Association of highly and weakly mycorrhizal seedlings can promote the extra- and intraradical development of a common mycorrhizal network
Corresponding Author
Damien Derelle
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Correspondence: Damien Derelle, UPMC Paris 6 – CNRS UMR 7618, 46 rue d'Ulm, F-75230 Paris Cedex 05, France. Tel.: +33 1 44 32 38 78; fax: +33 1 44 32 38 85; e-mail: [email protected]Search for more papers by this authorStéphane Declerck
Mycology, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Search for more papers by this authorPatricia Genet
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Université Paris Diderot – Paris 7, Paris Cedex 13, France
Search for more papers by this authorIsabelle Dajoz
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Université Paris Diderot – Paris 7, Paris Cedex 13, France
Search for more papers by this authorIngrid M. van Aarle
Mycology, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Unit of Bioengineering, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Search for more papers by this authorCorresponding Author
Damien Derelle
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Correspondence: Damien Derelle, UPMC Paris 6 – CNRS UMR 7618, 46 rue d'Ulm, F-75230 Paris Cedex 05, France. Tel.: +33 1 44 32 38 78; fax: +33 1 44 32 38 85; e-mail: [email protected]Search for more papers by this authorStéphane Declerck
Mycology, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Search for more papers by this authorPatricia Genet
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Université Paris Diderot – Paris 7, Paris Cedex 13, France
Search for more papers by this authorIsabelle Dajoz
UPMC Paris 6, CNRS UMR 7618, Paris Cedex 05, France
Université Paris Diderot – Paris 7, Paris Cedex 13, France
Search for more papers by this authorIngrid M. van Aarle
Mycology, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Unit of Bioengineering, Earth and Life Institute, Université catholique de Louvain, Louvain-La-Neuve, Belgium
Search for more papers by this authorAbstract
Arbuscular mycorrhizal fungi (AMF) are key determinants of plant interactions in ecosystems. Through their effects on competition, they are regulators of the structure of communities. Conversely, the composition of plant assemblages may also influence the AMF colonization dynamics of plant species. Here, we tested under in vitro culture conditions the effects of Medicago truncatula, a highly mycorrhizal plant species, and Silene vulgaris, a weakly mycorrhizal plant species, grown single (monospecies treatments) or in combination (bispecies treatment) on the colonization dynamics of the AMF Rhizophagus irregularis MUCL 43194. The seedlings were placed in a pre-established hyphal network developing from a mature M. truncatula mycorrhizal donor plant. Extraradical mycelium (ERM) and root colonization parameters as well as root morphology were measured over a period of 12 days. An increased ERM length, total root colonization and proportion of arbuscules were noted in the bispecies treatment. Conversely, the bispecies treatment seemed to have no effect on root growth. This study also demonstrated the suitability of the in vitro culture system for studying the interactions between AMF and host plants grown as mono- and bispecies combinations.
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