Advanced search
Add to list

How does bark contribution to postural control change during tree ontogeny? A study of six Amazonian tree species

Author
Organization
Abstract
<jats:title>Abstract</jats:title> <jats:p>Recent works revealed that bark is able to produce mechanical stress to control the orientation of young tilted stems. Here we report how the potential performance of this function changes with stem size in six Amazonian species with contrasted bark anatomy. The potential performance of the mechanism depends both on the magnitude of bark stress and the relative thickness of the bark. We measured bark longitudinal residual strain and density, and the allometric relationship between bark thickness and stem radius over a gradient of tree sizes.</jats:p> <jats:p>Constant tensile stress was found in species that rely on bark for the control of stem orientation in young stages. Other species had increasing compressive stress, associated with increasing density attributed to the development of sclereids. Compressive stress was also associated with low relative bark thickness. The relative thickness of bark decreased with size in all species, suggesting that a reorientation mechanism based on bark becomes progressively less performant as the tree grows. However, larger relative thickness was observed in species with more tensile stress, thereby evidencing that this reduction in performance is mitigated in species that rely on bark for reorientation.</jats:p>
Keywords
Plant Science, Physiology

Citation

Please use this url to cite or link to this publication:

MLA
Lehnebach, Romain, et al. “How Does Bark Contribution to Postural Control Change during Tree Ontogeny? A Study of Six Amazonian Tree Species.” Journal of Experimental Botany, 2020.
APA
Lehnebach, R., Alméras, T., & Clair, B. (2020). How does bark contribution to postural control change during tree ontogeny? A study of six Amazonian tree species. Journal of Experimental Botany.
Chicago author-date
Lehnebach, Romain, Tancrède Alméras, and Bruno Clair. 2020. “How Does Bark Contribution to Postural Control Change during Tree Ontogeny? A Study of Six Amazonian Tree Species.” Journal of Experimental Botany.
Chicago author-date (all authors)
Lehnebach, Romain, Tancrède Alméras, and Bruno Clair. 2020. “How Does Bark Contribution to Postural Control Change during Tree Ontogeny? A Study of Six Amazonian Tree Species.” Journal of Experimental Botany.
Vancouver
1.
Lehnebach R, Alméras T, Clair B. How does bark contribution to postural control change during tree ontogeny? A study of six Amazonian tree species. Journal of Experimental Botany. 2020;
IEEE
[1]
R. Lehnebach, T. Alméras, and B. Clair, “How does bark contribution to postural control change during tree ontogeny? A study of six Amazonian tree species,” Journal of Experimental Botany, 2020.
@article{8647605,
  abstract     = {<jats:title>Abstract</jats:title>
               <jats:p>Recent works revealed that bark is able to produce mechanical stress to control the orientation of young tilted stems. Here we report how the potential performance of this function changes with stem size in six Amazonian species with contrasted bark anatomy. The potential performance of the mechanism depends both on the magnitude of bark stress and the relative thickness of the bark. We measured bark longitudinal residual strain and density, and the allometric relationship between bark thickness and stem radius over a gradient of tree sizes.</jats:p>
               <jats:p>Constant tensile stress was found in species that rely on bark for the control of stem orientation in young stages. Other species had increasing compressive stress, associated with increasing density attributed to the development of sclereids. Compressive stress was also associated with low relative bark thickness. The relative thickness of bark decreased with size in all species, suggesting that a reorientation mechanism based on bark becomes progressively less performant as the tree grows. However, larger relative thickness was observed in species with more tensile stress, thereby evidencing that this reduction in performance is mitigated in species that rely on bark for reorientation.</jats:p>},
  author       = {Lehnebach, Romain and Alméras, Tancrède and Clair, Bruno},
  issn         = {0022-0957},
  journal      = {Journal of Experimental Botany},
  keywords     = {Plant Science,Physiology},
  language     = {eng},
  title        = {How does bark contribution to postural control change during tree ontogeny? A study of six Amazonian tree species},
  url          = {http://dx.doi.org/10.1093/jxb/eraa070},
  year         = {2020},
}

Altmetric
View in Altmetric