Transfer to forest nurseries significantly affects mycorrhizal community composition of Asteropeia mcphersonii wildings

Henry Charline, Raivoarisoa Jeanne-Françoise, Razafimamonjy Angélo, Ramanankierana Heriniaina, Andrianaivomahefa Paul, Ducousso Marc, Selosse Marc-André. 2017. Transfer to forest nurseries significantly affects mycorrhizal community composition of Asteropeia mcphersonii wildings. Mycorrhiza, 27 (4) : 321-330.

Quartile : Q2, Sujet : MYCOLOGY

Résumé : Mycorrhizal symbiosis is extremely important for tree growth, survival and resistance after transplantation particularly in Madagascar where deforestation is a major concern. The importance of mycorrhizal symbiosis is further increased when soil conditions at the planting site are limiting. To identify technical itineraries capable of improving ecological restoration in Madagascar, we needed to obtain native ectomycorrhizal (ECM) saplings with a wide diversity of ECM fungi. To this end, we transplanted ECM seedlings from the wild (wildlings) to a nursery. Using molecular characterisation of internal transcribed spacer (ITS) rDNA, we tested the effect of transplanting Asteropeia mcphersonii wildlings on ECM communities after 8 months of growth in the nursery. With or without the addition of soil from the site where the seedlings were sampled to the nursery substrate, we observed a dramatic change in the composition of fungal communities with a decrease in the ECM infection rate, a tremendous increase in the abundance of an operational taxonomic unit (OTU) taxonomically close to the order Trechisporales and the disappearance of all OTUs of Boletales. Transplanting to the nursery and/or to nursery conditions was shown to be incompatible with the survival and even less with the development in the nursery of most ECM fungi naturally associated with A. mcphersonii wildings.

Mots-clés Agrovoc : symbiose, ectomycorhize, pépinière forestière, repiquage, reconstitution forestière, croissance, restauration couverture végétale, mortalité, survie, Boletales, taxonomie, composition botanique

Mots-clés géographiques Agrovoc : Madagascar

Mots-clés complémentaires : Asteropeiaceae, Asteropeia mcphersonii, Trechisporales

Classification Agris : K01 - Foresterie - Considérations générales
P34 - Biologie du sol
F62 - Physiologie végétale - Croissance et développement

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

Auteurs et affiliations

• Henry Charline, AgroParisTech (FRA)
• Raivoarisoa Jeanne-Françoise, Ambatovy (MDG)
• Razafimamonjy Angélo, Ambatovy (MDG)
• Ramanankierana Heriniaina, CNRE [Centre National de Recherches sur l'Environnement] (MDG)
• Andrianaivomahefa Paul, Ambatovy (MDG)
• Ducousso Marc, CIRAD-BIOS-UMR LSTM (FRA)
• Selosse Marc-André, MNHN (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/584533/)

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