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Chaetoceros teres (Centrales) - Ungeschlechtliche Fortpflanzung, Zellteilung, Dauersporen

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Formal Metadata

Title Chaetoceros teres (Centrales) - Ungeschlechtliche Fortpflanzung, Zellteilung, Dauersporen
Alternative Title Chaetoceros teres (Centrales) - Asexual Reproduction, Cell Division, Perennial Spores
Author Drebes, Gerhard
License CC Attribution - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.3203/IWF/E-2011
IWF Signature E 2011
Publisher IWF (Göttingen)
Release Date 1975
Language Silent film
Producer Institut für den Wissenschaftlichen Film (IWF)
Production Year 1971

Content Metadata

Subject Area Life Sciences
Abstract Kieselalge. Zusammenhalten der linearen Zellketten durch Borsten, vegetative Vermehrung durch Zellteilung, Kolonieteilung nach Bildung besonderer Trennschalen mit Endborsten, Bildung von Dauersporen durch sukzessive Abscheidung zweier Sporenvalven, Bildung der vegetativen Valven mit Endborsten. Mit Zeitraffung.
The centric planktonic diatom Chaetoceros teres produces linear chains of cells held together by lateral bristles. Vegetative multiplication follows by bipartion of the cells. After cell division the bristles grow out from the apices of the new valves. The bristles cross each other in pairs and fuse inseparably at their crossing points. Colony division happens, if special separating valves with terminal bristles are formed after cell division. Resting spores develop endogenously by successive secretion of two spore valves. The spore valves are formed acytokinetically (rudimentary cell divisions). At germination the spore valves are shedded and likewise acytokinetically substituted by vegetative valves with terminal bristles, giving rise to a one-celled colony. A two-celled colony develops, if during germination a normal cell division is intervening.
Keywords Algen / Kieselalge
Kieselalge
Chaetoceros teres
Zellteilung / Chrysophyceae
Fortpflanzung, ungeschlechtliche / Chrysophyceae
Dauerspore
perennial spore
reproduction, asexual / Chrysophyceae
Chaetoceros teres
cell division / Chrysophyceae
diatom

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AV-Portal 3.8.0 (dec2fe8b0ce2e718d55d6f23ab68f0b2424a1f3f)