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New insights on wood dimensional stability influenced by secondary metabolites: The case of a fast-growing tropical species Bagassa guianensis Aubl.

Bossu Julie, Beauchêne Jacques, Estevez Yannick, Duplais Christophe, Clair Bruno. 2016. New insights on wood dimensional stability influenced by secondary metabolites: The case of a fast-growing tropical species Bagassa guianensis Aubl.. PloS One, 11 (3):e0150777, 17 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Url - jeu de données : https://doi.org/10.6084/m9.figshare.2747995.v1 / Url - jeu de données : http://www.ecofog.gf/mariwenn/

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Abstract : Challenging evaluation of tropical forest biodiversity requires the reporting of taxonomic diversity but also the systematic characterization of wood properties in order to discover new promising species for timber industry. Among wood properties, the dimensional stability is regarded as a major technological characteristic to validate whether a wood species is adapted to commercial uses. Cell structure and organization are known to influence the drying shrinkage making wood density and microfibrils angle markers of choice to predict wood dimensional stability. On the contrary the role of wood extractive content remains unclear. This work focuses on the fast-growing tropical species Bagassa guianensis and we report herein a correlation between heartwood drying shrinkage and extractive content. Chemical extractions and shrinkage experiments were performed on separate wood twin samples to better evaluate correctly how secondary metabolites influence the wood shrinkage behaviour. Extractive content were qualitatively and quantitatively analysed using HPLC and NMR spectroscopy. We found that B guianensis heartwood has a homogeneous low shrinkage along its radius that could not be explained only by its basic density. In fact the low drying shrinkage is correlated to the high extractive content and a corrected model to improve the prediction of wood dimensional stability is presented. Additionally NMR experiments conducted on sapwood and heartwood extracts demonstrate that secondary metabolites biosynthesis occurs in sapwood thus revealing B. guianensis as a Juglans-Type heartwood formation. This work demonstrates that B. guianensis, a fast-growing species associated with high durability and high dimensional stability, is a good candidate for lumber production and commercial purposes.

Mots-clés Agrovoc : Bagasse, Bois, Bois de coeur, Composition chimique, Extrait de bois, Propriété mécanique, Propriété physicochimique, Propriété technologique, Densité, Retrait, Séchage, Utilisation, Mesure, Modèle de simulation, Méthode statistique

Mots-clés géographiques Agrovoc : Guyane française

Mots-clés complémentaires : Bagassa guianensis

Classification Agris : K50 - Processing of forest products
F60 - Plant physiology and biochemistry
U10 - Computer science, mathematics and statistics

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

  • Bossu Julie, CNRS (FRA)
  • Beauchêne Jacques, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0003-4578-3670
  • Estevez Yannick, CNRS (FRA)
  • Duplais Christophe, CNRS (FRA)
  • Clair Bruno, CNRS (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580216/)

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