title: Impact of lignin structure and cell wall reticulation on maize cell wall degradability.
abstract: In this study, eight maize recombinant inbred lines were selected to assess both the impact of lignin structure and the impact of cell wall reticulation by p-hydroxycinnamic acids on cell wall degradability independently of the main "lignin content" factor. These recombinant lines and their parents were analyzed for in vitro degradability, cell wall residue content, esterified and etherified p-hydroxycinnamic acid content, and lignin content and structure. Lignin structure and esterified p-coumaric acid content showed significantly high correlation with in vitro degradability (r=-0.82 and r=-0.72, respectively). A multiple regression analysis showed that more than 80% of cell wall degradability variations within these 10 lines (eight recombinant inbred lines and their two parents) were explained by a regression model including two main explanatory factors: lignin content and estimated proportion of syringyl lignin units esterified by p-coumaric acid. This study revealed new biochemical parameters of interest to improve cell wall degradability and promote lignocellulose valorization.
authors.affiliation: Institut Jean-Pierre Bourgin, UMR 1318 INRA/AgroParisTech, Pôle SCSM, 78000 Versailles, France.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Tanya
authors.initials: T
authors.lastname: Culhaoglu
authors.forename: Brigitte
authors.initials: B
authors.lastname: Pollet
authors.forename: Corinne
authors.initials: C
authors.lastname: Melin
authors.forename: Dominique
authors.initials: D
authors.lastname: Denoue
authors.forename: Yves
authors.initials: Y
authors.lastname: Barrière
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Baumberger
authors.forename: Valérie
authors.initials: V
authors.lastname: Méchin
mesh_terms: D002473:Cell Wall / Q000737:chemistry* / Q000378:metabolism*; D003373:Coumaric Acids / Q000032:analysis / Q000737:chemistry; D004951:Esterification; D008031:Lignin / Q000032:analysis / Q000737:chemistry*; D030821:Plants, Genetically Modified / Q000648:ultrastructure*; D011422:Propionates; D003313:Zea mays / Q000648:ultrastructure*
chemical_list: D003373:Coumaric Acids; D011422:Propionates; D008031:Lignin; C495469:p-coumaric acid