BACKGROUND: The effectiveness of the analysis of cell wall-bound hydroxycinnamic acids and the composition of lignin to evaluate the in vivo digestibility of a silage collection with unknown botanical composition was evaluated. RESULTS: Syringyl units content and total etherified phenols showed the highest correlation coefficients with in vivo dry matter digestibility (IVDMD) (r = - 0.792 and r = - 0.703, respectively), while guaiacyl units and total phenols showed the highest correlation coefficients with in vivo organic matter digestibility (IVOMD) (r = - 0.871 and r = - 0.817, respectively). Using the above-mentioned chemical parameters, 10 equations were also developed to predict in vivo digestibility. The prediction of IVDMD produced a high adjusted R(2) value (0.710) using syringyl, total lignin, etherified total phenols, esterified ferulic acid and total phenol content as predictors. The prediction of IVOMD produced a higher adjusted R(2) value (0.821) using guaiacyl, total phenols, total ferulic acid and etherified p-coumaric acid content as predictors. CONCLUSION: Cell wall digestibility depends on a multiplicity of factors and it is not possible to attribute a causal effect on in vivo digestibility to any single factor. However, syringyl and guaiacyl content and etherified phenols emerge as good predictors of digestibility.
BACKGROUND: The effectiveness of the analysis of cell wall-bound hydroxycinnamic acids and the composition of lignin to evaluate the in vivo digestibility of a silage collection with unknown botanical composition was evaluated. RESULTS: Syringyl units content and total etherified phenols showed the highest correlation coefficients with in vivo dry matter digestibility (IVDMD) (r = - 0.792 and r = - 0.703, respectively), while guaiacyl units and total phenols showed the highest correlation coefficients with in vivo organic matter digestibility (IVOMD) (r = - 0.871 and r = - 0.817, respectively). Using the above-mentioned chemical parameters, 10 equations were also developed to predict in vivo digestibility. The prediction of IVDMD produced a high adjusted R(2) value (0.710) using syringyl, total lignin, etherified total phenols, esterified ferulic acid and total phenol content as predictors. The prediction of IVOMD produced a higher adjusted R(2) value (0.821) using guaiacyl, total phenols, total ferulic acid and etherified p-coumaric acid content as predictors. CONCLUSION: Cell wall digestibility depends on a multiplicity of factors and it is not possible to attribute a causal effect on in vivo digestibility to any single factor. However, syringyl and guaiacyl content and etherified phenols emerge as good predictors of digestibility.
Authors: Viviane Guzzo de Carli Poelking; Andrea Giordano; Maria Esther Ricci-Silva; Thomas Christopher Rhys Williams; Diego Alves Peçanha; Marília Contin Ventrella; Jorge Rencoret; John Ralph; Márcio Henrique Pereira Barbosa; Marcelo Loureiro Journal: PLoS One Date: 2015-08-07 Impact factor: 3.240
Authors: Jia Wu; Samuel R A Collins; Adam Elliston; Nikolaus Wellner; Jo Dicks; Ian N Roberts; Keith W Waldron Journal: Biotechnol Biofuels Date: 2018-06-11 Impact factor: 6.040