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Braz. j. microbiol ; 39(3): 423-426, July-Sept. 2008. graf, tab
Article in English | LILACS | ID: lil-494525

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.


Nosso objetivo foi comparar as propriedades PGPR (rizobactérias promotoras de crescimento de plantas) de Bacillus subtilis e Pseudomonas aeruginosa. Solanum licopersicum (tomate), Asbelmoschus esculentus (ocra) e Amaranthus sp (espinafre africano) foram inoculados com as culturas bacterianas. Após 60 dias de plantio, a biomassa seca das plantas tratadas com B.subtilis e P. aeruginosa aumentou 31 por cento para o tomate, 36 por cento e 29 por cento para ocra, e 83 por cento e 40 por cento para espinafre africano, respectivamente, em comparação com o controle não inoculado. Considerando os parâmetros testados, o desempenho dos dois microrganismos foi similar, sem diferença estatisticamente significativa (p< 0,05).


Subject(s)
Biomass , Bacillus subtilis/growth & development , Bacillus subtilis/isolation & purification , In Vitro Techniques , Pseudomonas aeruginosa/growth & development , Pseudomonas aeruginosa/isolation & purification , Plants/growth & development , Methods , Reference Standards , Polymerase Chain Reaction , Methods
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