Abstract

FORNASERO, Laura Viviana; TONIUTTI, María Antonieta  and  ZUBER, Nicolás Emilio. Phenotypic and genotypic characterization of the rhizobial symbionts of macroptilium erythroloma recovered from soils in the provinces of corrientes and santa fe. Cienc. suelo [online]. 2018, vol.36, n.2, pp.64-73. ISSN 1850-2067.

Macroptilium erythroloma is a perennial legume of wide distribution in the north and centre of Argentina, which high lights among native forage for its productive potential. Towards the sustainable use of this legume, the isolation and evaluation of the phenotypic and genotypic of symbionts rhizobia of M. erythroloma recovered from soils in the provinces of Corrientes and Santa Fe are presented. The phenotypical characterization allows to recognize rhizobia of slow growing up which show an optimus development among a widerange of pH, temperaturas among 28 and 35°C, and with conditions of NaCl 0.5% (p/v). Rhizobia with growing conditions at pH 9 and 40°C were found. The profiles of amplification of genomic DNA (fingerprints) showed a strong genetic diversity among the isolations. Nodulating rhizobia biodiversity of M. erythroloma and the tolerance to abiotic factors establish a valuable tool towards the choosing of potential inoculant strains.

Keywords : native legumes; rhizobia nodulators; biodiversity.

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