The APSES transcription factor CfSwi6 is required for growth, cell wall integrity, and pathogenicity of Ceratocystis fimbriata

文献类型： 外文期刊

第一作者： Cong, Hao

作者： Cong, Hao;Sun, Yong;Li, Changgen;Zhang, Yongjing;Wang, Yiming;Jiang, Jihong;Li, Lianwei;Li, Ludan;Ma, Daifu

作者机构：

关键词： Swi6; Ceratocystis fimbriata; Cell wall integrity; Pathogenicity; Sweet potato

期刊名称：MICROBIOLOGICAL RESEARCH （ 影响因子：6.7； 五年影响因子：7.1 ）

ISSN： 0944-5013

年卷期： 2024 年 281 卷

页码：

收录情况： SCI

摘要： Cell wall integrity (CWI) is crucial for the growth, development, and host invasion of pathogenic fungi. The APSES transcription factor Swi6 in fungi plays a role in mediating cell wall integrity through the mitogenactivated protein kinase (MAPK) signaling pathway. Ceratocystis fimbriata is a notorious pathogenic fungus responsible for causing black rot in sweet potatoes. In this study, an orthologous APSES transcription factor Swi6 (CfSwi6) downstream of the CWI regulatory pathway in C. fimbriata was characterized. Deletion of CfSWI6 leads to impaired hyphal development, conidiation, and compromised cell wall integrity, resulting in a significant reduction in virulence. Transcriptome analysis revealed the involvement of CfSWI6 in various pathways, including the MAPK pathway, DNA synthesis and stress response. ChIP-seq data provided predictions of potential target genes regulated by CfSwi6. Through yeast one-hybrid, we confirmed the direct binding of CfSwi6 to the promoter of the chitin synthetase gene. In summary, these findings indicated that CfSwi6 plays an important role in the growth, development, and pathogenicity of C. fimbriata. This study provides new insights into the pathogenic mechanism of C. fimbriata in sweet potato and inspires potential strategies to control sweet potato black rot.

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