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  Functional diversity of the litter-associated fungi from an oxalate-carbonate pathway ecosystem in Madagascar

Hervé, V., Simon, A., Randevoson, F., Cailleau, G., Rajoelison, G., Razakamanarivo, H., et al. (2021). Functional diversity of the litter-associated fungi from an oxalate-carbonate pathway ecosystem in Madagascar. Microorganisms, 9(5): 985. doi:10.3390/microorganisms9050985.

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https://doi.org/10.3390/microorganisms9050985 (Publisher version)
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 Creators:
Hervé, Vincent1, 2, 3, Author           
Simon, Anaele, Author
Randevoson, Finaritra, Author
Cailleau, Guillaume, Author
Rajoelison, Gabrielle, Author
Razakamanarivo, Herintsitohaina, Author
Bindschedler, Saskia, Author
Verrecchia, Eric, Author
Junier, Pilar, Author
Affiliations:
1Max Planck Institute for Terrestrial Microbiology, Max Planck Society, Karl-von-Frisch-Strasse 10, D-35043 Marburg, DE, ou_3135468              
2Laboratory of Biogeosciences, Institute of Earth Surface Dynamics, University of Lausanne, Switzerland, ou_persistent22              
3Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, Switzerland, ou_persistent22              

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Free keywords: Kirindy forest Tamarindus indica calcium oxalate crystals carbon cycle litter oxalogenic tree oxalotrophy design of the study in the collection, analyses, or interpretation of data in the writing of the manuscript, or in the decision to publish the results.
 Abstract: The oxalate-carbonate pathway (OCP) is a biogeochemical process linking oxalate oxidation and carbonate precipitation. Currently, this pathway is described as a tripartite association involving oxalogenic plants, oxalogenic fungi, and oxalotrophic bacteria. While the OCP has recently received increasing interest given its potential for capturing carbon in soils, there are still many unknowns, especially regarding the taxonomic and functional diversity of the fungi involved in this pathway. To fill this gap, we described an active OCP site in Madagascar, under the influence of the oxalogenic tree Tamarindus indica, and isolated, identified, and characterized 50 fungal strains from the leaf litter. The fungal diversity encompassed three phyla, namely Mucoromycota, Ascomycota, and Basidiomycota, and 23 genera. Using various media, we further investigated their functional potential. Most of the fungal strains produced siderophores and presented proteolytic activities. The majority were also able to decompose cellulose and xylan, but only a few were able to solubilize inorganic phosphate. Regarding oxalate metabolism, several strains were able to produce calcium oxalate crystals while others decomposed calcium oxalate. These results challenge the current view of the OCP by indicating that fungi are both oxalate producers and degraders. Moreover, they strengthen the importance of the role of fungi in C, N, Ca, and Fe cycles.

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Language(s): eng - English
 Dates: 2021-06-03
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: Other: 34062900
DOI: 10.3390/microorganisms9050985
ISSN: 2076-2607 (Print)2076-2607
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Title: Microorganisms
Source Genre: Journal
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Publ. Info: Basel : MDPI
Pages: - Volume / Issue: 9 (5) Sequence Number: 985 Start / End Page: - Identifier: ISSN: 2076-2607
CoNE: https://pure.mpg.de/cone/journals/resource/2076-2607