earticle

영어

The characteristics of cross-field pitting among compression wood (CW), lateral wood (LW), and opposite wood (OW), in the stem woods of Ginkgo biloba and Pinus densiflora were investigated with optical and scanning electron microscopy. In Ginkgo biloba, CW exhibited piceoid pits, while LW and OW exhibited cupressoid pits. The CW of Pinus densiflora exhibited cupressoid pits and piceoid pits, while LW exhibited taxodioid, pinoid, and window-like pits. In addition, the OW exhibited window-like and pinoid pits in the cross-field. In both species, CW yielded the smallest pit number among each part, while OW yielded the greatest pit number per cross-field. Cross-field pitting diameters of CW and OW were significantly smaller than LW in Ginkgo biloba, while the cross-field pitting of CW was the smallest in Pinus densiflora. Radial tracheid diameter of CW was slightly smaller than LW and OW in Ginkgo biloba and significantly smaller than LW and OW in Pinus densiflora. In conclusion, the cross-field pitting type, pit number, and cross-field pitting diameter could be highly used to identify reaction wood in the stem wood of Ginkgo biloba and Pinus densiflora.