中国云南早泥盆世坡松冲植物群——探究早期陆生维管植物演化分异的窗口

简要回顾了目前云南早泥盆世坡松冲植物群的研究，论述了坡松冲植物群的时代、组成和性质。研究表明坡松冲植物群在某些简单的、常见的工蕨类植物和三枝蕨类植物组成的背景下，含有具复杂形态和结构特征的植物类群，显示了较劳亚大陆同期陆生维管植物更进化的营养器官、生殖器官分异的水平。不同古植物地理区的长期隔离（也就是，早泥盆世的东北冈瓦纳古植物地理区和华南亚区）和独特的环境可能是造成众多地方性分子演化分异的原因。坡松冲植物群的研究表明中国华南可能是早期陆生维管植物演化辐射的中心之一。

THE EARLY DEVONIAN POSONGCHONG FLORA OF YUNNAN, CHINA--A WINDOW FOR RESEARCH ON EVOLUTION AND DIVERSITY OF EARLY LAND VASCULAR PLANTS

The paper presents a brief summary of current knowledge on the Early Devonian Posongchong flora, with its age, floral components and features discussed. Researches indicate that, within a background of less complex, cosmopolitan zosterophyll and trimerophyll taxa, the Posongchong flora has some plants with complex combination of morphological and structural characters, showing more advanced level of fertile and sterile organs than those found in contemporaneous land vascular plants from Laurussia. The long isolation in the different phytogeographical units(WTBX]i.eWTBZ]. the northeastern Gondwana unit and south China subunit during the Early Devonian) and different environment may result in the evolution and diversify of numerous endemics. Researches of the Posongchong flora indicate that south China may have been one of the centers of radiation of early land vascular plants.