摘要
根据100种中国裸子植物木材(隶属4纲、8目、11科,42属)具缘纹孔构造的研究,提出8种不同具缘纹孔类型:1.苏铁型;2.南洋杉 A 型;3.南洋杉 B 型;4.落羽杉 A 型;5.落羽杉 B 型;6.松木 A 型;7.松木 B 型;8.买麻藤型。A 型是指纹孔室内瘤状层缺乏或罕见,B型则具明显的瘤状层。并对具缘纹孔在系统发育中的变化进行了讨论。
The structural types of bordered pits are the important characteristics of wood ultrastruc- ture in gymnospermous woods have a certain value for the classification of wood.This study was based on the fine structures of bordered pits of 4 classes,8 orders,11 families,42 genera and 100 species in gymnospermous woods of China,in which the authors suggested that bor- dered pits could be classified into 8 different types:1.Cycas-type,2.Araucaria-type A,3. Araucaria-type B,4.Pinus-type A,5.Pinus-type B,6.Taxodium-type A,7.Taxodium-type B, 8.Gnetum-type.In type A,the warty layer is absent or rare in pit chamber and in type B, the warty layer is present,in this paper,the variation in phylogeny of the pit membrane in bordered pits is also discussed.
基金
国家自然科学基金资助课题
关键词
裸子植物
具缘纹孔
构造类型
Bordered pit
Torus
Margo
Structural types of bordered pit
Gymnosperms.
