Abstract

ROJAS-BADIA, Marcia M. et al. Plant growth promotion of commercial vegetable crops by Bacillus strains. Acta Agron. [online]. 2020, vol.69, n.1, pp.54-60. ISSN 0120-2812.  https://doi.org/10.15446/acag.v69n1.79606.

The use of plant growth promoting bacteria can substitute partially the chemical fertilizers, which put up the price of agricultural products and have negative effects over the environment. The aim of this work was to evaluate the potentialities of Bacillus strains for the plant growth promotion in different economical important crops. Four strains of Bacillus were used: two isolated from maize (Zea maíz L.) hybrid cultivar P-7928 and two from coffee (Cojjeea arabica L.) Caturra rojo cultivar. The strains showed positive effect in the seed germination of maize using index such as: germination percentage, germination index, vigor index and germination rate. Following greenhouse assays were carried out in maize, tomato and carrot. The strains stimulated the germination in maize but not all had the stimulation effect in the same indicators in the maize crop, although the strains RM5, RC9 and RC15 were the best in the root dry weight. In tomato and carrot crops, the results were variables, so it is necessary deeper in the study of plant-bacteria interaction.

Keywords : carrot; maize; plant growth promoting bacteria; tomato.

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