Biogeochemical processes in the continental slope of Bay of Bengal: I. Bacterial solubilization of inorganic phosphate

Das, Surajit; Lyla, P. S.; Khan, S. Ajmal

doi:10.15517/rbt.v55i1.6052

Cited by 17 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the deep‐sea sediments are organic carbon (C org ) poor since most of the organic matter degradation takes place within the water column. Under severe C org depletion and oxic condition, phosphate solubilizing bacteria stimulate liberation of P by dissolving insoluble inorganic forms into soluble P and making it biologically reavailable (Biche et al, ; Chen et al, ; S. Das et al, ).…”

Section: Introductionmentioning

confidence: 99%

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

et al. 2018

View full text Add to dashboard Cite

A regional solid‐phase phosphorus (P) speciation study in the Central Indian Basin (CIB) was carried out to elucidate the spatial distribution of sedimentary P species and P diagenesis in an oligotrophic setting. The results show that P enrichment is in the order of biogenic (Pbio) > authigenic (Pauth) > iron bound (PFe) > detrital (Pdet) > organic (Porg) P. The higher concentrations of Pbio are found in siliceous oozes, which are attributed to high biological productivity in the overlying waters compared to pelagic clay region. High Pauth and Pdet contents with low molar Corg/Preact ratios in the pelagic/red clays indicate the deposition of calcium fluorapatite and refractory material from the atmospheric input. The oxygenated bottom water promotes adsorption of P onto iron oxyhydroxides making the PFe an important sink. Remobilization of P within the sediments is limited because of well‐oxygenated conditions and an efficient adsorption by iron oxyhydroxides and clay‐sized sediments. A twofold increase in Ptotal and P‐species is observed in hydrothermally altered, ferruginous sediments from a seamount flank suggesting an important role of hydrothermal processes in P cycling. The calculated P accumulation rate in the present study ranges between 0.6 and 11.7 μmol·cm−2·kyr−1. The burial flux of P for the entire CIB (5.7 × 106 km2) is 0.01 × 1010 mol P per year which accounts for 0.05% of the global flux. The benthic P fluxes from the seawater to the sediments in the area range between 0.0093 and 0.133 μmol·cm−2·kyr−1 indicating that the CIB sediments are an important sink for P.

show abstract

Section: Introductionmentioning

confidence: 99%

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Microbes play an important role in biogeochemical cycle and helping plants to grow and develop and ultimately enhancing the productivity [1,2]. Mineral solubilisation is an important phenomenon in this regard which several bacteria and fungi impart due to their secondary metabolism especially organic acid production [3,4].…”

Section: Introductionmentioning

confidence: 99%

Incidence of Phosphate Solubilising Fungal Population in Soils of Barbara Forest of Odisha, India

Sahoo¹,

Gupta²

2016

APAR

View full text Add to dashboard Cite

The present study deals with the isolation of soil fungi from Barbara forest of Odisha and screening for their phosphate solubilising potential under submerged culture in presence of TCP and rock phosphate. The soil samples collected from 20 different sites showed pH ranged from 4.8 -7.6. Analysis of soluble P content was ranged from 26.88-277.76 kg/ha. Evaluation of fungal population in soils of different sites exhibited the highest fungal count in site one (2.92±2.23cfu/g) followed by site 10 (2.7±0cfu/g). The maximum PSF was found in Site 2(0.625±0.25cfu/g) and 10(0.76±0.7cfu/g) soils. Among all fungal population of all sites of soils studied, six fungi were found as phosphate solubilisers having 1.28-1.5colonization index. Penicillium sp. showed higher TCP solubilisation potential (36.7±2.31%) whereas Aspergillus sp. had the capacity to solubilise Rock phosphate besides TCP also. Outcome of present study clearly indicate the presence of fungi with a good potential of mineral solubilisation in these soils. Further, experimental evidence is required to explore the possibility of these fungi for field application.

show abstract

“…Mineralization of soil organic matter, diffusion of microbial cellular polyphosphate, redox-mediated reduction of Fe(III) oxide and P release from Fe-P complex in reduced environments and by iron-respiring microbes are major P release mechanisms in wetland soil (Boström et al, 1988;Søndergaard et al, 1999;Tong et al, 2005;Weber et al, 2006). Among the mineral-bound P forms, Fe-P is particularly prone to release and an important labile pool of P in lake and other aquatic ecosystems (Boström et al, 1988;Das et al, 2007;Song et al, 2009). Mobilization of calcium-bound P also plays a significant role in P cycling (Das et al, 2007;Song et al, 2009).…”

mentioning

confidence: 99%

“…Among the mineral-bound P forms, Fe-P is particularly prone to release and an important labile pool of P in lake and other aquatic ecosystems (Boström et al, 1988;Das et al, 2007;Song et al, 2009). Mobilization of calcium-bound P also plays a significant role in P cycling (Das et al, 2007;Song et al, 2009). A natural release of ~50% of Ca-P pool was estimated in a lake in China with major role of inorganic P solubilizing bacteria (Song et al, 2009).…”

mentioning

confidence: 99%

“…A natural release of ~50% of Ca-P pool was estimated in a lake in China with major role of inorganic P solubilizing bacteria (Song et al, 2009). Phosphate solubilizing bacteria (PSB) play an important role in biogeochemical phosphorus cycling in both terrestrial and aquatic environments (Gyaneshwar et al, 2002;Das et al, 2007). PSB mobilize the soil bound inorganic P (Chang and Yang, 2009), mainly Ca-P, by solubilizing them to HPO 4 2-and H 2 PO 4 -through acidification, chelation, and proton exchange reactions (Nautiyal, 1999;Lin et al, 2006).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Isolation, Identification and Efficacy of Inorganic Phosphate-Solubilizing Bacteria from Oxbow Lakes of West Bengal, India

Maitra

Bandopadhyay

Samanta

et al. 2014

Geomicrobiology Journal

View full text Add to dashboard Cite

Microbial mobilization of sediment calcium-bound P constitutes an important process of P cycling in aquatic environments. The present study was conducted to identify the bacterial community responsible for inorganic phosphate solubilization in tropical oxbow lakes. Fifty eight phosphate solubilizing bacteria were isolated from bottom soil, water, and fish gut and examined for solubilization of tricalcium phosphate. Results revealed aquatic PSB to be low to moderately capable in P solubilization (mean: 33.5 mg P l -1 ; range: 6.3-68.8 mg P l -1 ), and bacteria from wetland sediment and water were more effective than those from fish gut. The PSB were identified to belong to diverse genera, viz. Bacillus, Brevibacillus, Enterobacter, Agrobacterium, Pseudomonas, Acinetobacter, Microbacterium, Curtobacterium, Stenotrophomonas and Novosphingobium. The findings would help in understanding the microbial role in inorganic P solubilization and identifying important P solubilizers in freshwater environments.

show abstract

Biogeochemical processes in the continental slope of Bay of Bengal: I. Bacterial solubilization of inorganic phosphate

Cited by 17 publications

References 11 publications

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

Incidence of Phosphate Solubilising Fungal Population in Soils of Barbara Forest of Odisha, India

Isolation, Identification and Efficacy of Inorganic Phosphate-Solubilizing Bacteria from Oxbow Lakes of West Bengal, India

Contact Info

Product

Resources

About