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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Phenotypic and genotypic characterizations of rhizobia isolated from root nodules of peanut (Arachis hypogaea L.) grown in Moroccan soils
Journal of Basic Microbiology, Volume 49, No. 5, Year 2009
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Description
The phenotypic and genotypic characterization of sixty-two rhizobial isolates obtained from nodules of Arachis hypogaea in north-western Morocco was performed. Their physiological and biochemical properties revealed a great deal of diversity among them. Isolates were classified into two major groups based on the numerical analysis of their phenotypic and genotypic characteristics. Isolates in the first group were alkali- and salt-sensitive, slow or extra-slow growers; they did not use disaccharides as carbon source and varied in the use of amino acids. ARDRA analysis of the 16S rDNA region grouped them together with reference strains belonging to the genus Bradyrhizobium. In the second group, isolates were fast growers, acidsensitive, and alkali- and salt-tolerant; they used both mono and disaccharides as carbon sources, and methionine was the only amino acid they could metabolize as a nitrogen source. ARDRA analysis grouped them with fast-growing reference strains. Both groups exhibited a range of variability in tolerance to heavy metals. The Intergenic Spacer (IGS)-PCR fingerprinting analysis confirmed a high genotypic diversity at the strain level. This characterization provides a basis for the selection of peanut-nodulating rhizobia which may have applications in formulating appropriate inocula for improving peanut crop yield on Moroccan soils, including saline and acidic marginal areas. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors & Co-Authors
El-Akhal, M. Rabie
Morocco, Tangier
Faculté Des Sciences et Techniques de Tanger
Spain, Madrid
Csic - Instituto de Recursos Naturales Irn
Rincón, Ana María
Spain, Madrid
Csic - Instituto de Recursos Naturales Irn
El Mourabit, Nourdin
Morocco, Rabat
Institut National de la Recherche Agronomique, Morocco
Pueyo, José J.
Spain, Madrid
Csic - Instituto de Recursos Naturales Irn
Barrijal, Said
Morocco, Tangier
Faculté Des Sciences et Techniques de Tanger
Statistics
Citations: 18
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1002/jobm.200800359
ISSN:
0233111X
e-ISSN:
15214028
Research Areas
Environmental
Study Locations
Morocco