地衣是藻菌共生体，是漫长演化过程中所形成的一类具有稳定遗传特征的微型生态系统。担子地衣是由担子菌与共生藻互惠共生而形成的一类特殊地衣类群，由于担子地衣生长速度明显快于子囊地衣，对担子地衣的研究将有助于探索共生菌与共生藻分离培养、筛选具生物活性的成分有广泛的应用前景。中国地域辽阔，地衣物种资源丰富，但对担子地衣的研究匮乏，特别对其形态学与系统学相结合的研究仍属空白，使中国的担子地衣物种界限不清，属种间的亲缘关系不明，制约了其它相关领域的深入研究。项目通过对模式标本的借阅、形态特征的研究、地衣特征化合物鉴定，结合rDNA特征片段分析，在表基结合的研究基础上，界定中国担子地衣物种的分类界限，澄清物种组成，探讨属种间的亲缘关系，客观反映中国担子地衣的多样性及独特性，对揭示中国地衣的区系组成具有重要意义，同时也为担子菌与共生藻的形成机制和两者间的协同进化等相关领域研究奠定前期基础。

Lichen is a symbiotic of fungi and algae, a micro-ecosystem with stable heredity developed through the long evolution, basidiolichen is a special group formed by the basidiomycete fungi and algae through symbiosis. Basidiolichen grows faster than asco-lichens, study on this lichen group would be beneficial to the research on artificial culture of symbiotic fungi and algae, which aims at gaining bio-active compounds...China has a wide range of geographical region, it is one of places in the world holding the highest lichen diversity, but the study of basidiolichens is still poor, especially on morpho-based phylogeny, no study has ever been done, making basidiolichens species unclear, and phylogenetic relationship between genera and species confusing. Due to the lack of study, related research could not be carried out. ..This project focuses on this special lichen group, base on checking type specimens, traditional morphological study, identifying chemical compounds, combining modern molecular technology (rDNA analysis), aim at study this special lichen group with morpho-based phylogeny, to clarify the boundary and compositoin of basidio-lichen species, discuss phylogenetic relationship within genus and species, reflect the diversity and uniquness of Chinese basidio-lichen group.This study would be meaningful to the floristic study of lichens in China. Meanwhile, it supplies basic information on lichen formation mechanism, coevolution of fungi and algae, and other related research.