Comparison of plant growth-promotion with Pseudomonas aeruginosa and Bacillus subtilis in three vegetables / Comparação da promoção de crescimento de plantas por Pseudomonas aeruginosa e Bacillus subtilis em três vegetais

ABSTRACT

Our objective was to compare some plant growth promoting rhizobacteria (PGPR) properties of Bacillus subtilis and Pseudomonas aeruginosa as representatives of their two genera. Solanum lycopersicum L. (tomato), Abelmoschus esculentus (okra), and Amaranthus sp. (African spinach) were inoculated with the bacterial cultures. At 60 days after planting, dry biomass for plants treated with B. subtilis and P. aeruginosa increased 31 percent for tomato, 36 percent and 29 percent for okra, and 83 percent and 40 percent for African spinach respectively over the non-bacterized control. Considering all the parameters tested, there were similarities but no significant difference at P < 0.05 between the overall performances of the two organisms.