Metagenome sequence of Elaphomyces granulatus from sporocarp tissue reveals Ascomycota ectomycorrhizal fingerprints of genome expansion and a Proteobacteria-rich microbiome Public Deposited

http://ir.library.oregonstate.edu/concern/articles/n583xw628

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The article is copyrighted by the Society for Applied Microbiology and John Wiley & Sons, Ltd. It is published by John Wiley & Sons, Ltd. and can be found at:  http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291462-2920

Supporting information is available online at:  http://onlinelibrary.wiley.com/doi/10.1111/1462-2920.12840/abstract

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  • Many obligate symbiotic fungi are difficult to maintain in culture, and there is a growing need for alternative approaches to obtaining tissue and subsequent genomic assemblies from such species. In this study, the genome of Elaphomyces granulatus was sequenced from sporocarp tissue. The genome assembly remains on many contigs, but gene space is estimated to be mostly complete. Phylogenetic analyses revealed that the Elaphomyces lineage is most closely related to Talaromyces and Trichocomaceae s.s. The genome of E. granulatus is reduced in carbohydrate-active enzymes, despite a large expansion in genome size, both of which are consistent with what is seen in Tuber melanosporum, the other sequenced ectomycorrhizal ascomycete. A large number of transposable elements are predicted in the E. granulatus genome, especially Gypsy-like long terminal repeats, and there has also been an expansion in helicases. The metagenome is a complex community dominated by bacteria in Bradyrhizobiaceae, and there is evidence to suggest that the community may be reduced in functional capacity as estimated by KEGG pathways. Through the sequencing of sporocarp tissue, this study has provided insights into Elaphomyces phylogenetics, genomics, metagenomics and the evolution of the ectomycorrhizal association.
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  • Quandt, C. A., Kohler, A., Hesse, C. N., Sharpton, T. J., Martin, F., & Spatafora, J. W. (2015). Metagenome sequence of Elaphomyces granulatus from sporocarp tissue reveals Ascomycota ectomycorrhizal fingerprints of genome expansion and a Proteobacteria‐rich microbiome. Environmental Microbiology, 17(8), 2952-2968. doi:10.1111/1462-2920.12840
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