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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Wheat grain growth is strangled by bonds between cell-wall polymers

Polymers in the cell walls of cereal grains are assigned important biological, nutritional and technological roles. Our research focused on cell walls of the outer layer in the developing wheat grain.

The cell walls surrounding plant cells are composed of tightly-interwoven polymer networks whose composition and structure vary between species, development stage, tissue and organ. We used a multi-approach battery of imaging and biochemistry methods on hand-dissected tissue specimens to investigate the cell walls in the outer layers of the wheat grain (Recital cultivar) at a series of developmental stages. Unexpected results were observed for external tissues 1) the presence of lignins at early growth stages 2) changes in cell-wall properties likely due to covalent crosslinking between cell-wall polymers. Our findings suggest that major structural cell-wall changes occur late into development in the outer pericarp and that these changes could be part of a system that arrests grain growth and thus determines grain size.


IJPB INRA Versailles, GDEC INRA Clermont-Ferrand, IATE INRA Montpellier


Anne-Laure Chateigner-Boutin, Catherine Lapierre, Camille Alvarado, Arata Yoshinaga, Cécile Barron, Brigitte Bouchet, Bénédicte Bakan, Luc Saulnier, Marie-Françoise Devaux, Christine Girousse, Fabienne Guillon. 2018. Ferulate and lignin cross-links increase in cell walls of wheat grain outer layers during late development. Plant Science 276:199-207. DOI : 10.1016/j.plantsci.2018.08.022

See also

Integrality of the result  >>>