中国是世界上四大植物群独一无二的交汇地区，然而我国对安加拉植物群的正式研究起步较晚，研究程度与华夏植物群相比较低。在前期研究中，申请者在新疆北部吐鲁番—哈密盆地和准噶尔盆地发现了若干保存有大量精美植物化石的二叠系地质剖面，这些剖面的沉积学研究已经较为成熟。本课题拟通过采自该地区的化石植物为研究对象，通过植物化石分类学、木化石解剖学和比较形态学的研究，运用最新的国际分类学标准，准确认识该植物群的物种组成；综合古环境研究成果，整合植物叶片、种子以及木化石等记录，恢复植物生态群落；结合已有的古气候学研究成果，深入研究在气候变化条件下植物群演变的过程和规律；根据植物化石本身所蕴含的气候指示（如生长轮），对根据沉积学、地球化学信息推测的气候变化模式进行反方向的证实或证伪，共同提高二叠纪古气候学研究的精度。同时为预测其它安加拉区植物生存环境以及气候变化的总趋势提供科学依据。

China is the only country where the four major floras: Cathaysia, Angara, Euramerica and Gondwana floras were developed during the Permian time. However, the study of the Angara flora in our country began comparatively late, and it is at a low level. Therefore, an intensive research on this flora is critically necessary for a better understanding of Permian terrestrial ecosystems. In previous work, several geological sections, where preserved a vast amount of Permian fossil plants, were found from Turpan-Hami basin and Junngar basin, northern Xinjiang. This research area was an integral part of the Angaran phytoprovince in the Permian. In this project, we focus on the taxonomy of the fossil plants collected from northern Xinjiang. New classification systems will be utilized for the taxonomic research, especially for the dominant elements, such as Callipteris, Noeggerathiopsis and Iniopteris. The study of Angara flora is not limited to leaf assemblages, large number of fossil woods have also been found from the Permian deposits. They can supply different floristic information comparing to the leaves. Combining with previous palaeoclimatologic results, our investigation will also concentrate on the relationship between vegetation successions and climate change. Hopefully, this research will promote the status of the Chinese Angara flora to be academically on international level.