榄李属(Lumnitzera)红树植物的木材解剖学研究

通过光学显微镜、扫描电子显微镜、激光共聚焦扫描显微镜详细观察了榄李属2种红树植物次生木质部的形态特征.应用Lasersharp软件测量了其次生木质部的数量特征.结果表明:1)榄李属植物的木材结构具有与海岸潮间带生境相适应的特征;2)榄李和红榄李生态隔离现象导致这两种植物次生木质部数量特征具有显著差异;3)榄李属植物附物纹孔的差异具种类鉴定意义;4)榄李属植物次生木质部管孔直径、管孔密度及附物纹孔的差异表明附物纹孔的结构有助于水分运输的安全性.

Study on Wood Anatomy of Lumnitzera Species

The morphological features in secondary xylem of 2 Lumnitzera species were surveyed in details by means of optical microscope, scanning electronic microscope and laser scanning confocal microscope. The quantitative features in secondary xylem were measured by means of software Lasersharp. These results showed as follows: 1) wood structures are adaptive to the intertidal habitats. 2) the differences in wood structure between L.littorea and L. racemosa presumably stem from the different ecological sites that two species occupy. 3) the differences in vesturing between L. littorea and L. racemosa can be served as the diagnostic features. 4) the differences in pore diameter, pore density and vestured pits between L. littorea and L. racemosa tend to support the viewpoints claimed by Carlquist: vesturing is regarded as helpful to conductive safety.