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. 2008 Jul;39(3):423-6.
doi: 10.1590/S1517-83822008000300003. Epub 2008 Sep 1.

Comparison of plant growth-promotion with Pseudomonas aeruginosa and Bacillus subtilis in three vegetables

A O Adesemoye  1 , M Obini, E O Ugoji
Affiliations

Comparison of plant growth-promotion with Pseudomonas aeruginosa and Bacillus subtilis in three vegetables

A O Adesemoye et al. Braz J Microbiol. 2008 Jul.

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% for tomato, 36% and 29% for okra, and 83% and 40% 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.

Keywords: Bacillus subtilis; PGPR; Pseudomonas aeruginosa; growth promotion.

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Figures

Figure 1
Figure 1
Comparison of plant shoot heights of three vegetable species inoculated with two PGPR. Bars with different letters are significantly different at P < 0.05, Least Significant Difference test.
Figure 2
Figure 2
In the treatments above B is B. subtilis, P is P. aeruginosa, and C is Control (without inoculant). The numbers in the box represent test plants – 1, 2, 3 are tomato, okra and African spinach respectively. Dry weight (Drywgt) on the vertical axis is in gram. DAP means days after planting.
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References

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