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Convergent losses of decay mechanisms and rapid turnover of symbiosis genes in mycorrhizal mutualists

Annegret Kohler 1 Alan Kuo 2 Laszlo G Nagy 3, 4 Emmanuelle Morin 1 Kerrie W Barry 2 Francois Buscot 4, 5 Björn Canbäck 6 Cindy Choi 2 Nicolas Cichocki 1 Alicia Clum 2 Jan Colpaert 7 Alex Copeland 2 Mauricio D Costa 8 Jeanne Doré 9 Dimitrios Floudas 3 Gilles Gay 9 Mariangela Girlanda 10 Bernard Henrissat 11 Sylvie Herrmann 5 Jaqueline Hess 12 Nils Högberg 13 Tomas Johansson 6 Hassine-Radhouane Khouja 10 Kurt Labutti 2 Urs Lahrmann 14 Anthony Levasseur 11 Erika A Lindquist 2 Anna Lipzen 2 Roland Marmeisse 9 Elena Martino 1, 10 Claude Murat 1 Chew Y Ngan 2 Uwe Nehls 15 Jonathan M Plett 1 Anne Pringle 16 Robin A Ohm 2 Silvia Perotto 10 Martina Peter 17 Robert Riley 2 Francois Rineau 7 Joske Ruytinx 7 Asaf Salamov 2 Firoz Shah 6 Hui Sun 2 Mika Tarkka 5 Andrew Tritt 2 Claire Veneault-Fourrey 1 Alga Zuccaro 14, 18 Anders Tunlid 6 Igor V Grigoriev 2 David S Hibbett 3, * Francis Martin 1, *
Abstract : To elucidate the genetic bases of mycorrhizal lifestyle evolution, we sequenced new fungal genomes, including 13 ectomycorrhizal (ECM), orchid (ORM) and ericoid (ERM) species, and five saprotrophs, which we analyzed along with other fungal genomes. Ectomycorrhizal fungi have a reduced complement of genes encoding plant cell wall-degrading enzymes (PCWDEs), as compared to their ancestral wood decayers. Nevertheless, they have retained a unique array of PCWDEs, thus suggesting that they possess diverse abilities to decompose lignocellulose. Similar functional categories of nonorthologous genes are induced in symbiosis. Of induced genes, 7-38% are orphan genes, including genes that encode secreted effector-like proteins. Convergent evolution of the mycorrhizal habit in fungi occurred via the repeated evolution of a 'symbiosis toolkit', with reduced numbers of PCWDEs and lineage-specific suites of mycorrhiza-induced genes.
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Contributor : Chantal Baracco <>
Submitted on : Thursday, April 9, 2015 - 4:19:43 PM
Last modification on : Thursday, March 4, 2021 - 3:32:02 PM

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Annegret Kohler, Alan Kuo, Laszlo G Nagy, Emmanuelle Morin, Kerrie W Barry, et al.. Convergent losses of decay mechanisms and rapid turnover of symbiosis genes in mycorrhizal mutualists. 2015, pp.410-5. ⟨10.1038/ng.3223⟩. ⟨hal-01140842⟩



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