Lifestyle changes in Botryosphaeriaceae as evidenced by ancestral genome expansion and horizontal gene transfer
文献类型： 外文期刊
作者： Wang, Xuncheng 1 ; Zhang, Wei 1 ; Peng, Junbo 1 ; Manawasinghe, Ishara S. 2 ; Wu, Linna 1 ; Li, Yonghua 1 ; Xing, Qikai 1 ; Li, Xinghong 1 ; Yan, Jiye 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing Key Lab Environm Friendly Management Fruit, Beijing 100097, Peoples R China
2.Zhongkai Univ Agr & Engn, Innovat Inst Plant Hlth, Key Lab Green Prevent & Control Fruits & Vegetable, Minist Agr & Rural Affairs, Guangzhou 510225, Peoples R China
关键词： Botryosphaeriaceae; Plant fungi pathogens; Phenolic degradation; Iron uptake
期刊名称：FUNGAL DIVERSITY （ 2022影响因子：20.3； 五年影响因子：19.7 ）
ISSN： 1560-2745
年卷期： 2023 年
收录情况： SCI
摘要： Botryosphaeriaceae (Botryosphaeriales, Dothideomycetes, Ascomycota) encompasses commonly encountered opportunistic pathogens that cause stem cankers on woody plants. Lifestyles of Botryosphaeriaceae species could vary as endophytes, pathogens and saprobes and one species can have one or more lifestyles. Therefore, this family is an excellent candidate to study the relationships among lifestyles and lifestyle changes. It is postulated that this family has saprobic ancestors, and the mechanisms by which they evolved from nonpathogenic ancestors to woody pathogens remain unclear. Here, we present an analysis of 18 Botryosphaeriaceae genomes, including four newly generated high-quality genomes of Botryosphaeriaceae strains. We compared Botryosphaeriaceae genomes with phylogenetically closely related Dothideomycetes taxa including plant pathogens and saprobes which revealed significant net gene family expansion in Botryosphaeriaceae. This gene expansion is prominent in the early ancestors before the divergence of genera of Botryosphaeriaceae. This expansion affected the pathogenicity-related genes and detoxification genes. Furthermore, we analysed horizontal gene transfer, which is a mechanism of transfer to genetic material between organisms that are not in a parent-offspring relationship and identified widespread putative intra-kingdom horizontal gene transfer events in this family. Most were transferred during the evolution of ancient ancestors of Botryosphaeriaceae, before the divergence of the modern genera and were enriched in pathogenicity-related genes and detoxification genes. Furthermore, The RNA sequencing analysis of the Botryosphaeriaceae species Lasiodiplodia theobromae revealed that pathogenicity-related genes and detoxification genes, including those obtained through gene family expansion and horizontal gene transfers, were significantly induced after the infection of plant hosts rather than before infection. These insights reveal critical roles for gene family expansion and horizontal gene transfers in the evolutionary adaptation of Botryosphaeriaceae in the infection of woody plants. We postulate that the pathogenic lifestyle of Botryosphaeriaceae species evolved from saprobic or endophytic lifestyles in the early divergence of this family. However, there are few endophytic genomes available for closely related species of Botryosphaeriaceae, thus further studies are necessary to clarify the evolutionary relationships of the endophytes.
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