Lotharella polymorpha sp. nov. (Chlorarachniophyta) from the coast of Portugal
Lotharella polymorpha sp. nov. (Chlorarachniophyta) from the coast of Portugal
复制标题
Lotharella polymorpha sp。
DOI：
10.2216/i0031-8884-42-6-582.1
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发表时间：
2003
期刊：
影响因子：
1.6
通讯作者：
R. Schnetter
中科院分区：
文献类型：
--
作者：
Cornelia Dietz;K. Ehlers;C. Wilhelm;M. Gil;R. Schnetter
1998年7月，从葡萄牙阿尔布费拉的S·拉斐尔采集的海洋沉积物样品中分离到多形链霉菌。叶绿纲植物藻类的典型特征是：含有叶绿素a、b和叶黄素的叶绿体，在围绕叶绿体的外膜和内膜之间存在核形态，以及单鞭毛游动孢子。在多形乳杆菌中，核形态位于果核底部旁边的胞质周室内。类蛋白核被内对叶绿体膜分成两半。核型的位置和蛋白核的结构表明该新分离物属于Lotharella属。在固着细胞的形态和亚细胞水平上，多形链球藻不同于其他种类的变形藻和球藻。球囊原虫缺乏阿米巴期和分节原虫，而多形乳杆菌则形成具有两种不同形状的固着壁阿米巴的分节原虫。球状细胞、迁徙的阿米巴、类日虫细胞和游动孢子也会出现。未检测到变形虫的星状变形体细胞。多形拟果核没有柄，顶端的小泡充满无定形物质。固着阿米巴有一个厚的，致密的，电子致密的细胞壁和孔洞。由于这些特殊的特性，我们描述了在大西洋中发现的第一个Lotharella分离物为一新种--多态Lotharella。
Abstract Lotharella polymorpha was isolated from a sample of marine sediment collected at São Rafael, Albufeira, Portugal, in July 1998. Typical characteristics of a chlorarachniophyte alga are: chloroplasts containing chlorophylls a and b and lutein, the presence of a nucleomorph between the outer and inner pair of membranes surrounding the chloroplasts, and uniflagellate zoospores. In L. polymorpha, the nucleomorph is located in a periplastidial compartment beside the base of the pyrenoid. The pyrenoid is divided into two halves by the inner pair of chloroplast membranes. The position of the nucleomorph and the structure of the pyrenoid indicate that the new isolate belongs to the genus Lotharella. Lotharella polymorpha differs from the other species L. amoeboformis and L. globosa in the shape of the sessile cells and at the subcellular level. While amoeboid stages and meroplasmodia are lacking in L. globosa, L. polymorpha forms a meroplasmodium with two differently shaped types of sessile walled amoebae. Coccoid cells, migrating amoebae, heliozoan-like cells and zoospores also occur. Stellate amoeboid cells, as described for L. amoeboformis, were not detected. The pyrenoids of L. polymorpha have no stalks and their capping vesicles are filled with an amorphous substance. Sessile amoebae have a thick, compact, and electron-dense cell wall with pores. Because of these specific characteristics, we describe the first isolate of Lotharella found in the Atlantic Ocean as a new species, L. polymorpha.
在高pH值中使用柠檬酸铅作为电子显微镜中的电子斑点。
影响因子：
7.8
作者：
REYNOLDS, E S
通讯作者：
REYNOLDS, E S