Study on the scarcity of red tide in the eutrophicated waters of Ariake Bay. III. Conversion of AlPO4-P to Fe-bound P in sea sediments.

Ishio, Shinya; Kuwahara, Masaki; Nakagawa, Hisaki

doi:10.2331/suisan.52.901

Cited by 12 publications

(1 citation statement)

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“…Our results indicate that the values of soluble P released by the bacteria in NBRIP-BPB medium containing AlPO 4 were higher than those observed with FePO 4. Similar results were found by several authors when analyzing phosphate solubilizing ability (Gadagi and Sa, 2002;Fankem et al, 2008;Collavino et al, 2010) since aluminum phosphate is considerably more soluble than the corresponding ferric salt (Ishio et al, 1986;Fankem et al, 2008). The supernatantís pH values detected when the bacteria grew with FePO 4 or AlPO 4 , was lower than those detected in calcium phosphate (Anzuay et al, 2013).…”

Section: Discussionsupporting

confidence: 88%

Growth promotion of peanut ( Arachis hypogaea L.) and maize ( Zea mays L.) plants by single and mixed cultures of efficient phosphate solubilizing bacteria that are tolerant to abiotic stress and pesticides

Anzuay

Ciancio

Ludueña

et al. 2017

Microbiological Research

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The aims of this study were, to analyze in vitro phosphate solubilization activity of six native peanut bacteria and to determine the effect of single and mixed inoculation of these bacteria on peanut and maize plants. Ability to produce organic acids and cofactor PQQ, to solubilize FePO and AlPO and phosphatase activity were analyzed. Also, the ability to solubilize phosphate under abiotic stress and in the presence of pesticides of the selected bacteria was determined. The effect of single and mixed bacterial inocula was analyzed on seed germination, maize plant growth and in a crop rotation plant assay with peanut and maize. The six strains produced gluconic acid and five released cofactor PQQ into the medium. All bacteria showed ability to solubilize phosphate from FePO and AlPO and phosphatase activity. The ability of the bacteria to solubilize tricalcium phosphate under abiotic stress and in presence of pesticides indicated encouraging results. Bacterial inoculation on peanut and maize increased seed germination, plant́s growth and P content. Phosphate solubilizing bacteria used in this study showed efficient phosphate mineralizing and solubilization ability and would be potential P-biofertilizers for peanut and maize.

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Section: Discussionsupporting

confidence: 88%

Growth promotion of peanut ( Arachis hypogaea L.) and maize ( Zea mays L.) plants by single and mixed cultures of efficient phosphate solubilizing bacteria that are tolerant to abiotic stress and pesticides

Anzuay

Ciancio

Ludueña

et al. 2017

Microbiological Research

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Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co‐metabolic processes

et al. 2019

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liquid media containing Ca 3 PO 4 ; AlPO 4 or FePO 4 as the sole phosphate source, and discusses the possible mechanisms involved in this process. P solubilization by different strains was accompanied by a significant drop in pH from 7.0 to 2.15-5.0 after 14 days. The efficiency of different strains depended on the P-source. Streptomyces spp. MM140 and MM141 were the most efficient in solubilizing Ca 3 PO 4 , MM136, and MM141 were the most efficient in solubilizing AlPO 4 , while all strains were equally efficient in solubilizing FePO 4 . Gluconic, oxalic, citric, malic, succinic, formic, and acetic acid were detected in the medium with Ca 3 PO 4 , while all except acetic acid were detected in the media with FePO 4 or AlPO 4 . Although we did not use an organic source of phosphorus in the media, all strains produced acid and alkaline phosphatase. It is concluded from this study that actinobacteria produced multiple organic acids followed by a decrease in the pH to solubilize phosphate salts.As well as producing phosphatase, these microorganisms were found to have different ways of making P available, suggesting an ecological advantage as they form part of soil microbiomes important for plants. K E Y W O R D Sactinobacteria, phosphate solubilization, organic acids, Streptomyces

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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

Bashan¹,

Kamnev

de‐Bashan³

2012

Biol Fertil Soils

268

173

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Literature analysis and chemical considerations of biological phosphate solubilization have shown that the commonly used selection factor for this trait, tricalcium phosphate (TCP), is relatively weak and unreliable as a universal selection factor for isolating and testing phosphate-solubilizing bacteria (PSB) for enhancing plant growth. Most publications describing isolation of PSB employed TCP. The use of TCP usually yields many (up to several thousands per study) isolates "supposedly" PSB.When these isolates are further tested for direct contribution of phosphorus to the plants, only a very few are true PSB.Other compounds are also tested, but on a very small scale. These phosphates (P), mainly Fe-P, Al-P, and several Ca-P, are even less soluble than TCP in water. Because soils greatly vary by pH and several chemical considerations, it appears that there is no metal-P compound that can serve as the universal selection factor for PSB. A practical approach is to use a combination of two or three metal-P compounds together or in tandem, according to the end use of these bacteria-Ca-P compounds (including rock phosphates) for alkaline soils, Fe-P and Al-P compounds for acidic soils, and phytates for soils rich in organic P. Isolates with abundant production of acids will be isolated. This approach will reduce the number of potential PSB from numerous isolates to just a few. Once a potential isolate is identified, it must be further tested for direct contribution to P plant nutrition and not necessarily to general growth promotion, as commonly done because promotion of growth, even by PSB, can be the outcome of other mechanisms. Isolates that do not comply with this general sequence of testing should not be declared as PSB.

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Study on the scarcity of red tide in the eutrophicated waters of Ariake Bay. III. Conversion of AlPO4-P to Fe-bound P in sea sediments.

Cited by 12 publications

References 0 publications

Growth promotion of peanut ( Arachis hypogaea L.) and maize ( Zea mays L.) plants by single and mixed cultures of efficient phosphate solubilizing bacteria that are tolerant to abiotic stress and pesticides

Growth promotion of peanut ( Arachis hypogaea L.) and maize ( Zea mays L.) plants by single and mixed cultures of efficient phosphate solubilizing bacteria that are tolerant to abiotic stress and pesticides

Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co‐metabolic processes

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

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