Structure of heteroxylans from vitreous and floury endosperms of maize grain and impact on the enzymatic degradation
2022
Bonnin, Estelle | Joseph-Aimé, Maud | Fillaudeau, Luc | Durand, Sylvie | Falourd, Xavier | Gall, Sophie Le | Saulnier, Luc | Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Toulouse Biotechnology Institute (TBI) ; Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) ; Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | BIBS - Plateforme Bioressources : Imagerie, Biochimie & Structure ; Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-INRAE, PROBE Research Infrastructure | INRAE, PROBE Research Infrastructure | ADISSEO for funding the stay of MJA in our laboratories and Pierre-André Geraerts and Virginie Neugnot-Roux from ADISSEO France S.A.S.
International audience
Show more [+] Less [-]English. Heteroxylans (HX) from vitreous and floury parts of maize endosperm were isolated. Structural analysis showed a xylan backbone with few unsubstituted xylose residues (<9%) demonstrating the high content in side chains in both fractions. HX from floury endosperm contained more arabinose and galactose than vitreous HX. The mono-substitution rate was 15% higher in the vitreous endosperm HX. Similar amounts of uronic acids were present in both fractions (~7% DM). Galactose in the floury endosperm HX was present exclusively in terminal position. A xylanase preparation solubilized more material from floury (40.5%) than from vitreous endosperm cell walls (15%). This could be a consequence of the structural differences between the two fractions and/or of the impact of structure on the interaction abilities of these fractions with other cell wall polysaccharides.Our study advances the understanding of cell wall polysaccharides in maize endosperm and their role in enzymatic susceptibility of maize grain.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Institut national de la recherche agronomique