中文摘要：

利用X-射线CT扫描技术观察云南晚中新世松属球果化石的内部结构,并与现代种的内部结构进行比较。这是该技术在中国古植物学研究中的首次报道。通过内部结构的比较发现,松属化石最接近于现生种喀西亚松（Pinus kesiya）。CT扫描技术可以在不破坏标本的前提下观察植物化石的内部结构,对于较珍贵的化石研究作用尤为明显,但是分辨率的高低是该技术广泛应用于古植物学的重要因素,随着扫描仪器分辨率的不断提高,CT扫描技术将提供植物化石内部结构的更多细节信息,从而为古植物学研究开辟一条新的技术途径。

英文摘要：

The present work employed an X-ray CT scanner to study a fossil pine cone recovered from the upper Miocene in Yunnan.This is the first attempt to apply the technique on Chinese fossil plant material.The X-ray CT scanner has revealed the detailed internal structure of the pine cone;this structure is useful for a close comparison with the extant Pinus kesiya.The pros and cons of the technique are discussed.The most interesting value of this technique is not only that the fossils examined are saved from any destruction preparation,but also does it show the diagnostic characters that can usually be acquired after tedious procedures of preparation.At the moment,the level of resolution is the limiting factor for a wide application of this technique.There is little doubt that,once the resolution is improved,this technique may become a brand new way of research on fossil plants.