In search of a maize ideotype for cell wall enzymatic degradability using histological and biochemical lignin characterization. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Agricultural and Food Chemistry Année : 2005

In search of a maize ideotype for cell wall enzymatic degradability using histological and biochemical lignin characterization.

Valérie Méchin
Odile Argillier
  • Fonction : Auteur
Françoise Rocher
  • Fonction : Auteur
Yannick Hébert
  • Fonction : Auteur
Isabelle Mila
Brigitte Pollet
  • Fonction : Auteur
Yves Barriére
  • Fonction : Auteur
Catherine Lapierre
  • Fonction : Auteur

Résumé

Grass cell wall degradability is conventionally related to the lignin content and to the ferulic-mediated cross-linking of lignins to polysaccharides. To better understand the variations in degradability, 22 maize inbred lines were subjected to image analyses of Fasga- and Mäule-stained stem sections and to chemical analyses of lignins and p-hydroxycinnamic acids. For the first time, the nearness of biochemical and histological estimates of lignin levels was established. Combination of histological and biochemical traits could explain 89% of the variations for cell wall degradability and define a maize ideotype for cell wall degradability. In addition to a reduced lignin level, such an ideotype would contain lignins richer in syringyl than in guaiacyl units and preferentially localized in the cortical region rather than in the pith. Such enrichment in syringyl units would favor wall degradability in grasses, contrary to dicots, and could be related to the fact that grass syringyl units are noticeably p-coumaroylated. This might affect the interaction capabilities of lignins and polysaccharides.

Dates et versions

hal-00441092 , version 1 (14-12-2009)

Identifiants

Citer

Valérie Méchin, Odile Argillier, Françoise Rocher, Yannick Hébert, Isabelle Mila, et al.. In search of a maize ideotype for cell wall enzymatic degradability using histological and biochemical lignin characterization.. Journal of Agricultural and Food Chemistry, 2005, 53 (15), pp.5872-81. ⟨10.1021/jf050722f⟩. ⟨hal-00441092⟩
26 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More