塞舌尔角毛藻的形态学再描述和分子系统学分析

doi:10.11978/2020066

Abstract

Abstract:

Chaetoceros seychellarus, which belongs to subgenus Phaeoceros of genus Chaetoceros in Bacillariophyta, is a rare species in the world. Present knowledge on the morphology is incomplete, because studies are mainly conducted under LM (light microscope) and lack ultrastructural characteristics under EM (electron microscope). Its systematic information is still unknown. In this study, monoclonal strains of C. seychellarus were established from coastal waters in the southeast China. The morphology was observed using LM and SEM (scanning electron microscope). D1-D3 regions of the large subunit ribosomal DNA (LSU) were amplified to construct the phylogenetic relationship. The key features were straight chains, rectangular apertures and two rimoportulae on each valve that distributed symmetrically along the transapical axis. The phylogenetic tree showed C. seychellarus was a sister to C. danicus. On LSU tree, the section Borealia established based on morphology solely was paraphyletic, which needs revision in further.

Key words: Chaetoceros seychellarus, morphology, phylogeny, section Borealia

CLC Number:

P735.531

NIU Biaobiao, ZHAI Mengyi, LI Yang. Morphological and Phylogenetic Studies on Chaetoceros seychellarus[J].Journal of Tropical Oceanography, 2021, 40(4): 44-49.

Figures/Tables 3

References 19

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株系编号	采样海域	采样时间
MC2034	台湾海峡(117°48'36"E, 22°42'38"N)	2016年4月2日
MC2054	台湾海峡(117°48'36"E, 22°42'38"N)	2016年4月2日
MC2066	台湾海峡(120°20'24"E, 25°33'00"N)	2016年4月8日
MC2083	三亚海域(111°54'00"E, 19°45'94"N)	2017年4月7日
MC2090	三亚海域(111°54'00"E, 19°45'94"N)	2017年4月7日

Morphological and Phylogenetic Studies on Chaetoceros seychellarus

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