Bruno Clair

Researcher at EcoFoG until 1st october 2018

email : bruno.clair at

Main scientific topics

1. Biomecanics: Study of the mechanisms allowing uprighting of trees from macro scale to macromolecular level.

- Mechanical behaviour and uprighing of sapling and adult trees in tropical rain forest

- Systematic anatomy of tension wood in tropical species

- Relationship between wood structure and growth stresses at the cell wall level

- Maturation stress generation in trees: study of the mechanism inducing tension in cellulose during cell maturation

- Development of the gelatinous layer in tension wood

2. Structure / properties relationship in wood: consequences of reaction wood on wood quality.

- Physical (drying shrinkage) and mechanical properties (growth stresses, MOE) of tension wood in relation with anatomy and ultrastructure (cellulose organisation)

- Microstructural determinants of viscoelasticity in wood and wood cell wall

- Consequences of growth stresses on drying

- Microscopic origin of drying shrinkage in tension wood

- Microcaracterisation of wood cell wall (microfibril angle, mesoporosity, sorption, composition)

- Traditional use of wood in building by ancient communities of French Guiana

Short CV

From 2012 CNRS researcher in EcoFoG
2009 Habilitation (HDR, Montpellier University)
2004-2012 CNRS researcher in Laboratory of Mechanics and Civil Engineering (LMGC), Montpellier University
2002-2004 Post-Doc in Wood Research Institute (Kyoto University , Japan)
2001-2002 Post-Doc in EcoFoG (Kourou)
2001 PhD in Forestry and Wood Sciences (ENGREF)
1998 D.E.A.“Wood Sciences” ENGREF-Nancy


List of publications

To access to the complete list and full texts of publications, click here

Last Publications with EcoFoG

Lehnebach, R., et al. "Mechanical stress in the inner bark of 15 tropical tree species and the relationship with anatomical structure." Bot.. 98.1 (2020): 1–8.
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Ghislain, B., et al. "Diversity of anatomical structure of tension wood among 242 tropical tree species." IAWA Journal. 40.4 (2019): 765–784.
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Ghislain, B., et al. "Contributions of bark and tension wood and role of the G-layer lignification in the gravitropic movements of 21 tropical tree species." Ann. Forest Sci.. 76.4 (2019): 107.
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Clair, B., et al. "Mechanical contribution of secondary phloem to postural control in trees: the bark side of the force." New Phytol. 221.1 (2019): 209–217.
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Bossu, J., et al. "Interlocked grain and density patterns in Bagassa guianensis: changes with ontogeny and mechanical consequences for trees." Trees. 32.6 (2018): 1643–1655.
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