摘要
网衣属隶属于网衣科,是网衣科的模式属,目前已知种有100多种,而国内对于网衣属系统研究较少,国内已报道的网衣属(Lecidea Ach.)为40种,1变种。由于该属分布广泛,使得该属在形态结构上变异程度较大,在其形态上与假网衣属(Porpidia Körb.)和小网衣属(Lecidella Körb.)极为相似,本文中初步探究三个属形态学及化学成分存在的差异,同时借助分子系统学研究手段,解决属之间进化距离关系。本论文选取NCBI数据库中分布于不同地区的Lecidea属7个种、Lecidella属5个种和Porpidia属5个种的ITS基因序列,利用最大似然法(ML)构建该三个属之间的系统发育关系。系统发育关系所显示的结果与传统形态学分类方法基本一致。
The genus Lecidea belongs to Lecideaceae, which is the typical genus of Lecideaceae, including ap-proximately 100 species in the genus. In China, systematic studies have been barely done on Le-cidea, and 40 species and 1 variation species have been reported. Because of the wide distributions of the genus Lecidea, its morphological structures have variations. Other crustose lichens that are superficially similar with a hand lens include species of Lecidella and Porpidia. In the paper, a preliminary study on morphology and chemical components was conducted between the three genera. Meanwhile, with the help of molecular phylogeny methods, the phylogenetic relationship about the genera were studied. The phylogeny of Lecidea, Lecidella and Porpidia species was studied, based on ITS sequences using ML analyses. Phylogenetic relationships among 17 individuals representing 7 Lecidea species, 5 Lecidella species and 5 Porpidia species, mainly from different countries around the world, were included in the analyses. Our phylogenetic analyses supported traditional genera delimitations based on morphological and chemical traits in most but not all cases.
出处
《植物学研究》
2018年第2期93-100,共8页
Botanical Research
基金
国家自然科学基金项目(31670023)。
