被子植物起源和早期演化研究的回顾与展望

近年来，被子植物起源和早期演化研究，由于手段和技术的更新，资料大量积累，取得了许多重要进展，成为植物学领域的一大热点。本文对过去近五十年的研究作了回顾，并从分子系统学、分支系统学、花原基发生的形态学、花发育的分子遗传学及白垩纪花和其它生殖结构化石研究等五个方面对该领域在最近十几年的研究进展进行综述，最后，对今后如何开展这方面的工作作了简要评论。

ORIGIN AND EARLY EVOLUTION OF ANGIOSPERMS: RETROSPECT AND PROSPECTS

With the advent of some new techniques, the past several years have been a time of fascinating discoveries on the origin and early evolution of angiosperms. Rapidly accumulating data have resulted in notable progress, and this field is becoming an active and exciting branch of botany. The paper, first, reviews the studies on early angiosperm evolution in the last fifty years; then discusses recent advances that have been made since early 1980s from five aspects, i.e., molecular systematics, cladistics, micromorphology of flowers under scanning electron microscopy, molecular genetics of floral development and the Cretaceous fossil flowers and other reproductive structures; finally, several future directions of the field are briefly discussed.