Enhancement of atrazine biodegradation by marine isolate Bacillus velezensis MHNK1 in presence of surfactin lipopeptide

Jakinala, Parameshwar; Lingampally, Nageshwar; Archana, Kyama; Hameeda, Bee

doi:10.1016/j.ecoenv.2019.109372

Cited by 45 publications

(16 citation statements)

References 46 publications

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“…All the experiments were performed in triplicates, repeated twice and data was expressed as means ± standard deviation using IBM Corporation. 2012 Statistics, and graphs were drawn using Origin Pro 2015 [17,18].…”

Section: Discussionmentioning

confidence: 99%

Silver nanoparticles from insect wing extract: Biosynthesis and evaluation for antioxidant and antimicrobial potential

et al. 2021

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Silver nanoparticles (AgNPs) are among the most widely synthesized and used nanoparticles (NPs). AgNPs have been traditionally synthesized from plant extracts, cobwebs, microorganisms, etc. However, their synthesis from wing extracts of common insect; Mang mao which is abundantly available in most of the Asian countries has not been explored yet. We report the synthesis of AgNPs from M. mao wings extract and its antioxidant and antimicrobial activity. The synthesized AgNPs were spherical, 40–60 nm in size and revealed strong absorption plasmon band around at 430 nm. Highly crystalline nature of these particles as determined by Energy-dispersive X-ray analysis and X-ray diffraction further confirmed the presence of AgNPs. Hydrodynamic size and zeta potential of AgNPs were observed to be 43.9 nm and -7.12 mV, respectively. Fourier-transform infrared spectroscopy analysis revealed the presence of characteristic amide proteins and aromatic functional groups. Thin-layer chromatography (TLC) and Gas chromatography-mass spectroscopy (GC-MS) analysis revealed the presence of fatty acids in the wings extract that may be responsible for biosynthesis and stabilization of AgNPs. Further, SDS-PAGE of the insect wing extract protein showed the molecular weight of 49 kDa. M. mao silver nanoparticles (MMAgNPs) exhibit strong antioxidant, broad-range antibacterial and antifungal activities, (66.8 to 87.0%), broad-range antibacterial and antifungal activities was found with maximum zone of inhibition against Staphylococcus aureus MTCC 96 (35±0.4 mm) and Fusarium oxysporum f. sp. ricini (86.6±0.4) which signifies their biomedical and agricultural potential.

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Section: Discussionmentioning

confidence: 99%

Silver nanoparticles from insect wing extract: Biosynthesis and evaluation for antioxidant and antimicrobial potential

et al. 2021

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“…The surfactin lipopeptide was produced by marine Bacillus velezensis MHNK1 under atrazine biodegradation. The complete degradation of atrazine was observed within 4 days after employing a combination of B. velezensis MHNK1 (2 %) and surfactin (2 CMC) [164].…”

Section: Production Of Glycolipidmentioning

confidence: 99%

Microbial glycoconjugates in organic pollutant bioremediation: recent advances and applications

et al. 2021

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The large-scale application of organic pollutants (OPs) has contaminated the air, soil, and water. Persistent OPs enter the food supply chain and create several hazardous effects on living systems. Thus, there is a need to manage the environmental levels of these toxicants. Microbial glycoconjugates pave the way for the enhanced degradation of these toxic pollutants from the environment. Microbial glycoconjugates increase the bioavailability of these OPs by reducing surface tension and creating a solvent interface. To date, very little emphasis has been given to the scope of glycoconjugates in the biodegradation of OPs. Glycoconjugates create a bridge between microbes and OPs, which helps to accelerate degradation through microbial metabolism. This review provides an in-depth overview of glycoconjugates, their role in biofilm formation, and their applications in the bioremediation of OP-contaminated environments.

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“…The highest SmF yield at the lab scale was obtained at a volume of 1.2 L by P. aeruginosa UCP 0992 (26 g L −1 ) to obtain a rhamnolipid using corn steep liquor and vegetable oil residue as fermentation substrates [ 52 ]. The lowest yield at the same production scale was 500 mL (0.83 g L −1 ) for surfactin production using B. velezensis MHNK1 [ 21 ]. At production volumes of 50 L, better sophorolipid yields (21 g L −1 and 27 g L −1 ) were found using Candida species and high-fat content residues [ 5 , 36 ].…”

Section: Production Of Biosurfactantsmentioning

confidence: 99%

“…A novel biosurfactant can be used as a biocide against pathogenic microorganisms, without the use of aggressive chemical methods. Furthermore, pathogenic microorganisms can develop resistance to chemical compounds such as atrazine [ 21 ]. [ 22 ] reported that biosurfactants could be an alternative to this problem because they present a very low critical micelle concentration (CMC), which is the minimum concentration required to reduce the surface tension to the maximum extent, a significant parameter to be considered in bioremediation processes.…”

Section: Introductionmentioning

confidence: 99%

Microbial biosurfactants: a review of recent environmental applications

et al. 2022

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Microbial biosurfactants are low-molecular-weight surface-active compounds of high industrial interest owing to their chemical properties and stability under several environmental conditions. The chemistry of a biosurfactant and its production cost are defined by the selection of the producer microorganism, type of substrate, and purification strategy. Recently, biosurfactants have been applied to solve or contribute to solving some environmental problems, with this being their main field of application. The most referenced studies are based on the bioremediation of contaminated soils with recalcitrant pollutants, such as hydrocarbons or heavy metals. In the case of heavy metals, biosurfactants function as chelating agents owing to their binding capacity. However, the mechanism by which biosurfactants typically act in an environmental field is focused on their ability to reduce the surface tension, thus facilitating the emulsification and solubilization of certain pollutants ( in-situ biostimulation and/or bioaugmentation). Moreover, despite the low toxicity of biosurfactants, they can also act as biocidal agents at certain doses, mainly at higher concentrations than their critical micellar concentration. More recently, biosurfactant production using alternative substrates, such as several types of organic waste and solid-state fermentation, has increased its applicability and research interest in a circular economy context. In this review, the most recent research publications on the use of biosurfactants in environmental applications as an alternative to conventional chemical surfactants are summarized and analyzed. Novel strategies using biosurfactants as agricultural and biocidal agents are also presented in this paper.

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Enhancement of atrazine biodegradation by marine isolate Bacillus velezensis MHNK1 in presence of surfactin lipopeptide

Cited by 45 publications

References 46 publications

Silver nanoparticles from insect wing extract: Biosynthesis and evaluation for antioxidant and antimicrobial potential

Silver nanoparticles from insect wing extract: Biosynthesis and evaluation for antioxidant and antimicrobial potential

Microbial glycoconjugates in organic pollutant bioremediation: recent advances and applications

Microbial biosurfactants: a review of recent environmental applications

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