海产绿藻束生刚毛藻(Cladophora fascicularis)的分类地位探讨
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摘要
针对国际上海洋绿藻束生刚毛藻Cladophorafascicularis与C.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。
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—23 cm 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.
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—23 cm 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.
引文
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Tseng C K,1983.Common Seaweeds of China.Beijing:Science Press
Van Den Hoek C,1963.Revision of the European Species of Cladophora.Leiden,Netherlands:Doctor Dissertation of University of Leiden
Van Den Hoek C,1982.A Taxonomic Revision of the American Species of Cladophora(Chlorophyceae)in the North Atlantic Ocean and their Geographic Distribution.Amsterdam:North-Holland Publishing Company
Van Den Hoek C,Chihara M,2000.A Taxonomic Revision of the Marine Species of Cladophora(Chlorophyta)Along the Coasts of Japan and the Russian Far-east.Tokyo:National Science Museum
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Yoshida T,1998.New Descriptions of Japanese Algae.Tokyo:Uchida Rokakuho(in Japanese)
代岳,丁兰平,黄冰心等,2017.海产刚毛藻科的形态分类与分子系统发育学研究进展.广西科学,24(4):419-426
滕林宏,2011.中国刚毛藻目海藻的形态及系统发育学研究--兼DNA条形码技术在刚毛藻目的应用初探.北京:中国科学院海洋研究所硕士学位论文
Cotton A D,1915.Some Chinese marine algae.Bulletin of Miscellaneous Information,1915(3):107-113
Guiry M D,2018.AlgaeBase is a global algal database of taxonomic,nomenclatural and distributional information.http://www.algaebase.org
Hayakawa Y I,Ogawa T,Yoshikawa S et al,2012.Genetic and ecophysiological diversity of Cladophora(Cladophorales,Ulvophyceae)in various salinity regimes.Phycological Research,60(2):86-97
Kützing F T,1843.Phycologia generalis oder Anatomie,Physiologie und Systemkunde der Tange.Leipzig:F.A.Brockhaus
Leliaert F,Rousseau F,De Reviers B et al,2003.Phylogeny of the Cladophorophyceae(Chlorophyta)inferred from partial LSU rRNA gene sequences:is the recognition of a separate order Siphonocladales justified?European Journal of Phycology,38(3):233-246
Pochon X,Atalah J,Wood S A et al,2015.Cladophora ruchingeri(C.Agardh)Kützing,1845(Cladophorales,Chlorophyta):a new biofouling pest of green-lipped mussel Perna canaliculus(Gmelin,1791)farms in New Zealand.Aquatic Invasions,10(2):123-133
Sakai Y,1964.Scientific papers of the institute of algological research.Hokkaido:Hokkaido Imperial University
Taylor R L,Bailey J C,Freshwater D W,2017.Systematics of Cladophora spp.(Chlorophyta)from north Carolina,USA,based upon morphology and DNA sequence data with a description of Cladophora subtilissima sp.Nov.Journal of Phycology,53(3):541-556
Tseng C K,1983.Common Seaweeds of China.Beijing:Science Press
Van Den Hoek C,1963.Revision of the European Species of Cladophora.Leiden,Netherlands:Doctor Dissertation of University of Leiden
Van Den Hoek C,1982.A Taxonomic Revision of the American Species of Cladophora(Chlorophyceae)in the North Atlantic Ocean and their Geographic Distribution.Amsterdam:North-Holland Publishing Company
Van Den Hoek C,Chihara M,2000.A Taxonomic Revision of the Marine Species of Cladophora(Chlorophyta)Along the Coasts of Japan and the Russian Far-east.Tokyo:National Science Museum
Warming E,1884.Haandbog i den Systematiske Botanik:Naermest Til Brug for Laerere Og Universitets-Studerende.Kj?benhavn:P.G.Philipsens
Yoshida T,1998.New Descriptions of Japanese Algae.Tokyo:Uchida Rokakuho(in Japanese)