Enzymatic saccharification of biologically pre-treated wheat straw with white-rot fungi

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abstract

Wheat straw was submitted to a pre-treatment by the basidiomycetous fungi Euc-1 and lrpex lacteus, aiming to improve the accessibility of cellulose towards enzymatic hydrolysis via previous selective bio-delignification. This allowed the increase of substrate saccharification nearly four and three times while applying the basidiomycetes Euc-1 and I. lacteus, respectively. The cellulose/lignin ratio increased from 2.7 in the untreated wheat straw to 5.9 and 4.6 after the bio-treatment by the basidiomycetes Euc-1 and I. lacteus, respectively, thus evidencing the highly selective lignin biodegradation. The enzymatic profile of both fungi upon bio-treatment of wheat straw have been assessed including laccase, manganese-dependent peroxidase, lignin peroxidase, carboxymethylcellulase, xylanase, avicelase and feruloyl esterase activities. The difference in efficiency and selectivity of delignification within the two fungi treatments was interpreted in terms of specific lignolytic enzyme profiles and moderate xylanase and cellulolytic activities. (C) 2010 Elsevier Ltd. All rights reserved.

keywords

SOLID-STATE FERMENTATION; FERULOYL ESTERASE; IRPEX-LACTEUS; MANGANESE PEROXIDASE; CHEMICAL-COMPOSITION; LIGNIN; DEGRADATION; LACCASE; BIODEGRADATION; DIGESTIBILITY

subject category

Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels

authors

Dias, AA; Freitas, GS; Marques, GSM; Sampaio, A; Fraga, IS; Rodrigues, MAM; Evtuguin, DV; Bezerra, RMF

our authors

foto Dmitry Evtyugin

Dmitry Evtyugin

Associate Professor with Aggregation

Groups

G4 - Renewable Materials and Circular Economy

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Publication Details

type
Journal Article
year
2010
journal
BIORESOURCE TECHNOLOGY
volume
101
publisher
ELSEVIER SCI LTD
issn
0960-8524
issue
15
digital object identifier
10.1016/j.biortech.2010.02.110
web of science article identifier
WOS:000278035900042

Journal Metrics (JCR 2019)

Journal Impact Factor
7.539
Journal Impact Factor (5 yrs)
7.27
category normalized journal percentile
92.54

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