Evolutionary innovations through gain and loss of genes in the ectomycorrhizal Boletales.

0555921 - BC 2023 RIV GB eng J - Journal Article
Wu, G. - Miyauchi, S. - Morin, E. - Kuo, A. - Drula, E. - Varga, A. - Kohler, A. - Feng, B. - Cao, Y. - Lipzen, A. - Daum, C. - Hundley, H. - Pangilinan, J. - Johnson, J. - Barry, K. - LaButti, K. - Ng, V. - Ahrendt, S. - Min, B. - Choi, I.G. - Park, Hongjae - Plett, J.M. - Magnuson, J. - Spatafora, J.W. - Nagy, L.G. - Henrissat, B. - Grigoriev, I.V. - Yang, Z. L. - Xu, J. - Martin, F.M.
Evolutionary innovations through gain and loss of genes in the ectomycorrhizal Boletales.
New Phytologist. Roč. 233, č. 3 (2022), s. 1383-1400. ISSN 0028-646X. E-ISSN 1469-8137
Institutional support: RVO:60077344
Keywords : r/bioconductor package * phylogenetic analysis * host-specificity * diversity * Boletales * brown-rot fungi * CAZymes * comparative genomics * ectomycorrhizal fungi * trait evolution
OECD category: Mycology
Impact factor: 9.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1111/nph.17858

We aimed to identify genomic traits of transitions to ectomycorrhizal ecology within the Boletales by comparing the genomes of 21 symbiotrophic species with their saprotrophic brown-rot relatives. Gene duplication rate is constant along the backbone of Boletales phylogeny with large loss events in several lineages, while gene family expansion sharply increased in the late Miocene, mostly in the Boletaceae. Ectomycorrhizal Boletales have a reduced set of plant cell-wall-degrading enzymes (PCWDEs) compared with their brown-rot relatives. However, the various lineages retain distinct sets of PCWDEs, suggesting that, over their evolutionary history, symbiotic Boletales have become functionally diverse. A smaller PCWDE repertoire was found in Sclerodermatineae. The gene repertoire of several lignocellulose oxidoreductases (e.g. laccases) is similar in brown-rot and ectomycorrhizal species, suggesting that symbiotic Boletales are capable of mild lignocellulose decomposition. Transposable element (TE) proliferation contributed to the higher evolutionary rate of genes encoding effector-like small secreted proteins, proteases, and lipases. On the other hand, we showed that the loss of secreted CAZymes was not related to TE activity but to DNA decay. This study provides novel insights on our understanding of the mechanisms influencing the evolutionary diversification of symbiotic boletes.
Permanent Link: https://hdl.handle.net/11104/0340415