Resumo

LARA, CECILIA; OVIEDO, LUIS  e  ALEMAN, ARNULFO. STRAIN NATIVE WITH POTENTIAL IN THE ACETIC ACID PRODUCTION INDOL TO IMPROVE THE AGRICULTURE. Rev.Bio.Agro [online]. 2011, vol.9, n.1, pp.17-23. ISSN 1692-3561.

In the present investigation 90 microorganisms of the Azotobacter sp and Azospirillum sp strains were isolated, from grounds of the rizosfera of cultures of banana, maize, grass, yucca, cotton and field of stubble (zones without cultivating) of the Zone of the Sinu in the Department of Cordoba (Colombia). The populations were evaluated in presence of Tryptophan and the production of IndolAcetico Acid (AIA) was obtained a ranging from 3.0 to 45.0 ppm; the determination was realised by colorimetric technique using the reagent of Salkowski. The technique was modified, adapted and standardized. Once was that isolated of the Azotobacter starin found in zones of left-overs concentrated the greater mass artillery fire of the auxin: 44,726 ppm. The strain of the Azotobacter from of zones without cultivating exhibiting highest IAA production: 44,726 ppm.

Palavras-chave : Azotobacter sp; Azospirillum sp; auxin: AIA; Reagent of Salkowski.

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