The Chromatin Modifier Protein FfJMHY Plays an Important Role in Regulating the Rate of Mycelial Growth and Stipe Elongation in Flammulina filiformis
文献类型： 外文期刊
作者： Li, Jian 1 ; Shao, Yanping 1 ; Yang, Yayong 1 ; Xu, Chang 1 ; Jing, Zhuohan 1 ; Li, Hui 3 ; Xie, Baogui 2 ; Tao, Yongxin 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou 350002, Peoples R China
2.Fujian Agr & Forestry Univ, Coll Life Sci, Mycol Res Ctr, Fuzhou 350002, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Inst Cash Crops, Shijiazhuang 050051, Hebei, Peoples R China
关键词： Flammulina filiformis; stipe elongation; mycelial growth; chromatin modifier protein; cell wall composition
期刊名称：JOURNAL OF FUNGI （ 影响因子：5.724； 五年影响因子：6.413 ）
ISSN：
年卷期： 2022 年 8 卷 5 期
页码：
收录情况： SCI
摘要： Stipe elongation is an important process in the development of the fruiting body and is associated with the commodity quality of agaric fungi. In this study, F. filiformis was used as a model agaric fungus to reveal the function of the chromatin modifier gene containing the JmjC domain in stipe elongation. First, we identified a JmjC domain family gene (FfJmhy) with a 3684 bp length open reading frame (ORF) in F. filiformis. FfJmhy was predicted to have a histone H3K9 demethylation function, and was specifically upregulated during stipe rapid elongation. Further investigation revealed that the silencing of FfJmhy inhibited the mycelial growth, while overexpression of this gene had no effect on the mycelial growth. Comparative analysis revealed that the stipe elongation rate in FfJmhy overexpression strains was significantly increased, while it was largely reduced when FfJmhy was silenced. Taken together, these results suggest that FfJmhy positively regulates the mycelial growth and controls the elongation speed and the length of the stipe. Moreover, cell wall-related enzymes genes, including three exo-beta-1,3-glucanases, one beta-1,6-glucan synthase, four chitinases, and two expansin proteins, were found to be regulated by FfJmhy. Based on the putative functions of FfJmhy, we propose that this gene enhances the transcription of cell wall-related enzymes genes by demethylating histone H3K9 sites to regulate remodeling of the cell wall in rapid stipe elongation. This study provides new insight into the mechanism of rapid stipe elongation, and it is important to regulate the commodity quality of agaric fungi.
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