二叠纪-三叠纪之交地质突变期发生了显生宙以来最大规模的生物灭绝事件，海洋生态系统和陆地生态系统都受到了剧烈影响。新疆维吾尔族自治区准噶尔盆地南缘和吐鲁番-哈密盆地北缘发育了一系列完整的陆相二叠纪-三叠纪界线剖面，其地层出露完整，沉积连续，各类型化石丰富，是解决陆相生物地层划分对比，研究植物群演替、古环境变迁的关键地区。本项目拟通过对新疆北部地区二叠纪-三叠纪之交陆相地层中保存的植物印模化石、木化石及沉积环境进行古植物学和沉积学研究，分析植物群演变、植物化石中蕴藏的气候意义及沉积环境的改变，运用定性和定量的研究方法，识别该区在地质突变期的植物群与古环境变化，揭示地质关键期陆地植物与环境的协同演化关系。

The Permian-Triassic transition is an important period for the earth evolution. The mass extinction at the terminal Permian was the most severe biotic crisis in the earth history. Both marine and terrestrial ecosystem collapsed. The Permian-Triassic sections on the north flank of Junggar Basin and the south flank of Turpan-Hami Basin are well preserved with well-developed biomes, continuous strata and complete sequence, favorable for the study of the terrestrial stratigraphy and environmental changes. The present project aims to recognize the fossil plants and environmental changes during Permian-Triassic transition in the northern Xinjiang by using qualitative and quantitative methods to analyze the fossil plant impressions or compressions, fossil woods and sedimentary facies. The purpose of this study is to recognize the co-evolution of terrestrial plants and environment during the Paleozoic-Mesozoic transitional period.