Phosphate-solubilization activity of bacterial strains in soil and their effect on soybean growth under greenhouse conditions

By L. Fernández, P. Zalba, M. Gómez, M. Sagardoy. Biology and Fertility of Soils, 2007

225 citations recorded by the source corpus.

The efficiency of 13 phosphate-solubilizing bacteria (PSB; four Burkholderia sp., five Enterobacter sp., and four Bradyrhizobium sp.) was assessed in a soil plate assay by evaluating soil phosphorus (P) availability. A commercial argentine strain, Pseudomonasfluorescens, was used for comparing solubilizing activity. Burkholderia sp. PER2F, Enterobacter sp. PER3G, and Bradyrhizobium sp. PER2H strains solubilized the largest quantities of P in the soil plate assay after 60 days as compared with the other strains, including the commercial one. The effect of PSB inoculation on growth and nutrient uptake of soybean plants was also studied under greenhouse conditions. Plants inoculated with Burkholderia sp. PER2F had the highest aerial height and showed an appropriate N/P ratio. However, none of the PSB increased P uptake by plants. This suggests that PSB inoculation does not necessarily improve P nutrition in soybean, nor was there any relationship between P availability in the soil plate assay and P content in the soybean shoot in the greenhouse. We concluded that the selection of efficient PSB strains as possible inoculation tools for P-deficient soils should focus on the integral interpretation of soil assays, greenhouse experiments, and field trials.

Subfields: Plant Science

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Citations in the corpus

Enhancing phosphorous availability to canola (Brassica napus L.) using P solubilizing and sulfur oxidizing bacteria (2010, background): “The great advantages of plant growth promoting rhizobacteria (PGPR) including P solubilizing bacteria on enhanced plant growth have been previously observed by different scientists (Kim et al., 1998; Fernandez et al., 2007).”
Beneficial Soil Microorganisms, an Ecological Alternative for Soil Fertility Management (2011, background): “However, the P content of the plants did not increase (Fernández et al. 2007).”
Solubilization of inorganic phosphates and plant growth promotion by strains of Pseudomonas fluorescens isolated from acidic soils of Cameroon (2008, background): “E-mail: dnwaga@yahoo.fr. of phosphate ions with numerous soil constituents (Rodriguez and Fraga, 1999; Fernandez et al., 2007).”
Isolation and characterization of phosphate-solubilizing bacteria from walnut and their effect on growth and phosphorus mobilization (2011, background): “Trials associated with rhizosphere PSB indicated growth and yield increase in maize (Hameeda et al. 2008), sorghum (Jisha and Alagawadi 1996; Alagawadi and Gaur 1992), wheat (Mukherjee and Rai 2000; Singh and Kapoor 1999), soybean ( Fernandez et al. 2007 ), sugar beet (Sahin et al. 2004), chickpea (”
Response of alfalfa (Medicago sativa L.) to single and mixed inoculation with phosphate-solubilizing bacteria and Sinorhizobium meliloti (2010, background): “The main strains able to perform this conversion belong to the genera Pseudomonas, Mycobacterium, Micrococcus, Bacillus, Achromobacter, Erwinia, Agrobacterium, Burkholderia, Flavobacterium, Rhizobium, Mesorhizobium ,a ndSinorhizobium (Rodriguez and Fraga 1999; Fernandez et al. 2007 ).”
Phosphate solubilization and growth promotion by Pseudomonas fragi CS11RH1 (MTCC 8984), a psychrotolerant bacterium isolated from a high altitude Himalayan rhizosphere (2009, background): “But role of phosphate solubilizing microorganisms in enhancing the P uptake of plants was not clearly observed in the case of barley and chick pea (Oehl et al. 2001) and soybean (Fernandez et al. 2007).”
Rhizosphere: its structure, bacterial diversity and significance (2014, background): “…Arthrobacter, Flavobacterium, Burkholderia, Bradyrhizobium, Mesorhizobium, Rhodococcus and Serratia, etc. (Berg 2000; Berg et al. 2002; Sobral et al. 2004; Sessitsch et al. 2005; Chen et al. 2006; Fischer et al. 2006; Fernandez et al. 2007; Naik et al. 2008; Ahmad et al. 2008; Soltani et al. 2010).”
Tricalcium phosphate is inappropriate as a universal selection factor for isolating and testing phosphate-solubilizing bacteria that enhance plant growth: a proposal for an alternative procedure (2013, background): “Fernández et al. (2007) tested 13 efficient TCP-solubilizing strains from soil and found that none promoted plant growth nor improved plant P nutrition.”
Solubilization of Phosphorus by Soil Microorganisms (2011, background): “Despite this, some PSM isolates have been successfully translated from the laboratory to the field whilst others have failed (Fernández et al. 2007).”