Rhizobial Populations in Soils from Natural "Acacia senegal" and "Acacia nilotica" Forests in Mauritania and the Senegal River Valley

• Amadou Sarr ^[4] ; Marc Neyra ^[5] ; Mouhamed Abdeljalil Ould Houeibib ^[1] ; Ibrahima Ndoye ^{[5] [2]} ; Abdallah Oihabi ^{[6] [3]} ; Didier Lesueur ^{[4] [7]}
  1. [1] University of Nouakchott

     University of Nouakchott

     Mauritania

     
  2. [2] Cheikh Anta Diop University

     Cheikh Anta Diop University

     Senegal

     
  3. [3] Cadi Ayyad University

     Cadi Ayyad University

     Marrakech-Medina, Marruecos

     
  4. [4] Dept. Forestier du CIRAD, UPR 80 “ETP”, Laboratoire Commun de Microbiologie (IRD/UCAD/ISRA), Dakar, Senegal
  5. [5] Laboratoire de Microbiologie des Sols de l'IRD, Dakar, Senegal
  6. [6] National Date Research and Development, Arabia Saudi
  7. [7] Dept. Forestier du CIRAD, UPR 80 “ETP”, Tropical Soil Biology and Fertility Institute of CIAT, Nairobi, Kenya

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• Localización: Microbial ecology, ISSN-e 1432-184X, ISSN 0095-3628, Vol. 50, Nº. 2, 2005, págs. 152-162
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Eighty-two strains of rhizobia were isolated from soils taken from several sites in Mauritania and Senegal. These soil samples were collected from natural stands of Acacia nilotica and Acacia senegal. The soils from Mauritania were less rich in native rhizobia than the soils from Senegal. The strains were characterized using polymerase chain reaction–restriction fragment length polymorphism and by sequencing the rDNA 16S–23S intergenic spacer region (IGS). They were sorted into seven IGS groups. These groups were not associated with the geographical origin of the strains or with the host-plant species at the site where the soils were collected. Most of the strains were in three of the IGS groups (I, IV, and V). One representative strain from each IGS group was sequenced and showed that the strains were from the genus Mesorhizobium. IGS groups I, IV, and VI were close to the species M. plurifarium (AF34563), IGS groups IIand III were close to the species Mesorhizobium sp. (AF510360), IGS group V was close to the species Mesorhizobium sp. (AF510366), and IGS group VII was close to Mesorhizobium sp. (AF510346).