Phylogenetic analysis and genome size of Ostreococcus tauri (Chlorophyta, Prasinophyceae)

被引：62

作者：

Courties, C

Perasso, R

Chretiennot-Dinet, MJ

Gouy, M

Guillou, L

Troussellier, M

机构：

[1] UPMC, INSU, CNRS, Lab Modeles Biol Cellulaire & Evolut,OOB, F-66651 Banyuls sur Mer, France

[2] Univ Paris 11, Lab Biol Cellulaire 4, Fac Sci, F-91405 Orsay, France

[3] UPMC, INSU, CNRS, Lab Oceanog Biol,OOB, F-66651 Banyuls sur Mer, France

[4] Univ Lyon 1, Lab Biometrie Genet & Biol Populat, CNRS, UMR 5558, F-69622 Villeurbanne, France

[5] UPMC, INSU, CNRS, Biol Stn, F-29682 Roscoff, France

[6] Univ Montpellier 2, Lab Hydrobiol Marine, CNRS, UMR 5556, F-34095 Montpellier 5, France

来源：

JOURNAL OF PHYCOLOGY | 1998年 / 34卷 / 05期

关键词：

chromosome; eukaryote; genome size; molecular phylogeny; Ostreococcus; Prasionphyceae; 18S rDNA gene sequence;

D O I：

10.1046/j.1529-8817.1998.340844.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Ostreococcus tauri Courties et Chretiennot-Dinet is the smallest described autotrophic eukaryote dominating the phytoplanktonic assemblage of the marine Mediterranean Thau lagoon (France). Its taxonomic position was partly elucidated from ultrastructure and high-pressure liquid chromatography (HLPC) pigment analysis. The sequence analysis of the 18S rDNA gene of O. tauri measured here is available in EMBL Nucleotide Sequence Database (accession number: Y15814) and allowed to clarify its phylogenetic position. O. tauri belongs to the Prasinophyceae and appears very close to Mantoniella, a typical scaly Prasinophyceae, morphologically very different from the naked and coccoid Ostreococcus. An electrophoretic analysis of O. tauri shows that the nucleus contains 10.20 mbp. This small genome fragmented into 14 chromosomes ranging in size from 300 to 1500 kbp, confirms the minimalist characteristics of Ostreococcus tauri.

引用

页码：844 / 849

页数：6

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