Composition and degradation of cell walls in red clover, lucerne and cereal straw [in sacco methods, rumen degradability, LCCs, lignin-carbohydrate complexes]

azucares cell structure cell walls ceras cire composition entre noeud estructura celular feuille hemicellulose hemicelulosa hojas in vitro experimentation internodes internodios leaves lignine lignins maturation medicago sativa paille paja pared celular paroi cellulaire pectinas pectine pectins proteine proteins straw structure cellulaire sucres sugars trifolium pratense ultraestructura ultrastructure waxes