Resumen

AGUIRRE-MEDINA, Juan Francisco; AGUIRRE-CADENA, Juan Francisco  y  RAMON-CASTRO, Miguel Antonio. Growth of Tabebuia donnell-smithii Rose inoculated with arbuscular mycorrhizal fungi and rhizobacteria. Rev. mex. de cienc. forestales [online]. 2016, vol.7, n.36, pp.99-112. ISSN 2007-1132.

Tabebuia donnell-smithii is a timber tree with economic and ecological importance in the tropical regions of Mexico, whose natural populations have declined, due, among other reasons, to its slow growth during its establishment. The effect on their growth and nutrition of the inoculation with Rhizophagus intraradices, Azospirillum brasilense and Pseudomonas fluorescens was investigated in Tabebuia plants. The fungus and bacteria were applied in the seeds in combinations of two or three of the following microorganisms: A. brasilense 9 x 106 UFC g of peat-1, R. intraradices with 40 spores g of sterile soil-1 and roots 95 % colonized and P. fluorescens with 9 x 106 UFC g of peat-1 plus the control. They were sown in pots with a non-sterile mixture of Molic andosol soil and washed river sand, 1: 1 (v / v). In total, five treatments were established, with five replications distributed in a completely randomized design. Five destructive samplings were carried out: the first one at 45 days after sowing and the next every 28 days. Morphological and physiological yield variables were recorded. Treatments increased plant growth, with the exception of the two bacteria together after 158 days. The corresponding to P. fluorescens - R. intraradices and that of the three microorganisms induced more biomass in the greater number of morphological and physiological components of yield. The highest content of N and P in plant tissue was obtained with the three microorganisms and with the combination R. intraradices - A. brasilense.

Palabras llave : Azospirillum brasilense Tarrand; Krieg & Döbereiner; aerial biomass; root biomass; inoculation; Pseudomonas fluorescens Migula; Rhizophagus intraradices (Schenck & Sm.) Walker & Schuessler.

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