caa a22 4500 463216830 CHVBK 20180405153159.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s00226-007-0148-3 doi (NATIONALLICENCE)springer-10.1007/s00226-007-0148-3 Transverse shrinkage in G-fibers as a function of cell wall layering and growth strain [Elektronische Daten] [Chang-Hua Fang, Bruno Clair, Joseph Gril, Tancrède Alméras] Transverse drying shrinkage was measured at microscopic and mesoscopic levels in poplar wood characterised by an increasing growth strain (GS), from normal to tension wood. Results show that: (a) the drying shrinkage, measured as a relative thickness decrease, was significantly higher for G-layer (GL) than for the other layers (OL), GL shrinkage was not significantly correlated with GS, and OL shrinkage was negatively correlated with GS. (b) In gelatinous fibre (G-fibre), lumen size increased during drying and this increase was positively related with GS, but in normal wood fibre, lumen size decreased during drying. These findings suggest that GL shrank outwards (i.e., its internal perimeter increases), so that its shrinkage weakly affected the total cell shrinkage and the mesoscopic shrinkage was controlled by the OL shrinkage which shrank inwards (i.e., its external perimeter decreases). (c) Measurements done on 7×7mm² thin sections evidenced a negative correlation between transverse shrinkage and GS, significant in T direction but weak in R direction. These observations at both levels allow to discuss the contribution of GL to the mesoscopic shrinkage of tension wood. Springer-Verlag, 2007 Fang Chang-Hua Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut Clair Bruno Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut Gril Joseph Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut Alméras Tancrède UMR Ecologie des Forêts de Guyane, BP 709, 97387, Kourou cedex, French Guiana aut Wood Science and Technology Springer-Verlag 41/8(2007-12-01), 659-671 0043-7719 41:8<659 2007 41 226 https://doi.org/10.1007/s00226-007-0148-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-007-0148-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fang Chang-Hua Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut NATIONALLICENCE 700 1- Clair Bruno Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut NATIONALLICENCE 700 1- Gril Joseph Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, Place E. Bataillon, cc 048, 34095, Montpellier cedex 5, France aut NATIONALLICENCE 700 1- Alméras Tancrède UMR Ecologie des Forêts de Guyane, BP 709, 97387, Kourou cedex, French Guiana aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/8(2007-12-01), 659-671 0043-7719 41:8<659 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer