title: Bioprocess of triphenylmethane dyes decolorization by Pleurotus ostreatus BP under solid-state cultivation.
abstract: With an aim to evaluate dye decolorization by white rot fungus on natural living conditions, reproducing by solidstate fermentation, the process of triphenylmethane dyes decolorization using the white rot fungus P. ostreatus BP, cultivated on rice straw solid-state medium, has been demonstrated. Three typical dyes, including malachite green, bromophenol blue, and crystal violet, were almost completely decolorized by the fungus after 9 days of incubation. During the process of dye decolorization, the activities of enzyme secreted by the fungus, and the contents of soluble components, such as phenolic compounds, protein, and sugar, changed regularly. The fungus could produce ligninolytic, cellulolytic, and hemicellulolytic enzymes and laccase was the most dominant enzyme in solid-state medium. Laccase, laccase isoenzyme, and the laccase mediator could explain the decolorization of malachite green, bromophenol blue, and crystal violet by the fungus in solid medium, respectively. It is worth noting that the presence of the water-soluble phenolic compounds could stimulate the growth of fungus, enhance the production of laccase, and accelerate dye decolorization.
authors.affiliation: College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Keliang
authors.initials: K
authors.lastname: Yan
authors.forename: Hongxun
authors.initials: H
authors.lastname: Wang
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Zhang
authors.forename: Hongbo
authors.initials: H
authors.lastname: Yu
mesh_terms: D001673:Biodegradation, Environmental; D001978:Bromphenol Blue / Q000737:chemistry / Q000378:metabolism*; D005591:Chemical Fractionation / Q000379:methods; D003116:Color; D003470:Culture Media / Q000737:chemistry; D005285:Fermentation; D005840:Gentian Violet / Q000737:chemistry / Q000378:metabolism*; D007218:Industrial Microbiology / Q000379:methods; D007220:Industrial Waste; D042845:Laccase / Q000378:metabolism; D012275:Oryza / Q000737:chemistry / Q000378:metabolism; D020076:Pleurotus / Q000254:growth & development / Q000378:metabolism; D012394:Rosaniline Dyes / Q000737:chemistry / Q000378:metabolism*; D013379:Substrate Specificity; D013997:Time Factors; D014320:Triphenylmethyl Compounds / Q000737:chemistry*
chemical_list: D003470:Culture Media; D007220:Industrial Waste; D012394:Rosaniline Dyes; D014320:Triphenylmethyl Compounds; D001978:Bromphenol Blue; C005095:malachite green; C046945:triphenylmethane; D042845:Laccase; D005840:Gentian Violet