茨藻属的分类—细胞学、同工酶和扫描电镜观察证据的综合分析

茨藻属的分类—细胞学、同工酶和扫描电镜观察证据的综合分析 TAXONOMY OF NAJAS: A SYNTHETICAL ANALYSIS WITH EVIDENCES ON CYTOLOGY, ISOZYMES AND SEM EXAMINATION 游浚 You Jun Sun Xiangzhong and Wang Huiqin first-author 孙祥钟 王徽勤 得到草茨藻、小茨藻和澳古茨藻三个种的新的染色体数目,分别为2n=36,24和60。核型特征及外种皮细胞壁上构造,可望作为茨藻属植物分类的新证据;各类群的同工酶酶谱亦有这种可能性。日本茨藻、草茨藻、小茨藻和澳古茨藻等四个种的关系密切,并可能通过小茨藻而联系,推测小茨藻在茨藻属类群进化的一定阶段具关键作用。 2n=36 for Najas graminea, 2n=24 for N. minor and 2n=60 for N. oguraensis were first reported. The karyotype and the exact structures of the testa cell wall were probably used as some new evidances of taxonomy for Najas, and so were isozymes of peroxidase and cytochroms, but it must be careful to make them use. Four of these species （N. gracillima, N. graminea, N. minor and N. oguraensis） could be closely connected. but relation of N. foveolata and N. marina with above four species is not clear. It would be conjectured that N. minor was in a improtant position in evolution of Najas at some stage. 1985-04-01 2021-04-01 4