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Physiologie de la formation des parois de fibres de bois

Abstract : The heteroxylated wood of hardwood species is constituted of fibres, vessels and ray cells. Fibres play a prominent role in the mechanical support of the tree and in the ability of trees to reach a big size. Fibres result from cambium activity that takes place just under the bark, between phloem and xylem. The fibre cell wall is made of several layers of a cellulose microfibril network glued into a matrix of lignins and hemicelluloses. These layers widely differ according to their thickness, lignin content and cellulose microfibril orientation. The fibre cell wall can be compared to a composite material, whose properties depend on matrix composition and cellulose microfibril orientation. The wood properties largely result from variations in cell wall composition and arrangement. In this paper, we will review the state of knowledge on wood fibre formation and we will introduce functional genomics strategy currently developed on a model species, poplar, in order to increase our knowledge on wood fibre biogenesis.
Mots-clés : PEUPLIER
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https://hal.inrae.fr/hal-02665320
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Submitted on : Sunday, May 31, 2020 - 6:32:43 AM
Last modification on : Friday, July 9, 2021 - 3:32:02 PM

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  • HAL Id : hal-02665320, version 1
  • PRODINRA : 10709

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Françoise Laurans, Annabelle Dejardin, Jean-Charles Leplé, Gilles Pilate. Physiologie de la formation des parois de fibres de bois. Revue des composites et des matériaux avancés, Lavoisier, 2006, 16 (1), pp.25-40. ⟨hal-02665320⟩

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