TY  - JOUR
AU  - Almeras, T.
PY  - 2008//
TI  - Mechanical analysis of the strains generated by water tension in plant stems. Part II: strains in wood and bark and apparent compliance
T2  - Tree Physiol.
JO  - Tree Physiology
SP  - 1513
EP  - 1523
VL  - 28
IS  - 10
PB  - HERON PUBLISHING
KW  - biomechanics
KW  - calibration
KW  - diurnal strains
KW  - mechanical model
KW  - multilayer cylinder
KW  - water potential
N2  - Tree steins shrink in diameter during the day and swell during the night in response to changes in water tension in the xylem. Stein shrinkage can easily be measured in a nondestructive way, to derive continuous information about tree water status. The relationship between the strain and the change in water tension can be evaluated by empirical calibrations, or can be related to the structure of the plant. A mechanical analysis was performed to make this relationship explicit. The stem is modeled as a cylinder made of multiple layers of tissues, including heartwood, sapwood, and inner and outer bark. The effect of changes in water tension on the apparent strain at the surface of a tissue is quantified as a function of parameters defining stem anatomy and the mechanical properties of the tissues. Various possible applications in the context of tree physiology are suggested.
SN  - 0829-318X
N1  - ISI:000260027200009
ID  - Almeras2008
ER  -