Record ID No. |
5637 |
Author(s) |
Martino E.*, Morin E., Grelet G-A., Kuo A., Kohler A., Daghino S., Barry K. W., Cichocki N., Clum A., Dockter R. B., Hainaut M., Kuo R.C., LaButti K., Lindahl B. D., Lindquist E. A., Lipzen A., Khouja H-R., Magnuson J., Murat C., Ohm R. A., Singer S. W., , 2018 |
Affiliation |
*Department of Life Sciences and Systems Biology, University of Turin, Turin 10125, Italy. |
Title |
Comparative genomics and transcriptomics depict ericoid mycorrhizal fungi as versatile saprotrophs and plant mutualists. |
Source. Vol.(no):Page |
New Phytologist. 217: 1213-1229 |
Categories |
|
Subjects |
Genetics |
Host |
NA |
Organism |
Meliniomyces bicolor, M. variabilis, Oidiodendron maius, Rhizaoscyphus ericaea |
Abstracts |
Some soil fungi in the Leotiomycetes form ericoid mycorrhizal (ERM) symbioses with Eri-caceae. In the harsh habitats in which they occur, ERM plant survival relies on nutrient mobi-lization from soil organic matter (SOM) by their fungal partners. The characterization of the fungal genetic machinery underpinning both the symbiotic lifestyle and SOM degradation isneeded to understand ERM symbiosis functioning and evolution, and its impact on soil carbon(C) turnover. We sequenced the genomes of the ERM fungi Meliniomyces bicolor, M. variabilis, Oidiodendron maiusandRhizoscyphus ericae, and compared their gene repertoires withthose of fungi with different lifestyles (ecto- and orchid mycorrhiza, endophytes, saprotrophs,pathogens). We also identified fungal transcripts induced in symbiosis.The ERM fungal gene contents for polysaccharide-degrading enzymes, lipases, proteasesand enzymes involved in secondary metabolism are closer to those of saprotrophs andpathogens than to those of ectomycorrhizal symbionts. The fungal genes most highly upregu-lated in symbiosis are those coding for fungal and plant cell wall-degrading enzymes (CWDEs),lipases, proteases, transporters and mycorrhiza-induced small secreted proteins (MiSSPs).The ERM fungal gene repertoire reveals a capacity for a dual saprotrophic and biotrophiclifestyle. This may reflect an incomplete transition from saprotrophy to the mycorrhizal habit,or a versatile life strategy similar to fungal endophytes |