“…Ferulic acid can mediate cross-linkages between hemicelluloses and lignins or between hemicellulosic chains via diferulic bridges ( Ralph et al, 1998 ; Hatfield et al, 2017 ; Terrett and Dupree, 2019 ). The amount of lignins in the cell wall, their variable structure, and the cross-linkages between cell wall components have been suggested to have a variable depressive effect on cell wall polysaccharide degradation by enzymes or microorganisms ( Méchin et al, 2000 ; Fontaine et al, 2003 ; Jung and Phillips, 2010 ; Barriere, 2017 ; Casler and Jung, 2017 ; Hatfield et al, 2017 ; Terrett and Dupree, 2019 ). This effect is related to the limited access of enzymes or microbes to degradable/fermentable polysaccharides ( Meng and Ragauskas, 2014 ; Melati et al, 2019 ).…”