Maturation stress generation starts before the formation of the G-layer in poplar tension wood

Bruno Clair (1) , Tancrède Alméras (1) , Gilles Pilate (2) , Delphine Jullien (1) , Junji Sugiyama (3) , Christian Riekel (4)

1 MAB - Mécanique de l'Arbre et du Bois
2 AGPF - Unité de recherche Amélioration, Génétique et Physiologie Forestières
3 RISH - Research Institute for Sustainable Humanosphere
4 Microfocus Beamline ID 13

Tension wood is widespread in organs of woody plants. During its formation, it generates large tensile mechanical stress, called maturation stress [1]. This stress performs essential biomechanical functions such as optimizing the stem mechanical resistance, performing adaptive movements and ensuring long-term stability of growing plants. The mechanism generating this stress is not yet fully understood, although various hypotheses have recently been proposed [2-6]. In order to discriminate between these hypotheses, we investigated structural changes in cellulose microfibrils along sequences of xylem cell differentiation in tension and normal wood of poplar.

Domaines: Biomécanique [physics.med-ph]; Biomécanique [physics.med-ph]

Bruno Clair, Tancrède Alméras, Gilles Pilate, Delphine Jullien, Junji Sugiyama, et al.. Maturation stress generation starts before the formation of the G-layer in poplar tension wood. COST E50 final conference Systems Biology for Plant Design, 2009, Netherlands. 2p. ⟨hal-00797323⟩