  The tension wood (TW) properties of a 70 year-old Acer sieboldianum Miq were
analyzed by using the G-fiber model which was proposed in our previous paper.
The roles of the G-layer on the origins of (1) a high large tensile growth
stress, (2) a large longitudinal Young's modulus, and (3) a high longitudinal
drying shrinkage in the tension wood xylem were discussed on the basis of the
simulations using the G-fiber model. The results suggest that the G-layer
generates a high tensile stress in the longitudinal direction during the xylem
maturation; the longitudinal Young's modulus of the green G-layer becomes
significantly higher than that of the lignified layer; furthermore, the G-layer
tends to shrink extraordinarily higher than that of the lignified layer during
the moisture desorption.
