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本文应用扫描电镜观察了99种裸子植物木材结构,其中20种(隶属7科12属)木材中含有晶体。晶体分为5个类型。晶体的存在与否及其形状、大小和分布可作为鉴别木材的辅助特征。用 EDAX 和组织化学方法确认晶体为钙晶体,钙元素的含量占99%以上。在铁坚油杉(Keteteeria davidiana)等4种木材中可见由菌丝产生的晶体,是真菌新陈代谢的产物。并首次在紫果冷杉(Abies recurvata)的管胞内壁、射线细胞内及纹孔缘上观察到硅石的存在,其形状不规则,硅的含量为93.75%。同时还讨论了晶体、硅石发生的原因及存在意义。
In this paper, the scanning electron microscopy of 99 species of gymnosperms wood structure, of which 20 (belonging to 7 families and 12 genera) wood contains crystals. Crystal is divided into five types. The presence or absence of crystals and their shape, size and distribution can be used as an aid to characterize wood. Using EDAX and histochemical methods to confirm the crystal is calcium crystal, calcium content of more than 99%. Crystals produced by mycelium are visible in four species of wood, such as Keteteeria davidiana, and are the product of fungal metabolism. For the first time, Silica was observed on the inner wall of tracheids, in the ray cells and on the margins of the margins of Abies recurvata. The shape of the silica was irregular and the content of silicon was 93.75%. At the same time, the reasons and the existence of the crystal and silica are also discussed.