These authors contributed equally to this study
Medicago species affect the community composition of arbuscular mycorrhizal fungi associated with roots
Article first published online: 20 JUL 2007
Volume 176, Issue 1, pages 197–210, October 2007
How to Cite
Pivato, B., Mazurier, S., Lemanceau, P., Siblot, S., Berta, G., Mougel, C. and Van Tuinen, D. (2007), Medicago species affect the community composition of arbuscular mycorrhizal fungi associated with roots. New Phytologist, 176: 197–210. doi: 10.1111/j.1469-8137.2007.02151.x
- Issue published online: 13 AUG 2007
- Article first published online: 20 JUL 2007
- Received: 14 April 2007 Accepted: 7 May 2007
- annual medics;
- arbuscular mycorrhizal (AM) fungi;
- genetic diversity;
- large ribosomal subunit (LSU rDNA);
- quantitative polymerase chain reaction
- • Sequencing of the 5′ end of the large ribosomal subunit (LSU rDNA) and quantitative polymerase chain reaction (qPCR) were combined to assess the impact of four annual Medicago species (Medicago laciniata, Medicago murex, Medicago polymorpha and Medicago truncatula) on the genetic diversity of arbuscular mycorrhizal (AM) fungi, and on the relative abundance of representative AM fungal genotypes, in a silty-thin clay soil (Mas d’Imbert, France).
- • Two hundred and forty-six Glomeromycete LSU rDNA sequences from the four plant species and the bulk soil were analysed. The high bootstrap values of the phylogenetic tree obtained allowed the delineation of 12 operational taxonomic units (OTUs), all belonging to Glomus.
- • Specific primers targeting Glomeromycetes and major OTUs were applied to quantify their abundance by qPCR. Glomeromycetes and targeted OTUs were significantly more abundant in the root tissues than in the bulk soil, and the frequencies of three of them differed significantly in the root tissues of the different plant species.
- • These differences indicate that, despite the absence of strict host specificity in mycorrhizal symbiosis, there was a preferential association between some AM fungal and plant genotypes.