Abstract

PEREZ-PEREZ, Reneé; PEREZ-MARTINEZ, Simón  and  ALMEIDA-ACOSTA, Iván. Effect of the inoculation of PGPR isolated from corn on the growth of this crop under controlled conditions. cultrop [online]. 2021, vol.42, n.3  Epub Sep 30, 2021. ISSN 1819-4087.

The application of inoculants formulated based on plant growth promoting rhizobacteria in crops of agricultural interest such as corn, represents an ecological alternative to the use of chemicals in agriculture. On the other hand, the use of native strains for the inoculation of plants could represent an advantage over the use of alien strains and, therefore, improve crop production. Consequently, the present work aimed to evaluate the inoculation effect of 20 bacterial strains, isolated from the rhizosphere of corn and previously characterized, corresponding to the genera Stenotrophomonas, Pseudomonas, Rhizobium and Enterobacter, in the development of morphoagronomic variables of its own culture. For this, inoculants were prepared with each of the strains in liquid LB medium. The inoculation was carried out on the corn seeds sown in unsterilized Red Ferrallitic soil, at a rate of 300 μl of inoculum per seed. The experiment was established under controlled conditions of light, relative humidity, temperature and irrigation and it was determined: plant height, root length, aerial dry mass, root dry mass and concentration of total chlorophylls, 30 days after inoculation. The best results were obtained with treatments inoculated with Stenotrophomonas sp. INCA-FRr1, Stenotrophomonas sp. INCA-FRc24 and Rhizobium sp. INCA-FRc1. This study represents the basis for the conception of a new bioproduct destined for the fertilization of corn crop.

Keywords : FBN; Stenotrophomonas; Rhizobium; nutrition; phytostimulation.

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