Selective ligninolysis of wheat straw and wood chips by the white-rot fungus Lentinula edodes and its influence on in vitro rumen degradability

Background： The present work investigated the influence of lignin content and composition in the fungal treatment of lignocellulosic biomass in order to improve rumen degradability. Wheat straw and wood chips,differing in lignin composition, were treated with Lentinula edodes for 0, 2, 4, 8 and 12 w...

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Bibliographic Details
Published in:Journal of animal science and biotechnology 2016-09, Vol.8 (2), p.391-404, Article 55
Main Authors: van Kuijk, Sandra J A, Del Río, José C, Rencoret, Jorge, Gutiérrez, Ana, Sonnenberg, Anton S M, Baars, Johan J P, Hendriks, Wouter H, Cone, John W
Format: Article
Language:English
Subjects:
Acids
Animal Nutrition
Carbohydrates
Cellulose
Diervoeding
Fungi
Generalized linear models
Leerstoelgroep Diervoeding
Lignin
Lignocellulose
PBR Mushroom research
PBR Paddenstoelen
Polymers
Sorghum
Temperature
WIAS
WUR PB Paddenstoelen
体外
小麦秸秆
木屑
木质素含量
瘤胃降解率
白腐真菌
裂解气相色谱-质谱法
香菇
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Summary:Background： The present work investigated the influence of lignin content and composition in the fungal treatment of lignocellulosic biomass in order to improve rumen degradability. Wheat straw and wood chips,differing in lignin composition, were treated with Lentinula edodes for 0, 2, 4, 8 and 12 wk and the changes occurring during fungal degradation were analyzed using pyrolysis-gas chromatography-mass spectrometry and detergent fiber analysis.Results： L. edodes preferentially degraded lignin, with only limited cellulose degradation, in wheat straw and wood chips, leaving a substrate enriched in cellulose. Syringyl（S）-lignin units were preferentially degraded than guaiacyl（G）-lignin units, resulting in a decreased S/G ratio. A decreasing S/G ratio（wheat straw： r =-0.72, wood chips： r =-0.75） and selective lignin degradation（wheat straw： r =-0.69, wood chips： r =-0.88） were correlated with in vitro gas production（IVGP）, a good indicator for rumen degradability.Conclusions： L. edodes treatment increased the IVGP of wheat straw and wood chips. Effects on IVGP were similar for wheat straw and wood chips indicating that lignin content and 3D-structure of cell walls influence in vitro rumen degradability more than lignin composition.
ISSN:1674-9782
2049-1891
2049-1891
DOI:10.1186/s40104-016-0110-z