A light and electron microscopical study on the resting cyst of the tintinnid Schmidingerella (Alveolata, Ciliophora) including a phylogeny-aware comparison

被引：5

作者：

Ganser, Maximilian H. ^{[1
]}

Bartel, Heidi ^{[1
]}

Weissenbacher, Birgit ^{[1
]}

Andosch, Ancuela ^{[2
]}

Luetz-Meindl, Ursula ^{[1
,2
]}

Radacher, Peter ^{[1
]}

Agatha, Sabine ^{[1
]}

机构：

[1] Paris Lodron Univ Salzburg, Dept Environm & Biodivers, Hellbrunnerstr 34, A-5020 Salzburg, Austria

[2] Paris Lodron Univ Salzburg, Dept Biosci & Med Biol, Hellbrunnerstr 34, A-5020 Salzburg, Austria

来源：

EUROPEAN JOURNAL OF PROTISTOLOGY | 2022年 / 86卷

基金：

奥地利科学基金会;

关键词：

Choreotrichida; Ciliate; Cyst wall; Electron energy loss spectroscopy; Electron spectroscopic imaging; Marine plankton; Ultrastructure; MESERES-CORLISSI CILIOPHORA; PLANKTONIC OLIGOTRICH CILIATE; ULTRASTRUCTURAL OBSERVATIONS; FINE-STRUCTURE; BASIC LIGHT; ENCYSTMENT; MORPHOLOGY; EXCYSTMENT; WALL; HYPOTRICHIDA;

D O I：

10.1016/j.ejop.2022.125922

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Resting cysts protect ciliates against adverse environmental conditions. The morphology and ultrastructure of resting cysts has been described in very few Oligotrichea, a group of mainly marine planktonic ciliates. The present study provides the first ultrastructural data for loricate choreotrichids, applying light and electron microscopy on the cysts of the tintinnid Schmidin-gerella meunieri (Kofoid and Campbell, 1929) Agatha and Struder-Kypke, 2012. The morphology of live cysts and the wall ultrastructure of cryofixed cysts were morphometrically analysed. The resting cyst is roughly flask-shaped, broadening to a slightly concave, laterally protruding anterior plate. An emergence pore closed by a skull cap-shaped papula is directed to the bottom of the lorica on the opposite side of the cyst. The cyst wall consists of an ectocyst, mesocyst, and endocyst dif-fering in thickness, structure, and nitrogen concentration as revealed by conventional transmission electron microscopy, elec-tron energy loss spectroscopy, and electron spectroscopic imaging. The cysts of S. meunieri belong to the kinetosome-resorbing type, which also occurs in the majority of hypotrich ciliates. Two main features (flask-shape and presence of an emergence pore) are shared with the closely related aloricate choreotrichids and oligotrichids, distinguishing the Oligotrichea from the hypotrich and the more distantly related euplotid ciliates.(c) 2022 The Author(s). Published by Elsevier GmbH. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

引用

页数：24

共 114 条

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