文章基本信息

标题：Genome, genetic evolution, and environmental adaptation mechanisms of Schizophyllum commune in deep subseafloor coal-bearing sediments
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作者：Xuan Liu ; Xin Huang ; Chen Chu 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：6
页码：1-19
DOI：10.1016/j.isci.2022.104417
语种：English
出版社：Elsevier
摘要：SummaryTo understand the genomic evolution and adaptation strategies of fungi to subseafloor sedimentary environments, wede novoassembled the genome of Schizophyllum communestrain 20R-7-F01 isolated from ∼2.0 km-deep, ∼20-million years ago (Mya) coal-bearing sediments. Phylogenomics study revealed a differentiation time of 28–73 Mya between this strain and the terrestrial type-strain H4-8, in line with sediment age records. Comparative genome analyses showed that FunK1 protein kinase, NmrA family, and transposons in this strain are significantly expanded, possibly linking to the environmental adaptation and persistence in sediment for over millions of years. Re-sequencing study of 14S. communestrains sampled from different habitats revealed that subseafloor strains have much lower nucleotide diversity, substitution rate, and homologous recombination rate than other strains, reflecting that the growth and/or reproduction of subseafloor strains are extremely slow. Our data provide new insights into the adaptation and long-term survival of the fungi in the subseafloor sedimentary biosphere.Graphical abstractDisplay OmittedHighlights•The genome of subseafloorSchizophyllum communeis distinct from that of other environmental isolates•The divergence time between strains 20R-7-F01 and H4-8 ofS. communeis 28–73 Mya•S. communeexperiences an evolutionary stasis in the subseafloor environment•DNA repair, transposons, and CAZymes help fungi adapt to the subseafloor environmentGeology; Mycology