Phosphate-Solubilizing Microorganisms

Kuhad, Ramesh Chander; Singh, Surender; Lata,; Singh, Ajay

doi:10.1007/978-3-642-19769-7_4

Cited by 27 publications

(22 citation statements)

References 99 publications

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“…Maintaining a high level of P has been a major challenge to agricultural scientists, ecologists, and farm managers due to complex bonds formation between available phosphorus and soil cations (Ca 2+ , Al 3+ , Fe 2+ , or Mn 2+ ) depending on soil pH and organic matter [35]. Thus, in contemporary agricultural practices, synthetic phosphatic fertilizer is applied to overcome the P deficiency to plants, which indeed is expensive and poses some serious threats to sustaining the environment.…”

Section: Discussionmentioning

confidence: 99%

Soil Properties Related to the Occurrence of Rock Phosphate-Solubilizing Bacteria in the Rhizosphere Soil of Faba Bean (Vicia faba L.) in Morocco

et al. 2018

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This study focused on revealing the correlations between rock phosphate-solubilizing bacteria (PSB) counts and differing properties of the rhizosphere soil. One hundred and thirty-two samples of rhizosphere soil of faba bean (Vicia faba L.) were collected and analyzed from 14 agricultural areas in Meknes, Morocco. The results revealed that all the samples were inhabited with indigenous PSB ranging from 3.55 to 0.002 (×10 5 CFU/g soil). The correlations between PSB counts and cation exchange capacity, available phosphorus (P), and pH were insignificant; on the contrary, a highly significant correlation (p ≤ 0.01) was found between the numbers of PSB and total soil bacteria (TB) (r = 0.80), total nitrogen (N) (r = 0.86), and organic matter (r = 0.90). This research enhances our knowledge on PSB population and their interaction with physical, chemical, and biological properties of the rhizosphere soil of faba bean to provide a new index for better use in organic agricultural practices.

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Section: Discussionmentioning

confidence: 99%

Soil Properties Related to the Occurrence of Rock Phosphate-Solubilizing Bacteria in the Rhizosphere Soil of Faba Bean (Vicia faba L.) in Morocco

et al. 2018

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“…However, essential plant nutrients such as P remain insoluble in soil systems [10]. Phosphorus is present in the soil in both inorganic and organic compounds.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the phosphate concentration in soil solution may continuously change due to phosphate sorption and desorption by both biotic (microorganisms) and abiotic (pH, temperature, etc.) factors [10]. The dominant process determines the net changes in P concentration.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Solubilization by Thermotolerant Bacillus subtilis Isolated from Cow Dung Microflora

2012

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Soil inoculation with phosphate-solubilizing bacteria is known to improve solubilization of fixed soil phosphorus (P). Cow dung (CD) is normally used as an organic manure for enhancing soil fertility in tropical agriculture. Thermotolerant (\50°C) Bacillus subtilis strains isolated from CD solubilized tricalcium phosphate (CP) to available (soluble) phosphate in culture and in autoclaved soil amended with 1 % CP. The solubilization of CP was associated with the phosphatase activity of the bacterium, particularly acid phosphatase (AcP). Autoclaved soil amended with CD (10 %) showed 25.3 and 12.6 % higher solubilization of P and AcP activity, respectively, than autoclaved soil inoculated with B. subtilis. Also, B. subtilis inoculation and CD amendment resulted in higher P solubilization and phosphatase activity in both rhizosphere and nonrhizosphere of soil planted with cowpea (Vigna unguiculata L.) than without these two treatments. Similarly, root length, plant height, and plant biomass of cowpea seedlings were higher in bacterium-or CD-treated soil than in untreated soil. These results suggest that these thermotolerant B. subtilis strains as bio-inoculant or CD amendment can be successfully employed in tropical agriculture for solubilization of P and maintaining soil health, being useful in the context of global warming.

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“…Phosphorus (P) is an essential plant nutrient that plays a vital role in energy transfer reactions, respiration, macromolecular biosynthesis, and photosynthesis (Kuhad et al 2011). Most soils around the world are deficient in P because a large portion of soil P is being ﬁxed as insoluble phosphates of Al, Ca, or Fe, therefore it is not available to plant as a nutrient source (Gyaneshwar et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Isolation and identification of a phosphate solubilising fungus from soil of a phosphate mine in Chaluse, Iran

et al. 2016

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Microbial solubilisation of phosphorus from insoluble phosphates is an environmental friendly and cost effective approach in sustainable soil management. Introducing the indigenous microorganisms to soil requires shorter adaptation period and causes fewer ecological distortions than exogenous microorganisms. This study was conducted to isolate and identify the indigenous fungi for phosphate solubilisation in Mazandaran, Iran. A potent phosphate solubilising fungus was isolated from an Iranian phosphate mine and selected for solubilisation of rock phosphate (RP). The identified fungus was characterised by calmodulin-based polymerase chain reaction method as Aspergillus tubingensis SANRU (Sari Agricultural Sciences and Natural Resources University). The phosphate solubilisation ability of the fungal strain was carried out in shake-flask leaching experiments containing various concentrations of RP (1%, 2%, 4%, or 8% w/v). The maximum P solubilisation rate of 347 mg/l was achieved at 1% of RP concentration on day 9. The regression analysis indicated that the P solubilised mainly through acidification. This study shows the possibility of using A. tubingensis SANRU for application in the management of P fertilisation.

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Phosphate-Solubilizing Microorganisms

Cited by 27 publications

References 99 publications

Soil Properties Related to the Occurrence of Rock Phosphate-Solubilizing Bacteria in the Rhizosphere Soil of Faba Bean (Vicia faba L.) in Morocco

Soil Properties Related to the Occurrence of Rock Phosphate-Solubilizing Bacteria in the Rhizosphere Soil of Faba Bean (Vicia faba L.) in Morocco

Phosphorus Solubilization by Thermotolerant Bacillus subtilis Isolated from Cow Dung Microflora

Isolation and identification of a phosphate solubilising fungus from soil of a phosphate mine in Chaluse, Iran

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