【摘要】 应用光学显微镜和扫描电子显微镜,首次对中国特有濒危植物崖柏的木材结构进行了研究,其主要特征为:生长轮中早材至晚材急变,晚材带较窄;轴向管胞较短,平均长度1.61±0.22mm(早材管胞)至1.74±0.26mm(晚材管胞),具缘纹孔单列,在纹孔缘外表面及其周围偶见少量稀疏瘤状物;交叉场纹孔为杉木型,2～6(8)个;木射线单列,高1～11(2～5)个细胞,每平方毫米具65～70条木射线,端壁节状加厚和凹痕均较明显;木薄壁组织细胞多分布在晚材带中,端壁节状加厚略明显。崖柏与该属的木材结构特征基本相符。在讨论中还与崖柏属其余4个种的木材结构特征作了详细比较。更多还原

【Abstract】 The wood anatomy of Thuja sutchuenensis,an endangered plant endemic to China, is observed for the first time under optical and scanning electron microscopes. Growth rings are delineated by a narrow darker band of thick-walled latewood tracheids with abrupt transition from earlywood (EW) to latewood (LW). Longitudinal tracheids are relatively short with an average value of 1.61±0.22 mm in EW tracheids and 1.74±0.26 mm in LW tracheids. The bordered pits are mostly uniseriate, warty layer occasionally occurred on the pit margo. Cross fields are predominantly taxodioid with 2-6(8) pits. Xylem rays are mostly uniseriate with 1-11(2-5) cells in height and 65-70 rays per mm~2 in density, among which nodular and indenture structure is apparent. The observation shows that the main characters of T. sutchuenensis wood are similar to those in other four species of this genus, providing evidence for the further investigation of T. sutchuenensis.更多还原