Resumen

PINA GUILLEN, Jesús; GARCIA MENESES, Virginia; HERRERA LOPEZ, Humberto  y  FLORES TORRES, Jesús Adolfo. Rating wild strains of Azospirillum sp. and Gluconacetobacter sp. as promoters of plant growth. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.7, pp.1613-1623. ISSN 2007-0934.

The current patterns of plant nutrition involve extensive use of chemical fertilizers that bring with it numerous side effects among which pollution of groundwater and progressive soil erosion, reflecting the urgent need for alternatives that allow replace efficiently those schemes. The proposal for this work alternative, developed in the facilities of the Technological University of Izucar de Matamoros in 2013, is to promote the use of bio-fertilizers prepared from indigenous bacteria in the region, for which, were performed assays in vitro and inplanta demonstrating its effect as plant growth promoters through mechanisms such as biological nitrogen fixation (FBN) and the production of growth regulators. Two strains were isolated using media lacking culture nitrogen, both characterized in part, the first of which belongs to the genus Azospirillum called M1 isolated from roots of Jatropha, the second genus Gluconacetobacter called G1 isolated from roots of sugar cane. In tests on cuttings of dragon fruit, corn plants and sugarcane both in vitro and in planta it was observed that both strains have the ability to promote the formation of lateral roots and that the number of these is higher compared to witnesses not it inoculated likewise, it was observed that the strain M1 has a similar effect on the G1 rhizogenesis strain and co-inoculation of both strains in these plant models.

Palabras llave : bacteria; bio-fertilizers; native.

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