Zhejiang Academy of Forestry, Liuhe Road, 310023, Hangzhou, China.
Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Box 7026, 750 05, Uppsala, Sweden.
Sci Rep. 2020 Apr 3;10(1):5884. doi: 10.1038/s41598-020-62521-x.
Heterobasidion irregulare and H. occidentale are two closely related conifer root rot pathogens in the H. annosum sensu lato (s.l.) species complex. The two species H. irregulare and H. occidentale have different host preference with pine and non-pine tree species favored, respectively. The comparison of transcriptomes of H. irregulare and H. occidentale growing in Norway spruce bark, a susceptible host non-native to North America, showed large differences in gene expression. Heterobasidion irregulare induced more genes involved in detoxification of host compounds and in production of secondary metabolites, while the transcriptome induced in H. occidentale was more oriented towards carbohydrate degradation. Along with their separated evolutionary history, the difference might be driven by their host preferences as indicated by the differentially expressed genes enriched in particular Gene Ontology terms.
不规则隔担耳和西方隔担耳是同丝核菌广义种（s.l.）物种复合体中两种密切相关的针叶树根腐病原菌。不规则隔担耳和西方隔担耳这两个物种对宿主的偏好不同，分别偏爱松树和非松树树种。在挪威云杉树皮中生长的不规则隔担耳和西方隔担耳的转录组比较表明，它们的基因表达存在很大差异。不规则隔担耳诱导了更多参与宿主化合物解毒和次生代谢产物生产的基因，而在西方隔担耳中诱导的转录组则更倾向于碳水化合物降解。除了它们分开的进化历史之外，这种差异可能是由它们的宿主偏好驱动的，这可以从在特定基因本体术语中富集的差异表达基因中看出。
