PIMAPK10, a Mitogen-Activated Protein Kinase (MAPK) in Peronophythora litchii, Is Required for Mycelial Growth, Sporulation, Laccase Activity, and Plant Infection

文献类型： 外文期刊

第一作者： Jiang, Liqun

作者： Jiang, Liqun;Situ, Junjian;Wan, Lang;Xu, Dandan;Chen, Yubin;Xi, Pinggen;Jiang, Zide;Jiang, Liqun;Deng, Yi Zhen

作者机构：

关键词： Peronophythora litchii; mitogen-activated protein kinase; gene silencing; pathogenicity; laccase activity

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Mitogen-activated protein kinase (MAPK) pathways are ubiquitous and evolutionarily conserved signal transduction modules directing cellular respond to a diverse array of stimuli, in the eukaryotic organisms. In this study, PIMAPK10 was identified to encode a MAPK in Peronophythora litchii, the oomycete pathogen causing litchi downy blight disease. PIMAPK10, containing a specific and highly conserved dual phosphorylation lip sequence SEY (Serine-Glutamic-Tyrosine), represents a novel group of MAPKs as previously reported. Transcriptional profiling showed that PIMAPK10 expression was up-regulated in zoospore and cyst stages. To elucidate its function, the PIMAPK10 gene was silenced by stable transformation. PIMAPK10 silence did not impair oospore production, sporangium germination, zoospore encyst, or cyst germination but hindered hyphal growth, sporulation, pathogenicity, likely due to altering laccase activity. Over all, our results indicated that a MAPK encoded by PIMAPK10 gene in P. litchii is important for pathogenic development.

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