Ectomycorrhizal communities associated with the legume Acacia spirorbis growing on contrasted edaphic constraints in New Caledonia

Houlès Anne, Vincent Bryan, David Magali, Ducousso Marc, Galiana Antoine, Juillot Farid, Hannibal Laure, Carriconde Fabian, Fritsch Emmanuel, Jourand Philippe. 2018. Ectomycorrhizal communities associated with the legume Acacia spirorbis growing on contrasted edaphic constraints in New Caledonia. Microbial Ecology, 76 : 964-975.

https://doi.org/10.1007/s00248-018-1193-1

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q1, Sujet : MARINE & FRESHWATER BIOLOGY / Quartile : Q1, Sujet : ECOLOGY / Quartile : Q2, Sujet : MICROBIOLOGY

Résumé : This study aims to characterize the ectomycorrhizal (ECM) communities associated with Acacia spirorbis, a legume tree widely spread in New Caledonia that spontaneously grows on contrasted edaphic constraints, i.e. calcareous, ferralitic and volcano-sedimentary soils. Soil geochemical parameters and diversity of ECM communities were assessed in 12 sites representative of the three mains categories of soils. The ectomycorrhizal status of Acacia spirorbis was confirmed in all studied soils, with a fungal community dominated at 92% by Basidiomycota, mostly represented by/tomentella-thelephora (27.6%), /boletus (15.8%), /sebacina (10.5%), /russula-lactarius (10.5%) and /pisolithus-scleroderma (7.9%) lineages. The diversity and the proportion of the ECM lineages were similar for the ferralitic and volcano-sedimentary soils but significantly different for the calcareous soils. These differences in the distribution of the ECM communities were statistically correlated with pH, Ca, P and Al in the calcareous soils and with Co in the ferralitic soils. Altogether, these data suggest a high capacity of A. spirorbis to form ECM symbioses with a large spectrum of fungi regardless the soil categories with contrasted edaphic parameters.

Mots-clés Agrovoc : ectomycorhize, facteur édaphique, Acacia

Mots-clés géographiques Agrovoc : Nouvelle-Calédonie, France

Mots-clés complémentaires : Acacia spirorbis

Mots-clés libres : Acacia, Ectomycorrhiza, Fungal diversity, New Caledonia, Soil constraints

Classification Agris : F60 - Physiologie et biochimie végétale

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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