Genetics of phosphate solubilization and its potential applications for improving plant growth-promoting bacteria

Rodríguez, Humberto; Vidal, Reinaldo Fraga; González, Tania; Bashan, Yoav

doi:10.1007/978-1-4020-5765-6_2

Cited by 191 publications

(240 citation statements)

References 39 publications

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“…The phosphatase production starts when the phosphate pool is depleted. Therefore, it has been suggested that the phosphatase activity in a water body is an index of phosphorus nutritional status of the system [5,23]. In the present study also, higher phosphatase producing bacterial population density and higher amount of total phosphate in the water column was observed during monsoon season.…”

Section: Resultssupporting

confidence: 69%

Dynamics and diversity of phosphate mineralizing bacteria in the coral reefs of Gulf of Mannar

Ethiraj

Ravindran

2011

J. Basic Microbiol.

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Phosphatase Producing Bacteria (PPB) and Inorganic Phosphate Solubilizing Bacteria (IPSB) are important to reef nutrition. These microbes and phosphate concentration play a significant role in the productivity of coral reef ecosystems. A study was conducted in Gulf of Mannar coral reef ecosystem to understand the diversity of these groups of bacteria and their competence in mineralizing the phosphate. The PPB isolates were identified under six genera i.e. Bacillus, Pseudomonas, Micrococcus, Vibrio, Arthrobacter and Brevibacterium. Likewise, the IPSB isolates were also identified that belong to six genera i.e. Bacillus, Arthrobacter, Pseudomonas, Flavobacterium, Flavomonas and Micrococcus. Among the PPB and IPSB strains, Bacillus represented more number of species than others. PPB exhibited maximum activity between pH 8 and 9 and the lowest was at pH 6. Among the phosphatase producers Bacillus cereus (546) showed maximum activity (0.333 mmol/l P) at pH 8. In general, the phosphatase activity in most of the Bacillus species varied with reference to different pH. The species Bacillus megaterium (573) showed highest phosphate solubilizing activity (0.906 mmol/l P) by producing 2-ketogluconic acid. The production of organic acids and phosphatase enzymes by these bacterial groups are responsible for the conversion of insoluble inorganic and organic phosphates into soluble forms which are available for the reef organisms.

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Section: Resultssupporting

confidence: 69%

Dynamics and diversity of phosphate mineralizing bacteria in the coral reefs of Gulf of Mannar

Ethiraj

Ravindran

2011

J. Basic Microbiol.

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“…A large proportion of the methods used for the initial screening of PSM involve the use of solid or semi-solid culture media and tricalcium phosphate as a P source (Rodriguez andFraga 1999, Oliveira et al 2009). Considering the diversity of species exhibiting P solubilization capacity selected using Figure 4 -Average pH and mineralized P (mg L -1 ) in NBRIP medium supplemented with soy lecithin for endophytic bacteria isolated from "Prata Anã" banana tree roots.…”

Section: Discussionmentioning

confidence: 99%

Phosphate solubilization by endophytic bacteria isolated from banana trees

Matos

Gomes

Nietsche

et al. 2017

An. Acad. Bras. Ciênc.

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Forty isolates of endophytic bacteria isolated from banana tree roots were assessed as to their capacity to solubilize phosphate in a solid culture medium supplemented with different inorganic and one organic source of phosphorus. The amount of phosphorus (P) in each liquid medium was quantified, and an indirect assessment of acid phosphatase activity was performed. All assays had a fully randomized design, with three repetitions. Approximately 67.5% of the 40 isolates assessed in solid medium solubilized phosphorus from tricalcium phosphate and 7.5% of the isolates solubilized phosphorus from soy lecithin; no isolates exhibited P solubilization capacity in medium supplemented with iron phosphate . Acid phosphatase activity was detected in 65% of the isolates; Aneurinibacillus sp. and Lysinibacillus sp. isolates presented with the best solubilization indexes. All of the assessed isolates exhibited a capacity to reduce the potential of hydrogen in liquid medium supplemented with tricalcium phosphate. Isolate EB. 78 (Bacillus sp.) exhibited P solubilization capacity in solid media when Ca 3 (PO 4 ) 2 and soy lecithin were used as P sources; this isolate significantly reduced the pH of the liquid medium and exhibited acid phosphatase activity. The results of the present study highlight isolates that exhibit variations in their capacity to solubilize P. These isolates should be used in future tests to assess their field performance.

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“…Genetic manipulation of plants and microorganisms for key traits that are known to be associated with P mobilization or growth promotion (e.g. extracellular phytase and genes for synthesis and/or release of organic anions by plants and microorganisms; Gyaneshwar et al, 2002;George et al, 2005a;Rodriguez et al, 2006), along with generation of specific mutants in key target genes for particular traits (e.g. organic anion release in Pseudomonas spp., Miller et al, 2010), are useful for both elucidation of mechanisms and for quantifying their contribution to increased P availability in soil.…”

Section: Ecological Considerations and Future Prospectsmentioning

confidence: 99%

Soil Microorganisms Mediating Phosphorus Availability Update on Microbial Phosphorus

2011

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Genetics of phosphate solubilization and its potential applications for improving plant growth-promoting bacteria

Cited by 191 publications

References 39 publications

Dynamics and diversity of phosphate mineralizing bacteria in the coral reefs of Gulf of Mannar

Dynamics and diversity of phosphate mineralizing bacteria in the coral reefs of Gulf of Mannar

Phosphate solubilization by endophytic bacteria isolated from banana trees

Soil Microorganisms Mediating Phosphorus Availability Update on Microbial Phosphorus

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