Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi
| Autor: | Jasmyn Pangilinan, Peter G. Kennedy, Nhu H. Nguyen, Kurt LaButti, Hui-Ling Liao, Igor V. Grigoriev, William Andreopoulos, Sara Branco, Alan Kuo, Jason E. Stajich, Robert Riley, Hope Hundley, Joske Ruytinx, Hyunsoo Na, Anna Lipzen, Lotus A. Lofgren, Rytas Vilgalys, Kerrie Barry |
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| Přispěvatelé: | Plant Genetics, Microbiology, Department of Bio-engineering Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genome evolution Suillus Physiology Genomics Plant Science Biology Generalist and specialist species 01 natural sciences Genome Article Evolution Molecular 03 medical and health sciences Mycorrhizae Gene family Comparative genomics Host (biology) Fungi biology.organism_classification Pinus 030104 developmental biology Evolutionary biology Genome Fungal 010606 plant biology & botany Specialization |
| Zdroj: | New Phytol |
| Popis: | While there has been significant progress characterizing the 'symbiotic tool kit' of ectomycorrhizal (ECM) fungi, how host specificity may be encoded into ECM fungal genomes remains poorly understood. We conducted a comparative genomic analysis of ECM fungal host specialists and generalists, focusing on the specialist genus Suillus. Global analyses of genome dynamics across 46 species were assessed, along with targeted analyses of three classes of molecules previously identified as important determinants of host specificity: small secreted proteins (SSPs), secondary metabolites (SMs), and G-protein coupled receptors (GPCRs). Relative to other ECM fungi, including other host specialists, Suillus had highly dynamic genomes including numerous rapidly evolving gene families and many domain expansions and contractions. Targeted analyses supported a role for SMs but not SSPs or GPCRs in Suillus host specificity. Phylogenomic-based ancestral state reconstruction identified Larix as the ancestral host of Suillus, with multiple independent switches between white and red pine hosts. These results suggest that like other defining characteristics of the ECM lifestyle, host specificity is a dynamic process at the genome level. In the case of Suillus, both SMs and pathways involved in the deactivation of reactive oxygen species appear to be strongly associated with enhanced host specificity. |
| Databáze: | OpenAIRE |
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