Anatomical Properties of Compression, Lateral, and Opposite Wood in a Stem of Ginkgo biloba L.

다국어 초록 (Multilingual Abstract)

This study was performed to understand and compare the anatomical characteristics of compression, lateral, and opposite wood in a stem of Ginkgo biloba L. The qualitative and quantitative aspects were examined by optical and scanning electron microscopy, while crystalline characteristics were evaluated with an X-ray diffraction method. The compression and opposite wood showed abrupt transition from earlywood to latewood, while the lateral wood showed gradual transition. The compression wood of Ginkgo biloba showed circular shape tracheids, intercellular spaces, varied size of lumen and few spiral checks in cross section. In radial section, the compression wood showed slit-like bordered pits on the cell wall and piceoid pit in the crossfield, also few spiral checks appeared . Uniseriate rays frequently appeared with few biseriate rays in the tangential section. The lateral wood showed rectangular shape tracheids, varied size of lumen and few intercellular spaces were found in cross section, compared to the compression wood. In radial section, the lateral wood cuppresoid pit in the crossfield. Uniseriate rays frequently appeared with few biseriate rays in the tangential section. The opposite wood showed similar characteristics with lateral wood in cross, tangential, and radial section. The compression wood had shorter tracheid lengths than the opposite and lateral wood. Tracheid lengths were consistently increased with increasing annual rings in the compression, opposite, and lateral wood. The number and heights of rays significantly different among compression, lateral, and opposite wood. Compression wood had lower relative crystallinity than both lateral wood and opposite wood.