EvaluatingPseudomonas aeruginosaas plant growth-promoting rhizobacteria in West Africa

Abstract

Some parameters of growth were examined in three test crops as indices of plant growth-promoting rhizobacteria (PGPR) ability of Pseudomonas aeruginosa. Crops include Abelmoschus esculentus L. (okra), Lycopersicon esculentum L. (tomato) and Amaranthus sp. (African spinach). This study aimed to examine the effectiveness of PGPR in West Africa and determine whether the inoculation method has an impact on PGPR's effectiveness. Bacterium was isolated from topsoil in the Botanical Garden, University of Lagos, Nigeria. Inoculation with bacteria was done by soaking seeds in 10 6 cfu/ml of bacterial suspension and coating was done using 10% starch (w/v) as seed adhesive with 10 6 cfu/ml of bacterial suspension. The third treatment involved soaking seeds in distilled water and later applying NPK 15:15:15 fertilizer. Control seeds were soaked in distilled water. Two methods of bacterial inoculation (soaking and coating) produced statistically similar results to plants grown with fertilizer but performed better than the control, suggesting a high potential of P. aeruginosa as PGPR.

Role of plant growth promoting rhizobacteria in sustainable production of vegetables: Current perspective

“…In this regard, the free living PGPR has been used to supply important nutrients to plants and have consequently enhanced the growth and development of vegetables (Table 2). For example, Adesemoye and Ugoji (2006) in a study conducted in Nigeria assessed the efficacy of Pseudomonas sp. against three crops like, okra, tomato, and African spinach (Amaranthus sp.).…”

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

“…Soil was analyzed as reported previously (1). Bacillus subtilis was isolated from the soil and to do that, 9 ml of distilled water was added to 1 g of soil sample in a macrophage tube.…”

“…The plates were incubated aerobically at 37ºC for 48 h (3,7). Identification of B. subtilis was done by physiological and standard biochemical tests (2,4) but the previously identified P. aeruginosa (1) was used in this study.…”

Application of plant growth-promoting rhizobacteria (PGPR) in combination with a mild strain ofCucumber mosaic virus(CMV) associated with viral satellite RNAs to enhance growth and protection against a virulent strain of CMV in tomato

“…Many fluorescent Pseudomonas strains (e.g. P. aeruginosa) which colonize the rhizosphere, exert a protective effect on the roots through the production of in situ antibiotic compounds that promote growth and prevent microbial infections (Adesemoye & Ugoji, 2009;De Meyer et al, 1999). Stenotrophomonas species, belonging phylogenetically to γ -Proteobacteria, have an important ecological role in the elemental cycle of nature, degradation of xenobiotic compounds, promotion of plant growth and as a biocontrol agent against certain pathogenic fungi (Wolf et al, 2002).…”

“…Pseudomonas is a diverse group of Gram-negative, aerobic heterotrophic bacteria found in soil; some are aquatic, some can be found in animals. Individual Pseudomonas strains may have biocontrol activity, plant growth-promoting activity, the ability to induce systemic plant defence responses or the ability to act as pathogens (Adesemoye & Ugoji, 2009). Many fluorescent Pseudomonas strains (e.g.…”