Abstract
Majority of autotrophic plants and fungi associate with multiple mycorrhizal partners, with notable exceptions being Gnetum africanum, Pisonia grandis, and Alnus spp from the phytobiont perspective. We hypothesized that an understorey tree species Gnetum gnemon hosts a narrow range of mycobionts as shown in G. africanum and suggested for South American species. Sampling and molecular analysis of G. gnemon root tips revealed that besides Scleroderma spp. this gymnosperm tree associates with several fungal species from unrelated lineages. However, all Scleroderma isolates that associate with Gnetum spp. belong to a narrow clade close to Scleroderma sinnamariense. Our results demonstrate for the first time that specificity for mycobionts may substantially differ within an ectomycorrhizal plant genus.
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Acknowledgments
We thank I.J. Alexander for sharing unpublished sequence data of fungi associated with G. africanum. This study was funded by Estonian Science Foundation grants no 8235 and 9286 and FIBIR.
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Tedersoo, L., Põlme, S. Infrageneric variation in partner specificity: multiple ectomycorrhizal symbionts associate with Gnetum gnemon (Gnetophyta) in Papua New Guinea. Mycorrhiza 22, 663–668 (2012). https://doi.org/10.1007/s00572-012-0458-7
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DOI: https://doi.org/10.1007/s00572-012-0458-7