Application of phosphate-solubilizing bacteria for enhancing bioavailability and phytoextraction of cadmium (Cd) from polluted soil

Jeong, Seulki; Moon, Hee Sun; Nam, Kyoungphile; Kim, Jae Young; Kim, Tae Sung

doi:10.1016/j.chemosphere.2012.03.013

Cited by 71 publications

(27 citation statements)

References 29 publications

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“…This study showed that the P-solubilizing bacteria facilitate Pb immobilization via the release of P from insoluble P compounds, thus making Pb (as a carbonatedfluoropyromorphite-like mineral) unavailable for plant uptake. However, Jeong et al (2012) found that the inoculation of plants with P-solubilizing Bacillus megaterium increased the Cd concentration in B. juncea and Abutilon theophrasti by two folds compared with respective non-inoculated control. Taken together, present and previous research indicating that besides the bacterial metal solubilization activity, the other factors including soil nutrients level, pH, type of metals, plants, etc., greatly influence the metal solubilization in soils and thereby alter its uptake by plants (Martínez-Alcalá et al, 2009;Rajkumar et al, 2013).…”

Section: Influence Of P Myrsinacearum Rc6b On Plant Growth and Metalmentioning

confidence: 98%

Phytoextraction of heavy metal polluted soils using Sedum plumbizincicola inoculated with metal mobilizing Phyllobacterium myrsinacearum RC6b

et al. 2013

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h i g h l i g h t sIsolated Phyllobacterium myrsinacearum RC6b effectively mobilized metals in soils. RC6b inoculation enhanced growth and Cd and Zn uptake of Sedum plumbizincicola. Possible mechanisms are plant beneficial activities and soil metal mobilization. RC6b is a good candidate for microbially assisted phytoremediation. a r t i c l e i n f o t r a c tThe aim of this study was to investigate the effects of metal mobilizing plant-growth beneficial bacterium Phyllobacterium myrsinacearum RC6b on plant growth and Cd, Zn and Pb uptake by Sedum plumbizincicola under laboratory conditions. Among a collection of metal-resistant bacteria, P. myrsinacearum RC6b was specifically chosen as a most favorable metal mobilizer based on its capability of mobilizing high concentrations of Cd, Zn and Pb in soils. P. myrsinacearum RC6b exhibited a high degree of resistance to Cd (350 mg L À1 ), Zn (1000 mg L À1 ) and Pb (1200 mg L À1 ). Furthermore, P. myrsinacearum RC6b showed multiple plant growth beneficial features including the production of 1-aminocyclopropane-1-carboxylic acid deaminase, indole-3-acetic acid, siderophore and solubilization of insoluble phosphate. Inoculation of P. myrsinacearum RC6b significantly increased S. plumbizincicola growth and organ metal concentrations except Pb, which concentration was lower in root and stem of inoculated plants. The results suggest that the metal mobilizing P. myrsinacearum RC6b could be used as an effective inoculant for the improvement of phytoremediation in multi-metal polluted soils.

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Section: Influence Of P Myrsinacearum Rc6b On Plant Growth and Metalmentioning

confidence: 98%

Phytoextraction of heavy metal polluted soils using Sedum plumbizincicola inoculated with metal mobilizing Phyllobacterium myrsinacearum RC6b

et al. 2013

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“…Some of them have the ability to dissolve inorganic phosphate and hence have potential use as biofertilizers in agriculture. Phosphate solubilizing bacteria have different mechanisms of action and also wide diversity and can be used in management of sustainable agricultural systems (Zaidi et al 2009) Application of phosphate solubilizing bacteria in promoting soil fertility (Shokri et al 2012), enhancing biological nitrogen fixation (Mahantesh et al 2011) and biological remediation of lead (Park et al 2010) and cadmium (Jeong et al 2012) polluted soil has been shown.…”

Section: Discussionmentioning

confidence: 99%

Screening cabbage rhizosphere as a habitat for isolation of phosphate-solubilizing bacteria

Motamedi¹,

Aalivand²,

Varzi³

et al. 2016

EEB

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Phosphorus plays a major role in plant growth, but due to insoluble complex formation in soil, it is mainly unavailable for plants. Phosphate solubilizing bacteria dissolve phosphate and hence are regarded as biofertilizer. These bacteria are present in different habitats and screening of such habitats can introduce potent phosphate solubilizing bacteria as biologic fertilizer. The aim was finding such isolates from cabbage rhizosphere. Soil samples were enriched and screened using Pikovskaya's agar. Isolates were identified by phenotypic and genotypic methods. Their biological activities were also investigated. Four of these isolates had highest phosphate solubilization index (1.3 to 4.7) and phosphate solubilization efficiency (33.3 to 366.6). Inorganic phosphate solubilizing ability of these strains was 6.74 to 89.1 mg L -1 . The predominant organic acid found was oxalic acid for RK33 isolate. All phosphate solubilizing strains were able to fix nitrogen, while only RK24 and RK33 produced phytase. These isolates were Aeromonas sp., Proteus sp., Proteus mirabilis and Raoultella terrigena. Finally, it can be concluded that cabbage rhizosphere is a potent habitat for finding phosphate solublizing bacteria, which can be applied as biofertilizer, thus avoiding undesirable side effects of chemical fertilizers.

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“…In a soil improvement process, phosphate solubilizing bacteria (PSB) have been widely used because they affect the release of phosphorous (P) from inorganic and organic P pools through solubilization and mineralization [13][14][15] by organic acid production. In the present study, we investigated the feasibility to use PSB in REE leaching from monazite-bearing ore as an exploratory study.…”

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Use of Phosphate Solubilizing Bacteria to Leach Rare Earth Elements from Monazite-Bearing Ore

Shin

Kim

et al. 2015

Minerals

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Abstract:In the present study, the feasibility to use phosphate solubilizing bacteria (PSB) to develop a biological leaching process of rare earth elements (REE) from monazite-bearing ore was determined. To predict the REE leaching capacity of bacteria, the phosphate solubilizing abilities of 10 species of PSB were determined by halo zone formation on Reyes minimal agar media supplemented with bromo cresol green together with a phosphate solubilization test in Reyes minimal liquid media as the screening studies. Calcium phosphate was used as a model mineral phosphate. Among the test PSB strains, Pseudomonas fluorescens, P. putida, P. rhizosphaerae, Mesorhizobium ciceri, Bacillus megaterium, and Acetobacter aceti formed halo zones, with the zone of A. aceti being the widest. In the phosphate solubilization test in liquid media, Azospirillum lipoferum, P. rhizosphaerae, B. megaterium, and A. aceti caused the leaching of 6.4%, 6.9%, 7.5%, and 32.5% of calcium, respectively. When PSB were used to leach REE from monazite-bearing ore, ~5.7 mg/L of cerium (0.13% of leaching efficiency) and ~2.8 mg/L of lanthanum (0.11%) were leached by A. aceti, and Azospirillum brasilense, A. lipoferum, P. rhizosphaerae and M. ciceri leached 0.5-1 mg/L of both cerium and lanthanum (0.005%-0.01%), as measured by concentrations in the leaching liquor. These results indicate that determination of halo zone formation was found as a useful method to select high-capacity bacteria in REE leaching. However, as the leaching efficiency determined in our experiments was low, even in the presence of A. aceti, further studies are now underway to enhance leaching efficiency by selecting other microorganisms based on halo zone formation.

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Application of phosphate-solubilizing bacteria for enhancing bioavailability and phytoextraction of cadmium (Cd) from polluted soil

Cited by 71 publications

References 29 publications

Phytoextraction of heavy metal polluted soils using Sedum plumbizincicola inoculated with metal mobilizing Phyllobacterium myrsinacearum RC6b

Phytoextraction of heavy metal polluted soils using Sedum plumbizincicola inoculated with metal mobilizing Phyllobacterium myrsinacearum RC6b

Screening cabbage rhizosphere as a habitat for isolation of phosphate-solubilizing bacteria

Use of Phosphate Solubilizing Bacteria to Leach Rare Earth Elements from Monazite-Bearing Ore

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