Synergistic effect of co-inoculation with phosphate-solubilizing bacteria

Abstract

The synergistic effect on phosphate solubilization of single-and co-inoculation of two phosphate solubilizing bacteria, Burkholderia anthina PSB-15 and Enterobacter aerogenes PSB-16, was assessed in liquid medium and green gram plants. Co-inoculation of two strains was found to release the highest content of soluble phosphorus (519 µg mL -1 ) into the medium, followed by single inoculation of Burkholderia strain (492 µg mL -1 ) and Enterobacter strain (483 µg mL -1 ).However, there was no significant difference between single inoculation of bacterial strain and co-inoculation of two bacterial strains in terms of phosphorous release. The highest pH reduction, organic acid production, and glucose consumption were observed in the culture medium co-inoculated with PSB-15 and PSB-16 strains rather than that of single inoculation. Based on the plant growth promotion bioassay, co-inoculated mung bean seedlings recorded 9% and 8% higher shoot and root growth, respectively, compared to the control. Therefore, in conclusion, co-inoculation of the strains B. anthina and E. aerogenes displayed better performance in stimulating plant growth than inoculation of each strain alone. However, considering the short assessment period of the present study, we recommend engaging in further work under field conditions in order to test the suitability of these strains as bio-inoculants.

Isolation and selection of highly effective phosphate solubilizing bacterial strains to promote wheat growth in Egyptian calcareous soils

“…Dominance of Enterobacter strains in the calcareous soils indicating that this family of bacteria is common and has unique capabilities for releasing phosphorus in such deteriorated soils which can help to solve the problems of phosphorus fertilization in a big sector of low soil productivity due to the alkalinity. Our results indicated also that strain ENPSB 1 identified as Enterobacter aerogenes and this consistent with similar findings by Park et al (2016) who confirmed the ability of this species to play an interesting role for phosphate solubilizing. Strain ENPSB 3 identified as Pantoea sp.…”

The Influence of The Isolated Enterobacter spp and Pantoea sp., on Barley’s Phosphorus Uptake Grown in Calcareous Soil

“…Coinoculated golden gramme seedlings grew faster than control. As a result, co-inoculation of the strains B. anthina and E. aerogenes outperformed solo vaccination with each strain in terms of increasing plant development (Jin-Hee et al, 2016). Ibáez et al, (2021) on the other hand, discovered that various isolates of phosphate solubilizing bacteria (PSB) from the barley rhizosphere may enhance the dry weight of plant ears.…”

Prospects of Potassium and Phosphate Solubilizing Bacteria for Nodulation Enhancement, growth and yield of Chickpea plant (Cicer arientinum L.)

“…The results are in agreement with the finding of (Kumar et al, 2010, Dhandapani, 2011, Khudhur, 2017. The P-solubilizing activity is related to the microbial biochemical potential to produce and release organic acids which their carboxylic groups chelate the cations (mainly Ca) bound to phosphate converting them into soluble forms (Kpomblekou-a and Tabatabai, 1994), as well as the positive correlation between soluble phosphours content and titratable acid production, suggested that acidification of the medium could facilities solubilizng of phosphorus (Park et al, 2016). Based on above results the most effective isolate of Pseudomonas putida chosen for most experiment.…”