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Author Abedini, R.; Clair, B.; Pourtahmasi, K.; Laurans, F.; Arnould, O. url  openurl
  Title Cell wall thickening in developing tension wood of artificially bent poplar trees Type Journal Article
  Year 2015 Publication IAWA Journal Abbreviated Journal IAWA Journal  
  Volume 36 Issue 1 Pages 44-57  
  Keywords developing xylem; Gelatinous layer; maturation stress; secondary wall layer; tree biomechanics  
  Abstract (up) Trees can control their shape and resist gravity thanks to their ability to produce wood under tensile stress. This stress is known to be produced during the maturation of wood fibres but the mechanism of its generation remains unclear. This study focuses on the formation of the secondary wall in tension wood produced in artificially tilted poplar saplings. Thickness of secondary wall layer (SL) and gelatinous layer (GL) were measured from cambium to mature wood in several trees sampled at different times after tilting. Measurements on wood fibres produced before tilting show the progressive increase of secondary wall thickness during the growing season. After the tilting date, SL thickness decreased markedly from normal wood to tension wood while the total thickness increased compared to normal wood, with the development of a thick GL. However, even after GL formation, SL thickness continues to increase during the growing season. GL thickening was observed to be faster than SL thickening. The development of the unlignified GL is proposed to be a low cost, efficient strategy for a fast generation of tensile stress in broadleaved trees. © 2015 International Association of Wood Anatomists.  
  Address INRA, UR588 Amélioration, Génétique et Physiologie ForestièresOrléans, France  
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  Area Expedition Conference  
  Notes Export Date: 17 April 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 596  
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