地衣是先锋生物，在岩石风化和土壤形成中具有重要作用，此外，它能产生独特的次生代谢产物，具有非常好的生物活性。认识地衣物种，对地衣进行分类学研究是地衣领域其他研究的基础。袋衣属隶属于真菌界，子囊菌门，茶渍纲，茶渍目，梅衣科，该属地衣在中国分布广泛，资源丰富，目前已报道43种，占世界该属总数的近43%。本项目拟围绕袋衣属种间的系统发育关系和袋衣属分类系统这两个科学问题，通过表型和多基因序列分析的方法，进行如下研究：（1）、调查中国袋衣属的物种多样性，查明物种数和分布，丰富我国地衣种类的记载资料；（2）、探讨袋衣属种间的系统发育关系，评估本属分类的表型性状，完善袋衣属的分类系统；（3）、分离培养中国袋衣属地衣共生菌藻，丰富中国地衣共生菌藻种质资源库，为地衣资源的开发利用奠定基础。

Being as pioneer, lichens are vital in soil processes and weathering of rocks, moreover, they can produce many unique metabolites, which have excellent bioactivities. Recognizing lichen species, that is, the taxonomy work of lichens, is the basis of all the other research work taking lichens as objects of study. Hypogymnia belongs to Parmeliaceae, Lecanorales, Lecanoromycetes, Ascomycota, Fungi, which distributes widely in China, and have abundant biological resource. Up to now, 43 species have been reported in China, accounting for almost 43% of this genus worldwide. This project will focus on the phylogentetic relationship among the species and the classification system of Hypogymnia, by phenotype and multi-gene DNA sequences analysis, the following contents will be studied: 1). to investigate the species diversity of Chinese Hypogymnia, clarify the species number and distribution,and enrich the recordation of Chinese lichen species; 2). to discuss the phylogenetic relationship among species, evaluate the phenotypic characters used in the taxonomy of Hypogymnia, and improve the current classification system; 3). to isolate the mycobiont and photobiont, enrich the Chinese lichen germplasm resource bank, and lay the foundation for the exploitation of lichen resource.