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

Authorsvan Kuijk, Sandra J. A.; Río Andrade, José Carlos del ; Rencoret, Jorge ; Gutiérrez Suárez, Ana ; Sonnenberg, Anton S. M.; Baars, Johan J. P.; Hendriks, Wouter H.; Cone, John W.
KeywordsFungal treatment
In vitro rumen degradability
Lignocellulosic biomass
Issue Date22-Sep-2016
PublisherBioMed Central
CitationJournal of Animal Science and Biotechnology 7:55, 14 pág. (2016)
AbstractBackground 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.
Description14 páginas.-- 6 figuras.-- 3 tablas.-- 31 referencias.-- The dataset supporting the conclusions of this article (are) available upon request at the secretariat of the Animal Nutrition Group of Wageningen University or via the authors of this manuscript.
Publisher version (URL)https://dx.doi.org/10.1002/10.1186/s40104-016-0110-z
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