关键词: 黄山松, 台湾松, 超微结构

Abstract: 9 Pieces of wood samples of Pinus hwangshanensis were taken from Jiuxiang Mountain in Dehua county in Fujian Province, to northern Dabie Mountain. Another 2 pieces of samples of P. taiwanensis were from Taiwan Province. The research checked Pinus hwangshanensis against P. taiwanensis in wood microscopic structure and ultra-microstructure. The findings indicate:Different geographical position and environment conditions have an influence on wood anatomy of Pinus hwangshanensis. The structure of the annual ring changes with Latitude. From south to north it had a trend that the transition from early wood to late wood was from gradual to moderately abrupt then to abrupt. The distribution of longitudinal resin ducts altered from being in earlywood area for the most part to being in earlywood-latewood transition area, then to being in latewood area mainly. The results on ultra-microstructure show:P. hwangshanensis had a close relative in taxonomy to P. Taiwanensis, but some important characteristics distinguished between two things.To the former,the dentate ray trachied thickenings became more shallow and the part tips of the dentate connected in fine net-shaped, to bordered pit of trachied the torus was bigger,the radial supporting strands made of microfibril in the margo region of the closing membrane thickened,obviously; To the latter the dentate ray trachied thickening became deeper, connected in net-shaped, around the torus there were deposited amorohous substance bulging and forming dish-shaped.The radial supporting strands in the margo region of closing membrane not being clear, some microfobril surouded like concentric circles. It results that the two kinds of tree must belong to different species by the evidence of wood microscopic structure and ultra-microstructure.

Key words: PINUS HWANGSHANENSIS, PINUS TAIWANENSIS, ULTRA-MICROSTRUCTURE