title: Degradation of oxo-biodegradable plastic by Pleurotus ostreatus.
abstract: Growing concerns regarding the impact of the accumulation of plastic waste over several decades on the environmental have led to the development of biodegradable plastic. These plastics can be degraded by microorganisms and absorbed by the environment and are therefore gaining public support as a possible alternative to petroleum-derived plastics. Among the developed biodegradable plastics, oxo-biodegradable polymers have been used to produce plastic bags. Exposure of this waste plastic to ultraviolet light (UV) or heat can lead to breakage of the polymer chains in the plastic, and the resulting compounds are easily degraded by microorganisms. However, few studies have characterized the microbial degradation of oxo-biodegradable plastics. In this study, we tested the capability of Pleurotus ostreatus to degrade oxo-biodegradable (D2W) plastic without prior physical treatment, such as exposure to UV or thermal heating. After 45 d of incubation in substrate-containing plastic bags, the oxo-biodegradable plastic, which is commonly used in supermarkets, developed cracks and small holes in the plastic surface as a result of the formation of hydroxyl groups and carbon-oxygen bonds. These alterations may be due to laccase activity. Furthermore, we observed the degradation of the dye found in these bags as well as mushroom formation. Thus, P. ostreatus degrades oxo-biodegradable plastics and produces mushrooms using this plastic as substrate.
authors: Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
authors: José Maria Rodrigues
authors: JM
authors: da Luz
authors: Sirlaine Albino
authors: SA
authors: Paes
authors: Mateus Dias
authors: MD
authors: Nunes
authors: Marliane de Cássia Soares
authors: Mde C
authors: da Silva
authors: Maria Catarina Megumi
authors: MC
authors: Kasuya
mesh_terms: D063566:Biodegradable Plastics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D020076:Pleurotus / Q000378:metabolism*
chemical_list: D063566:Biodegradable Plastics
references: Curr Opin Biotechnol. 2011 Jun;22(3):422-6
references: 21356588
references: Biotechnol Adv. 2008 May-Jun;26(3):246-65
references: 18337047
references: Braz J Microbiol. 2012 Oct;43(4):1508-15
references: 24031982
references: Chemosphere. 2004 Jan;54(3):225-33
references: 14575734
references: Chemosphere. 2005 Mar;59(1):63-8
references: 15698645
references: FEMS Microbiol Ecol. 2003 Jul 1;45(1):49-57
references: 19719606
references: Biotechnol Bioeng Symp. 1976;(6):21-33
references: 1000065
references: Science. 2002 Aug 2;297(5582):803-7
references: 12161646
references: Bioresour Technol. 2003 Jan;86(1):1-5
references: 12421000
references: Anal Biochem. 1976 May 7;72:248-54
references: 942051
references: Appl Environ Microbiol. 2007 Dec;73(24):7947-58
references: 17965212
references: J Environ Sci (China). 2009;21(1):76-82
references: 19402403
references: J Microbiol Methods. 2002 Aug;50(3):227-36
references: 12031573
references: J Microbiol Methods. 2004 Nov;59(2):253-62
references: 15369861