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Anatomical characteristics of tension wood and opposite wood in young inclined stems of poplar (Populus euramericana cv ‘Ghoy’)
Jourez, Benoît; Riboux, Alain; Leclercq, André
2001In IAWA Journal, 22 (2), p. 133-157
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Keywords :
Populus euramericana cv 'Ghoy'; Tension wood; Gravitational stimulus; Opposite wood; Image analysis; Vessel
Abstract :
[en] Young shoots from poplar cuttings (P. euramericana cv ‘Ghoy’) were artificially inclined to 30° from vertical to quantify the anatomical modifications induced by this gravitational stimulus. At the end of the growing season, the tension wood tissue (from the upper face of the inclined axis) was compared to the opposite wood tissue (from the lower face), with radial position taken into account. On isolated elements after maceration, fibres and vessels were significantly longer in tension wood tissue. In the cross section, the gelatinous fibres had a smaller radial diameter than normal fibres in opposite wood. Vessel frequency and porosity were significantly lower in tension wood than opposite wood. Solitary vessels in tension wood were less circular in cross section than in opposite wood, but their surface area did not differ. Rays were more numerous in tension wood than opposite wood but their height did not differ between the two tissue types. Finally, there was a negative correlation between the proportion of vessels lumina (lowest in tension wood) and the proportion of fibres lumina including the G layer. The very controlled nature of this experiment (greenhouse, young clonal material, detailed anatomical observations within one growth ring) and the image analysis technology (allowing a large number of observations) enabled us to draw conclusions that may not have been seen in less-controlled experiments and/or those with smaller sample sizes.
Research center :
Centre de Recherches de la Nature, des Forêts et du Bois
Disciplines :
Agriculture & agronomy
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Jourez, Benoît ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels
Riboux, Alain
Leclercq, André
Language :
English
Title :
Anatomical characteristics of tension wood and opposite wood in young inclined stems of poplar (Populus euramericana cv ‘Ghoy’)
Alternative titles :
[fr] Caractéristiques anatomiques du bois de tension et du bois opposé dans de jeunes pousses inclinées de peuplier (Populus euramericana cv 'Ghoy').
Publication date :
2001
Journal title :
IAWA Journal
ISSN :
0928-1541
Publisher :
Int Assoc Wood Anatomists, Leiden, Netherlands
Volume :
22
Issue :
2
Pages :
133-157
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
DGRNE - Région wallonne. Direction générale des Ressources naturelles et de l'Environnement [BE]
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since 11 July 2011

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