Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

Elnahas, Marwa O.; Hou, Liyuan; Wall, Judy D.; Majumder, Erica L.-W.

doi:10.3390/polysaccharides2010004

Cited by 13 publications

(5 citation statements)

References 102 publications

(150 reference statements)

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“…Other studies reported an E 24 % of 62.4% for toluene emulsification using the bacterial strain Streptomyces sp. MOE6 [47], and reported values ranging between 33.3 ± 0.0 and 75.0 ± 1.7 for various strains belonging to Marinobacter genus [48].…”

Section: Stability Of the Emulsifying Properties Of The Biosurfactantmentioning

confidence: 98%

Yarrowia lipolytica CMGB32 Biosurfactants Produced Using n-Hexadecane: Developing Strategies for Environmental Remediation

Csutak,

Nicula,

Lungulescu

et al. 2024

Applied Sciences

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The yeast Yarrowia lipolytica degrades petroleum compounds, including alkanes, via the monoterminal oxidation pathway, the hydrophobic carbon substrate assimilation is mediated by biosurfactants, and extracellular amphiphilic molecules are produced by the yeast cell. This study focuses on the ability of the strain Y. lipolytica CMGB32 to degrade n-hexadecane by producing biosurfactants with high potential for bioremediation. The hydrocarbon-degrading potential of the yeast strain was observed via a 2,6-dichlorophenolindophenol (DCPIP) test in Bushnell–Hass medium with 1% n-hexadecane, and cell hydrophobicity was expressed as microbial adhesion to hydrocarbons (MATH). Biosurfactant production on yeast peptone (YP) with 1% n-hexadecane was estimated after 72 h using the emulsification index (E24%) against toluene. Crude biosurfactant (cell-free broth) stability tests were performed at different temperatures (4 °C, 70 °C) and NaCl concentrations (2–10%). The effects of a biosurfactant on synthetic wastewater remediation comprised the growth curves (OD measurements) of natural heavy metal degrader Rhodotorula mucilaginosa, determination of nutrients (spectrophotometrically), physico-chemical parameters, and removal capacity of lead and cadmium ions (via inductively coupled plasma mass spectrometry—ICP-MS). The antimicrobial and anti-adherence activities of 20 mg/mL and 40 mg/mL of the biosurfactant against pathogenic Candida krusei strains involved growth observations and the crystal violet microtiter method. The DCPIP decolorization occurred after six days, corresponding to the maximum growth phase of the Y. lipolytica culture. After 72 h, the cells presented high hydrophobicity (82.61% MATH) and stable biosurfactant production (E24% 47%). The crude biosurfactant (5%) increased the growth of R. mucilaginosa strains cultivated on synthetic wastewater cultures contaminated with Pb2+ and Cd2+, increased the conductivity and COD (86%) of the samples, and determined Pb2+ (66%) and Cd2+ (42%) ions reduction. The concentrated biosurfactant inhibited C. krusei growth (70%) and biofilm adherence. In conclusion, Y. lipolytica CMGB32 shows important potential for development of biosurfactant-based technologies for the remediation of heavy-metal- and emerging pathogen-contaminated wastewaters.

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Section: Stability Of the Emulsifying Properties Of The Biosurfactantmentioning

confidence: 98%

Yarrowia lipolytica CMGB32 Biosurfactants Produced Using n-Hexadecane: Developing Strategies for Environmental Remediation

Csutak,

Nicula,

Lungulescu

et al. 2024

Applied Sciences

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“…MOE6 was evaluated against complex pollutants such as heavy metals and oil spills. MOE6 strain’s siderophore compound “hydroxamate” and secondary metabolites “extracellular polysaccharides” reduced hazardous pollutants in metal removal assays and emulsification activity tests [ 104 ].…”

Section: Streptomycesmentioning

confidence: 99%

“… P. monodon [ 76 ] Streptomyces fradiae Penaeus monodon [ 78 ] Streptomyces coelicoflavus (A6) Streptomyces diastaticus (A44) Streptomyces parvus (A56) Streptomyces champavatii (R32) Penaeus monodon [ 103 ] Streptomyces sp. MOE6 In vitro experiment [ 104 ] In vivo protection during challenge experiment Streptomyces sp. SH5 In vitro experiment [ 105 ] Streptomyces CLS-28 Streptomyces CLS-39 Streptomyces CLS-45 Artemia [ 77 ] P. monodon (post-larvae) Streptomyces sp.…”

Section: Streptomycesmentioning

confidence: 99%

Present Status, Limitations, and Prospects of Using Streptomyces Bacteria as a Potential Probiotic Agent in Aquaculture

Butt

Khan

Liu

et al. 2023

Probiotics & Antimicro. Prot.

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Streptomyces is a Gram-positive bacterium, belonging to the family Streptomycetaceae and order Streptomycetales. Several strains from different species of Streptomyces can be used to promote the health and growth of artificially cultured fish and shellfish by producing secondary metabolites including antibiotics, anticancer agents, antiparasitic agents, antifungal agents, and enzymes (protease and amylase). Some Streptomyces strains also exhibit antagonistic and antimicrobial activity against aquaculture-based pathogens by producing inhibitory compounds such as bacteriocins, siderophores, hydrogen peroxide, and organic acids to compete for nutrients and attachment sites in the host. The administration of Streptomyces in aquaculture could also induce an immune response, disease resistance, quorum sensing/antibiofilm activity, antiviral activity, competitive exclusion, modification in gastrointestinal microflora, growth enhancement, and water quality amelioration via nitrogen fixation and degradation of organic residues from the culture system. This review provides the current status and prospects of Streptomyces as potential probiotics in aquaculture, their selection criteria, administrative methods, and mechanisms of action. The limitations of Streptomyces as probiotics in aquaculture are highlighted and the solutions to these limitations are also discussed.

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“…A group of rhizospheric bacteria is denominated as plant growth–promoting rhizobacteria because they affect plant growth and yield of commercially main crops. PGPRs contain different genera like Arthrobacter , Azotobacter , Azospirillum , Burkholderia , Bacillus , Klebsiella , Enterobacter , Pseudomonas , Xanthomonas , Serratia , and Streptomyces [ 25 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Heavy Metals by Rhizobacteria

Riseh

Vazvani

Hajabdollahi

et al. 2022

Appl Biochem Biotechnol

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Heavy elements accumulate rapidly in the soil due to industrial activities and the industrial revolution, which significantly impact the morphology, physiology, and yield of crops. Heavy metal contamination will eventually affect the plant tolerance threshold and cause changes in the plant genome and genetic structure. Changes in the plant genome lead to changes in encoded proteins and protein sequences. Consuming these mutated products can seriously affect human and animal health. Bioremediation is a process that can be applied to reduce the adverse effects of heavy metals in the soil. In this regard, bioremediation using plant growth–promoting rhizobacteria (PGPRs) as beneficial living agents can help to neutralize the negative interaction between the plant and the heavy metals. PGPRs suppress the adverse effects of heavy metals and the negative interaction of plant-heavy elements by different mechanisms such as biological adsorption and entrapment of heavy elements in extracellular capsules, reduction of metal ion concentration, and formation of complexes with metal ions inside the cell.

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Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

Cited by 13 publications

References 102 publications

Yarrowia lipolytica CMGB32 Biosurfactants Produced Using n-Hexadecane: Developing Strategies for Environmental Remediation

Yarrowia lipolytica CMGB32 Biosurfactants Produced Using n-Hexadecane: Developing Strategies for Environmental Remediation

Present Status, Limitations, and Prospects of Using Streptomyces Bacteria as a Potential Probiotic Agent in Aquaculture

Bioremediation of Heavy Metals by Rhizobacteria

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