Agritrop
Home

Ectomycorrhizal fungal diversity associated with endemic Tristaniopsis spp. (Myrtaceae) in ultramafic and volcano-sedimentary soils in New Caledonia

Waseem Muhammad, Ducousso Marc, Prin Yves, Domergue Odile, Hannibal Laure, Majorel Clarisse, Jourand Philippe, Galiana Antoine. 2017. Ectomycorrhizal fungal diversity associated with endemic Tristaniopsis spp. (Myrtaceae) in ultramafic and volcano-sedimentary soils in New Caledonia. Mycorrhiza, 27 (4) : pp. 407-413.

Journal article ; Article de revue à facteur d'impact
[img] Version Online first - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
art%3A10.1007%2Fs00572-017-0761-4.pdf

Télécharger (930kB) | Request a copy
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
art%3A10.1007%2Fs00572-017-0761-4-edite.pdf

Télécharger (907kB) | Request a copy

Quartile : Q2, Sujet : MYCOLOGY

Abstract : New Caledonian serpentine (ultramafic) soils contain high levels of toxic heavy metals, in particular nickel, (up to 20 g kg−1) and are deficient in essential elements like carbon, nitrogen and phosphorus while having a high magnesium/calcium ratio. Although previous studies showed that ectomycorrhizal symbioses could play an important role in the adaptation of the endemic plants to ultramafic soils (FEMS Microbiol Ecol 72:238–49, 2010), none of them have compared the diversity of microbial communities from ultramafic vs non-ultramafic soils in New Caledonia. We explored the impact of edaphic characteristics on the diversity of ectomycorrhizal (ECM) fungi associated with different endemic species of Tristaniopsis (Myrtaceae) growing under contrasting soil conditions in the natural ecosystems of New Caledonia. ECM root tips were thus sampled from two different ultramafic sites (Koniambo massif and Desmazures forest) vs two volcano-sedimentary ones (Arama and Mont Ninndo). The molecular characterization of the ECM fungi through partial sequencing of the ITS rRNA gene revealed the presence of different dominant fungal genera including, both soil types combined, Cortinarius (36.1%), Pisolithus (18.5%), Russula (13.4%), Heliotales (8.2%) and Boletellus (7.2%). A high diversity of ECM taxa associated with Tristaniopsis species was found in both ultramafic and volcano-sedimentary soils but no significant differences in ECM genera distribution were observed between both soil types. No link could be established between the phylogenetic clustering of ECM taxa and their soil type origin, thus suggesting a possible functional—rather than taxonomical—adaptation of ECM fungal communities to ultramafic soils. (Résumé d'auteur)

Mots-clés Agrovoc : Ectomycorhize, Symbiose, Métal lourd, Nickel, Variation génétique, Adaptation physiologique, Organisme indigène, Cortinarius, Pisolithus, Russula, Myrtaceae, Écosystème forestier, Écosystème

Mots-clés géographiques Agrovoc : Nouvelle-Calédonie

Mots-clés complémentaires : Tristaniopsis, Heliotales, Boletellus

Classification Agris : P34 - Soil biology
K01 - Forestry - General aspects
F40 - Plant ecology

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Waseem Muhammad, INRA (FRA)
  • Ducousso Marc, CIRAD-BIOS-UMR LSTM (FRA)
  • Prin Yves, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-3706-0045
  • Domergue Odile, INRA (FRA)
  • Hannibal Laure, IRD (FRA)
  • Majorel Clarisse, IRD (FRA)
  • Jourand Philippe, IRD (NCL)
  • Galiana Antoine, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-5293-5049

Source : Cirad-Agritrop (https://agritrop.cirad.fr/583510/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2021-03-09 ]