Genetic diversity and host plant preferences revealed by simple sequence repeat and mitochondrial markers in a population of the arbuscular mycorrhizal fungus Glomus intraradices.

Détails

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_48A796FD4F50
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genetic diversity and host plant preferences revealed by simple sequence repeat and mitochondrial markers in a population of the arbuscular mycorrhizal fungus Glomus intraradices.
Périodique
New Phytologist
Auteur(s)
Croll D., Wille L., Gamper H.A., Mathimaran N., Lammers P.J., Corradi N., Sanders I.R.
ISSN
1469-8137[electronic], 0028-646X[linking]
Statut éditorial
Publié
Date de publication
2008
Volume
178
Numéro
3
Pages
672-687
Langue
anglais
Résumé
Arbuscular mycorrhizal fungi (AMF) are important symbionts of plants that improve plant nutrient acquisition and promote plant diversity. Although within-species genetic differences among AMF have been shown to differentially affect plant growth, very little is actually known about the degree of genetic diversity in AMF populations. This is largely because of difficulties in isolation and cultivation of the fungi in a clean system allowing reliable genotyping to be performed. A population of the arbuscular mycorrhizal fungus Glomus intraradices growing in an in vitro cultivation system was studied using newly developed simple sequence repeat (SSR), nuclear gene intron and mitochondrial ribosomal gene intron markers. The markers revealed a strong differentiation at the nuclear and mitochondrial level among isolates. Genotypes were nonrandomly distributed among four plots showing genetic subdivisions in the field. Meanwhile, identical genotypes were found in geographically distant locations. AMF genotypes showed significant preferences to different host plant species (Glycine max, Helianthus annuus and Allium porrum) used before the fungal in vitro culture establishment. Host plants in a field could provide a heterogeneous environment favouring certain genotypes. Such preferences may partly explain within-population patterns of genetic diversity.
Mots-clé
DNA, Fungal/genetics, DNA, Mitochondrial/genetics, Genetic Markers/genetics, Genetic Variation, Genotype, Mycorrhizae/genetics, Phylogeny, Plants/microbiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 18:38
Dernière modification de la notice
08/05/2019 18:05
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