Journal Title
Title of Journal: Trees
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Publisher
Springer-Verlag
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Authors: Karen K ChristensenDalsgaard Anthony R Ennos Meriem Fournier
Publish Date: 2008/02/14
Volume: 22, Issue: 4, Pages: 543-550
Abstract
To investigate the effect of changes in mechanical loading conditions on radial anatomical patterns we here compare the trunk with the roots in two locations of three species of buttressed trees The proximal part of the buttress roots is highly mechanically loaded throughout juvenile growth whereas the distal part of the buttresses is though to be mechanically unimportant at formation but become progressively more mechanically loaded during growth We measured the frequency and diameter of the vessels and the vessel area fraction and from this calculated the specific conductivity of tissue samples of the core intermediate and outer wood As in previous studies there was an increase in vessel size vessel area fraction and specific conductivity from the pith to the bark in the trunk In the proximal part of the buttress roots however there was no increase in vessel size and conductivity from core wood and out in agreement with the high mechanical loading found here throughout growth There was instead a decrease in vessel size vessel area fraction and specific conductivity from core to outer wood in the distal part of the buttress roots in accordance with the increase in mechanical loading Hence it appears that the radial anatomical patterns are not a passive function of cambial ageing but may be modified in response to local mechanical loadingThis project would not have been possible but for the grant holder of the project Anders Barfod to whom we are deeply indebted We would further wish to acknowledge Pascal Imbert Paolo Mussone and Audin Patient for invaluable help in the field and Pascal Petronelli for help with identifying the species We are grateful to Lilian Blanc and CIRAD’s authorities for providing access to the Paracou facilities and Jacques Beauchene and the Wood lab of CIRAD for help and providing access to equipment Finally we are indebted to two anonymous referees whose comments improved the final version of the paper This project was conducted as part of KKCD’s PhD study at the University of Manchester funded by the Danish Agency for Science Technology and Innovation to Anders Barfod grant 645030175 Additional funding in support of the field work was obtained from the project “Wood diversity Diversité des structures de bois et analyse biophysique des stratégies écologiques des ligneux en forêt tropicale humide” by MF and Bruno Clair from the French National Research Agency ANR
Keywords:
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