AURIFERE
PORTAIL DOCUMENTAIRE DE L'INSTITUT SENEGALAIS DE RECHERCHES AGRICOLES
Elaboré par
L’Unité d’Information et de Valorisation des Résultats de la Recherche (UNIVAL)
'Un Accès Unique aux Ressources d’Information
et aux Fonds documentaires pour une Recherche d’Excellence
'
A partir de cette page vous pouvez :
/ F Diouf
PLOS ONE, In press. Genetic and GenomicDiversityStudies of AcaciaSymbionts in Senegal Reveal New Species of Mesorhizobiumwith a Putative Geographical Pattern [texte imprimé] / F Diouf, Auteur ; D. Diouf, Auteur ; A Klonowska, Auteur ; A Le Queré, Auteur ; N Bakhoum, Auteur ; D Fall, Auteur ; M Neyra, Auteur ; H Parrinello, Auteur ; I. Ndoye, Auteur ; L Moulin, Auteur . - 2015. Langues : Anglais ( eng) Catégories : | FORESTERIE
| Mots-clés : | Acacia Sénégal | Index. décimale : | K30-Génétique et amélioration des plantes forestiéres | Résumé : | Acacia senegal (L) Willd. and Acacia seyal Del. are highly nitrogen-fixing and moderately salt tolerant species. In this study we focused on the genetic and genomic diversity of Acacia mesorhizobia symbionts from diverse origins in Senegal and investigated possible correla- tions between the genetic diversity of the strains, their soil of origin, and their tolerance to sa- linity. We first performed a multi-locus sequence analysis on five markers gene fragments on a collection of 47 mesorhizobia strains of A. senegal and A. seyal from 8 localities. Most of the strains (60%) clustered with the M. plurifarium type strain ORS 1032T, while the others form four new clades (MSP1 to MSP4). We sequenced and assembled seven draft genomes: four in the M. plurifarium clade (ORS3356, ORS3365, STM8773 and ORS1032T), one in MSP1 (STM8789), MSP2 (ORS3359) and MSP3 (ORS3324). The average nucleotide identities be- tween these genomes together with the MLSA analysis reveal three new species of Mesorhi- zobium. A great variability of salt tolerance was found among the strains with a lack of correlation between the genetic diversity of mesorhizobia, their salt tolerance and the soils samples characteristics. A putative geographical pattern of A. senegal symbionts between the dryland north part and the center of Senegal was found, reflecting adaptations to specific local conditions such as the water regime. However, the presence of salt does not seem to be an important structuring factor of Mesorhizobium species. |
|
Exemplaires
Disponibilité |
---|
FT1900047 | K30- DIO | Publication | CNRF | Rayons | Exclu du prêt |
Documents numériques
Cliquer pour voirURL | | |