Precautions for the structural analysis of the gelatinous layer in tension wood

Origins of abnormal behaviors of gelatinous layer in tension wood fiber - A micromechanical approach

The mechanism responsible for unusual mechanical properties of tension wood gelatinous fiber (Gfiber) was investigated. We discussed origins of high tensile growth stress, high drying shrinkage, and rapid increase of Young’s modulus due to drying, in association with microscopic structure of gelatinous layer (G-layer). Anatomical, crystallographic, and micromechanical approaches were employed. ...

Growth stresses are highly controlled by the amount of G-layer in poplar tension wood

To determine how gelatinous fibres and gelatinous layers contribute to the magnitude of longitudinal growth stress in tension wood, anatomical measurements of gelatinous fibres were carried out on poplar tension wood (Populus I4551). It was found that (a) no gelatinous fibres were observed under a growth strain level of 0.06 to 20 0.08%; (b) almost 100% of the non-conductive tissues contained g...

Gibberellin mediates the development of gelatinous fibres in the tension wood of inclined Acacia mangium seedlings.

BACKGROUND AND AIMS Gibberellin stimulates negative gravitropism and the formation of tension wood in tilted Acacia mangium seedlings, while inhibitors of gibberellin synthesis strongly inhibit the return to vertical growth and suppress the formation of tension wood. To characterize the role of gibberellin in tension wood formation and gravitropism, this study investigated the role of gibberell...

On the detachment of gelatinous layer in tension wood fiber

The detachment of gelatinous layer (G-layer), often observed on microtome cross sections, leads some authors believe that G-layer cannot act as the driving force of longitudinal shrinkage in tension wood. The aim of this study was to observe the detachment of G-layer along fibres. Green wood block was cut transversely into two samples. One sample was kept in water and the other ovendried. One f...

Shrinkage of the Gelatinous Layer of Poplar and Beech Tension Wood