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Article Dans Une Revue New Phytologist Année : 2009

454 Pyrosequencing analyses of forest soils reveal an unexpectedly high fungal diversity

Marc Buée
Claude Murat
Emmanuelle Morin
Stéphane Uroz
Francis Martin
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Résumé

Soil fungi play a major role in ecological and biogeochemical processes in forests. Little is known, however, about the structure and richness of different fungal communities and the distribution of functional ecological groups (pathogens, saprobes and symbionts). Here, we assessed the fungal diversity in six different forest soils using tagencoded 454 pyrosequencing of the nuclear ribosomal internal transcribed spacer- 1 (ITS-1). No less than 166 350 ITS reads were obtained from all samples. In each forest soil sample (4 g), approximately 30 000 reads were recovered, corresponding to around 1000 molecular operational taxonomic units. Most operational taxonomic units (81%) belonged to the Dikarya subkingdom (Ascomycota and Basidiomycota). Richness, abundance and taxonomic analyses identified the Agaricomycetes as the dominant fungal class. The ITS-1 sequences (73%) analysed corresponded to only 26 taxa. The most abundant operational taxonomic units showed the highest sequence similarity to Ceratobasidium sp., Cryptococcus podzolicus, Lactarius sp. and Scleroderma sp. This study validates the effectiveness of high-throughput 454 sequencing technology for the survey of soil fungal diversity. The large proportion of unidentified sequences, however, calls for curated sequence databases. The use of pyrosequencing on soil samples will accelerate the study of the spatiotemporal dynamics of fungal communities in forest ecosystems.

Dates et versions

hal-02667034 , version 1 (31-05-2020)

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Citer

Marc Buée, Marlis Reich, Claude Murat, Emmanuelle Morin, R.H. Nilsson, et al.. 454 Pyrosequencing analyses of forest soils reveal an unexpectedly high fungal diversity. New Phytologist, 2009, 184 (2), pp.449-456. ⟨10.1111/j.1469-8137.2009.03003.x⟩. ⟨hal-02667034⟩
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