卵囊藻科（绿藻门）的系统发育位置

PHYLOGENETIC POSITION OF THE OOCYSTACEAE (CHLOROPHYTA).

作者信息

Hepperle Dominik, Hegewald Eberhard, Krienitz Lothar

机构信息

Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, D-16775 Neuglobsow, GermanyInstitute of Chemistry and Dynamics of the Geosphere, Research Centre Jülich, D-52425 Jülich, GermanyInstitute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, D-16775 Neuglobsow, Germany.

出版信息

J Phycol. 2000 Jun;36(3):590-595. doi: 10.1046/j.1529-8817.2000.99184.x. Epub 2001 Dec 25.

DOI:10.1046/j.1529-8817.2000.99184.x

PMID:29544006

Abstract

The complete 18S rRNA gene sequences of three Oocystis A. Braun species (Oocystaceae) and three other chlorococcal algae, Tetrachlorella alternans (G. M. Smith) Korš. (Scenedesmaceae), Makinoella tosaensis Okada (Scenedesmaceae), and Amphikrikos cf. nanus (Fott & Heynig) Hind. (Chlorellaceae) were determined and subjected to four different phylogenetic analysis algorithms. Independent of the reconstruction method, these taxa clustered together as a monophyletic group (Oocystaceae) within the Trebouxiophyceae. This result was supported by high bootstrap values. A comparison of morphological data with the phylogenetic reconstructions indicated that the evolution of Oocystaceae was accompanied by a reduction in the number of plastids. This study fully supports the taxonomic assignment of the Oocystaceae as a distinct family. The diacritic criterion that the cell walls are composed of several cellulose layers with perpendicular fibril orientations is in accordance with the molecular data.

摘要

测定了三种卵形藻属（Oocystis A. Braun）物种（卵形藻科）以及另外三种绿球藻纲藻类的完整18S rRNA基因序列，这三种绿球藻纲藻类分别是交替四小球藻（Tetrachlorella alternans (G. M. Smith) Korš.，栅藻科）、土佐牧野藻（Makinoella tosaensis Okada，栅藻科）以及近南两栖小球藻（Amphikrikos cf. nanus (Fott & Heynig) Hind.，小球藻科），并对其进行了四种不同的系统发育分析算法。无论采用何种重建方法，这些分类单元都聚在一起，形成了真球藻纲内的一个单系类群（卵形藻科）。这一结果得到了较高自展值的支持。形态学数据与系统发育重建结果的比较表明，卵形藻科的进化伴随着质体数量的减少。本研究充分支持将卵形藻科作为一个独特科的分类归属。细胞壁由几层具有垂直纤维取向的纤维素层组成这一判别标准与分子数据相符。