Transcriptome-Based Discovery of Fusarium graminearum Stress Responses to FgHV1 Infection

文献类型： 外文期刊

第一作者： Zhang, Jingze

作者： Zhang, Jingze;Li, Pengfei;Qiu, Dewen;Guo, Lihua;Wang, Shuangchao

作者机构：

关键词： Fusarium graminearum;Fusarium graminearum hypovirus 1;transcriptome;stress responses;cellular redox regulation

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2016 年 17 卷 11 期

页码：

收录情况： SCI

摘要： Fusarium graminearum hypovirus 1 (FgHV1), which is phylogenetically related to Cryphonectria hypovirus 1 (CHV1), is a virus in the family Hypoviridae that infects the plant pathogenic fungus F. graminearum. Although hypovirus FgHV1 infection does not attenuate the virulence of the host (hypovirulence), it results in defects in mycelial growth and spore production. We now report that the vertical transmission rate of FgHV1 through asexual spores reached 100%. Using RNA deep sequencing, we performed genome-wide expression analysis to reveal phenotype-related genes with expression changes in response to FgHV1 infection. A total of 378 genes were differentially expressed, suggesting that hypovirus infection causes a significant alteration of fungal gene expression. Nearly two times as many genes were up-regulated as were down-regulated. A differentially expressed gene enrichment analysis identified a number of important pathways. Metabolic processes, the ubiquitination system, and especially cellular redox regulation were the most affected categories in F. graminearum challenged with FgHV1. The p20, encoded by FgHV1 could induce H2O2 accumulation and hypersensitive response in Nicotiana benthamiana leaves. Moreover, hypovirus FgHV1 may regulate transcription factors and trigger the RNA silencing pathway in F. graminearum.

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