Natural rubber degradation by laccase and manganese peroxidase enzymes of Penicillium chrysogenum

Nayanashree, G.; Thippeswamy, B

doi:10.1007/s13762-014-0636-6

Cited by 33 publications

(18 citation statements)

References 13 publications

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“…The laccase and manganese peroxidase activity of Penicillium sp. are responsible by degradation of polyethylene [31,36] and natural rubber [37]. These studies confirm the low specificity of these enzymes to the substrate.…”

Section: Scanning Electron Micrograph Of Oxo-biodegradable Plastics Bsupporting

confidence: 70%

Plastics Polymers Degradation by Fungi

Luz¹,

Silva²,

Santos³

et al. 2020

Microorganisms

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The studies on plastic degradation are very important for the development of biodegradable plastics, and for reduction of pollution, since plastic waste can remain in the environment for decades or centuries. We have showed the degradation of oxo-biodegradable plastic bags and green polyethylene by Pleurotus ostreatus. This fungus can also produce mushrooms using these plastics. The plastic degradation was possibly by three reasons: (a) presence of pro-oxidant ions or plant polymer, (b) low specificity of the lignocellulolytic enzymes, and (c) the presence of endomycotic nitrogen-fixing microorganisms. In this chapter, the plastic bags' degradation by abiotic and microbial process using the exposure to sunlight and the use of a white-rot fungus will described. The physical, chemical, and biological alterations of plastic were analyzed after each process of degradation. The degradation of plastic bags was more effective when the abiotic and biotic degradations were combined.

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Section: Scanning Electron Micrograph Of Oxo-biodegradable Plastics Bsupporting

confidence: 70%

Plastics Polymers Degradation by Fungi

Luz¹,

Silva²,

Santos³

et al. 2020

Microorganisms

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“…However, even ascomycetes have been reported to degrade recalcitrant compounds thanks to oxidative enzymes. In particular, Penicillium produced laccases and peroxidases [ 49 ]. In this study, the most effective autochtonous fungus in laccase production was a P. boydii strain.…”

Section: Resultsmentioning

confidence: 99%

Bioremediation of Landfill Leachate with Fungi: Autochthonous vs. Allochthonous Strains

Spina

Tigini

Romagnolo

et al. 2018

Life

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Autochthonous fungi from contaminated wastewater are potential successful agents bioremediation thanks to their adaptation to pollutant toxicity and to competition with other microorganisms present in wastewater treatment plant. Biological treatment by means of selected fungal strains could be a potential tool to integrate the leachate depuration process, thanks to their fungal extracellular enzymes with non-selective catalytical activity. In the present work, the treatability of two real samples (a crude landfill leachate and the effluent coming from a traditional wastewater treatment plant) was investigated in decolorization experiments with fungal biomasses. Five autochthonous fungi, Penicillium brevicompactum MUT 793, Pseudallescheria boydii MUT 721, P. boydii MUT 1269, Phanerochaete sanguinea MUT 1284, and Flammulina velutipes MUT 1275, were selected in a previous miniaturized decolorization screening. Their effectiveness in terms of decolorization, enzymatic activity (laccases and peroxidases), biomass growth and ecotoxicity removal was compared with that of five allochthonous fungal strains, Pleurotus ostreatus MUT 2976, Porostereum spadiceum MUT 1585, Trametes pubescens MUT 2400, Bjerkandera adusta MUT 3060 and B. adusta MUT 2295, selected for their well known capability to degrade recalcitrant pollutants. Moreover, the effect of biomass immobilization on polyurethane foam (PUF) cube was assessed. The best decolorization (60%) was achieved by P. spadiceum MUT 1585, P. boydii MUT 721 and MUT 1269. In the first case, the DP was achieved gradually, suggesting a biodegradation process with the involvement of peroxidases. On the contrary, the two autochthonous fungi seem to bioremediate the effluent mainly by biosorption, with the abatement of the toxicity (up to 100%). The biomass immobilization enhanced enzymatic activity, but not the DP. Moreover, it limited the biomass growth for the fast growing fungi, MUT 721 and MUT 1269. In conclusion, robust and versatile strains coming from well-characterized collections of microorganisms can obtain excellent results comparing and even exceeding the bioremediation yields of strains already adapted to pollutants.

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“… 1 The latex from the Hevea brasiliensis contains a polymer of cis -1,4-poly(isoprene) units and up to 90% of the dry weight of the latex is cis -1,4-poly(isoprene) and less than 10% are non-rubber constituents such as protein and carbohydrates. 2 , 3 …”

Section: Introductionmentioning

confidence: 99%

Rubber gloves biodegradation by a consortium, mixed culture and pure culture isolated from soil samples

Nawong

Umsakul

Sermwittayawong

2018

Brazilian Journal of Microbiology

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An increasing production of natural rubber (NR) products has led to major challenges in waste management. In this study, the degradation of rubber latex gloves in a mineral salt medium (MSM) using a bacterial consortium, a mixed culture of the selected bacteria and a pure culture were studied. The highest 18% weight loss of the rubber gloves were detected after incubated with the mixed culture. The increased viable cell counts over incubation time indicated that cells used rubber gloves as sole carbon source leading to the degradation of the polymer. The growth behavior of NR-degrading bacteria on the latex gloves surface was investigated using the scanning electron microscope (SEM). The occurrence of the aldehyde groups in the degradation products was observed by Fourier Transform Infrared Spectroscopy analysis. Rhodococcus pyridinivorans strain F5 gave the highest weight loss of rubber gloves among the isolated strain and posses latex clearing protein encoded by lcp gene. The mixed culture of the selected strains showed the potential in degrading rubber within 30 days and is considered to be used efficiently for rubber product degradation. This is the first report to demonstrate a strong ability to degrade rubber by Rhodococcus pyridinivorans.

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Natural rubber degradation by laccase and manganese peroxidase enzymes of Penicillium chrysogenum

Cited by 33 publications

References 13 publications

Plastics Polymers Degradation by Fungi

Plastics Polymers Degradation by Fungi

Bioremediation of Landfill Leachate with Fungi: Autochthonous vs. Allochthonous Strains

Rubber gloves biodegradation by a consortium, mixed culture and pure culture isolated from soil samples

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