyphae. Spore germination and appressorium formation induced by hydrophobicity surfaces and fruit wax significantly decreased in ΔAacmrA mutant. ΔAacmrA mutants were more sensitive than the wild type to osmotic stress and cell wall inhibitors, especially more sensitive to oxidative stress. In addition, lesion diameter of pear fruit wound inoculated with the ΔAacmrA mutant was reduced by 40.8% compared with the wild type 12 d after inoculation. All findings of this study suggested that AacmrA is required for melanin biosynthesis, infection structure formation, and pathogenicity in A. alternata." @default.
- W4292867199 created "2022-08-24" @default.
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- W4292867199 date "2022-10-01" @default.
- W4292867199 modified "2023-10-13" @default.
- W4292867199 title "Transcription factor AacmrA mediated melanin synthesis regulates the growth, appressorium formation, stress response and pathogenicity of pear fungal Alternaria alternata" @default.
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- W4292867199 doi "https://doi.org/10.1016/j.funbio.2022.08.008" @default.
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