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海产绿藻束生刚毛藻(Cladophora fascicularis)的分类地位探讨
邓绍阳, 丁兰平, 黄冰心, 朱芮佳
天津师范大学生命科学学院 天津市动植物抗性重点实验室 天津 300387
摘要:
针对国际上海洋绿藻束生刚毛藻Cladophora fascicularisC.vagabunda的同物异名争议,本文对采集于海南岛莺歌海的束生刚毛藻进行了形态学观察。从55个样品的形态特征观测及分析中获得了用于其物种鉴定的主要特征为:藻体丛生,黄绿色,往往纠缠在一起,高3—23cm;基部为不规则分枝的假根状,往往多个植株的假根粘连在一起;直立部分叉状或多不规则叉状分枝,主枝可产生多个分枝或产生分级的分枝;上部枝多个密集成束,偏生于一侧,末位小枝侧生,多向内侧弯曲,略呈栉状排列,枝端钝尖;主轴细胞长宽比为3—6.5,侧枝细胞长宽比为3—5,小枝细胞长宽比为1.5—5,末位细胞长宽比为1.2—5。结合形态特征比较以及分子数据分析,本文探讨了束生刚毛藻与C.vagabunda的同物异名问题,认为束生刚毛藻可作为独立种存在。
关键词:  海藻  绿藻门  刚毛藻属  分类
DOI:10.11693/hyhz20181000252
分类号:Q949.21;Q944
基金项目:国家自然科学基金面上项目,31670199号;天津市教委科研计划项目,JW1705号;天津师范大学引进人才基金项目(自然科学2016);天津市高校“学科领军人才培养计划”项目(2017)。
THE TAXONOMICAL POSITION ON MARINE GREEN ALGAL CLADOPHORA FASCICULARIS
DENG Shao-Yang, DING Lan-Ping, HUANG Bing-Xin, ZHU Rui-Jia
Collage of Life Sciences, Tianjin Normal University, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin 300387, China
Abstract:
At present, it is disputed between Cladophora fascicularis and C. vagabunda worldwide. The morphological characteristics were observed by the collected samples of marine green alga C. fascicularis from Yinggehai sea, Hainan Island, China. Its main characteristics were combinated under the observation and analysis to 55 samples as follows:thalli clumped, yellow green, often entangled together, 3-23cm high; the base with irregularly branched rhizoid, the rhizoids of several plants often stick together; the erect part forked or irregularly forked branching, main branch with many branches or ranked branches; the upper branches densely bunched, secund, terminal branchlets lateral and mostly curved inwards, slightly pectinate arranged with blunt point at the end; the cells of main axes, lateral branches, branchlets and terminate of branchlets with length/width 3-6.5, 3-5, 1.5-5 and 1.2-5, respectively. Based on the combination results between the comparison of morphological characteristics and analysis of molecular data, it proposes that that C. fascicularis is not synonym of C. vagabunda and can be as distinct species.
Key words:  marine algae  Chlorophyta  Cladophora  taxonomy
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