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

Sandra J.A.van Kuijk; José C.del Río; Jorge Rencoret; Ana Gutiérrez; Anton S.M.Sonnenberg; Johan J.P.Baars; Wouter H.Hendriks; John W.Cone

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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

机译：白腐真菌香菇对小麦秸秆和木片的选择性木质素分解及其对体外瘤胃降解性的影响

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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)-Iignin units were preferentially degraded than guaiacyl (G)-Iignin 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.

机译：背景：本研究调查了木质素含量和组成对木质纤维素生物质真菌处理的影响，以提高瘤胃的可降解性。小麦秸秆和木片，木质素组成不同，用香菇处理0,2,4，采用热解-气相色谱-质谱联用和去污剂纤维分析法分析了8周和12周的真菌降解过程中发生的变化。结果：麦草和木片中的香菇优先降解木质素，而纤维素的降解却有限。富含纤维素的底物。丁香基（S）-木质素单元比愈创木脂基（G）-木质素单元优先降解，导致S / G比降低.S / G比降低（麦秆：r = -0.72，木片）：r = -0.75）和选择性木质素降解（小麦秸秆：r = -0.69，木片：r = -0.88）与体外产气量（IVGP）相关，这是瘤胃可降解性的良好指标。治疗增加t小麦秸秆和木片的IVGP效果相似。表明小麦秸秆和木片的IVGP相似，表明木质素含量和细胞壁的3D结构对体外瘤胃降解性的影响大于木质素组成。

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《畜牧与生物技术杂志(英文版)》 |2017年第2期|391-404|共14页
作者
Sandra J.A.van Kuijk; José C.del Río; Jorge Rencoret; Ana Gutiérrez; Anton S.M.Sonnenberg; Johan J.P.Baars; Wouter H.Hendriks; John W.Cone;
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Animal Nutrition Group, Wageningen University, De Elst 1, 6708 WD Wageningen, The Netherlands;

Instituto de Recursos Naturales y Agrobiologica de Sevilla(IRNAS-CSIC), Avenida Reina Mercedes, 10, 42012 Seville, Spain;

Instituto de Recursos Naturales y Agrobiologica de Sevilla(IRNAS-CSIC), Avenida Reina Mercedes, 10, 42012 Seville, Spain;

Instituto de Recursos Naturales y Agrobiologica de Sevilla(IRNAS-CSIC), Avenida Reina Mercedes, 10, 42012 Seville, Spain;

Plant Breeding, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;

Plant Breeding, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;

Animal Nutrition Group, Wageningen University, De Elst 1, 6708 WD Wageningen, The Netherlands;

Animal Nutrition Group, Wageningen University, De Elst 1, 6708 WD Wageningen, The Netherlands;

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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

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