弯枝藻目Compsopogonales系统分类研究进展

Review of Systematics of Compsopogonales( Rhodophyta)

弯枝藻目Compsopogonales是淡水红藻中一个比较重要的类群,主要特征是:藻体分枝丝状,有匍匐和直立丝体的分化,幼体单列细胞,成熟时单列轴细胞外有皮层细胞包被,一般以单孢子繁殖。本文综述了弯枝藻目系统分类、繁殖方式及我国该目植物区系分类的研究进展。目前,该目已报道过的分类单位有2科,4属,30多个种,但其系统分类方面仍存疑甚多。中国迄今已报道的该目植物只有6种。根据目前发展趋势,利用分子生物学手段对我国该目植物进行深入系统的、多特征的分类研究是今后的主要方向。

The order Compsopogonales is quite an importmant group of freshwater red algae. Currently,the main features of the order are considered： the thalli are filamentous with creepy and erect branches; young plants are unicellular,and with the cortical cells when they are mature; asxual reproduction is by monospores. In this paper,the progress in systematics,reproduction and taxa distributed in China of Compsopogonales is reviewed. Up to now,more than 30 species belonged to 4 genera,2 families of Comspogonales have been described all over the world and Six species of Compsopogonales were recorded in China. Some doubts on systematic of the order are pendent. It will be focused on the systematics based on multicharacteristics for Compsopogonales using molecular biological data. Furthermore,the phylogenetics will be researched and the molecular phylogenetic tree will be constructed about Compsopogonales in China.