Genetic diversity and symbiotic efficiency of rhizobial isolates obtained from nodules of Arachis hypogaea in northwestern Morocco |
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| Authors: | M. Rabie El-Akhal Ana Rincón Francisco Arenal M. Mercedes Lucas Nouredin El Mourabit Said Barrijal José J. Pueyo |
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| Affiliation: | 1. Equipe de Recherche Valorisation Biotechnologique des Microorganismes (ERVBM), Département des Sciences de la Vie, Faculté des Sciences et Techniques, Tanger, Morocco;2. Department of Plant Physiology and Ecology, Instituto de Recursos Naturales, Centro de Ciencias Medioambientales, CSIC, Serrano 115-bis, E-28006 Madrid, Spain;3. Institut National de Recherche Agronomique (INRA) Tanger, Morocco |
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| Abstract: | The 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. |
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