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Genetic diversity and symbiotic efficiency of rhizobial isolates obtained from nodules of Arachis hypogaea in northwestern Morocco

AuthorsEl-Akhal, M. Rabie; Rincón, Ana ; Arenal, Fernando; Lucas, M. Mercedes ; El Mourabit, Nourdin; Barrijal, Said; Pueyo, José Javier
KeywordsArachis hypogaea
Nitrogen fixation
Issue Date2008
CitationSoil Biology and Biochemistry 40 :2911-2914 (2008)
AbstractThe molecular characterization of 62 rhizobial isolates obtained from root-nodules of Arachis hypogaea growing in north-western Morocco was performed. Bacteria were firstly characterized by restriction of the 16S-rDNA region, and phylogeny was inferred from 16S gene sequences. Phylogenetically, isolates were grouped with species belonging to the Bradyrhizobium and Rhizobium genera. A high degree of variability was detected among isolates in terms of their nitrogen-fixing ability. This is, to our knowledge, the first study on genetic diversity and symbiotic effectiveness of rhizobia isolated from peanut nodules grown in Morocco. This characterization provides a basis for the selection of peanut-nodulating rhizobia which may have applications in the formulation of appropriate inocula to improve peanut crop yield on Moroccan soils.
Description5 pages and figures
Publisher version (URL)http://dx.doi.org/10.1016/j.soilbio.2008.08.005
Appears in Collections:(IRN) Artículos
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