Chlamydomonas reinhardii (Volvocales) - Asexuelle Fortpflanzung

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Formal Metadata

Title
Chlamydomonas reinhardii (Volvocales) - Asexuelle Fortpflanzung
Alternative Title
Chlamydomonas reinhardii (Volvocales) - Asexual Reproduction
Author
License
CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
Identifiers
IWF Signature
E 1318
Publisher
Release Date
1972
Language
Silent film
Producer
IWF
Production Year
1967

Technical Metadata

IWF Technical Data
Film, 16 mm, 105 m ; SW, 9 1/2 min

Content Metadata

Subject Area
Abstract
Grünalge. Geißelbewegung und Fortbewegung der Zoosporen. Sporangienbildung: Einziehen der Geißel, Kernwanderung zum Geißelpol, Mitose mit Chromosomenbewegung, Verschwinden des Nukleolus, Verdoppelung der pulsierenden Vakuolen, Plasmateilung und Drehung der Tochterprotoplasten, Freisetzen der Zoosporen nach Zugabe eines sporangienwandlösenden Enzyms. Quellen der Gallerte in einem Tuschepräparat. Mit Zeitraffung.
The film shows various stages of the asexual propagation of the unicellular green alga Chlamydomonas reinhardi. It demonstrates the following details of the sporangia formation: retraction of the flagellae, movement of the nucleus to the flagella pole, mitosis and movement of the chromosomes, disappearance of the nucleolus during mitosis, doubling of the pulsating vacuoles, division of the protoplast, and rotation of the daughter protoplasts through the angle of 90° after the first division step. The liberation of the zoospores is experimentally triggered by a species-specific sporangium wall-dissolving enzyme. The zoospores are embedded inside the sporangium in a jelly, which swells during the course of the enzymatic sporangium wall dissolution. During this swelling the movement of the zoospore flagellae is initiated.
Keywords Algen / Grünalge Grünalge Chlamydomonas Zellteilung / Chlorophyceae Sporen / Chlorophyceae Mitose / Botanik Fortpflanzung, ungeschlechtliche / Chlorophyceae Enzyme enzymes reproduction, asexual / Chlorophyceae mitosis / botany spores / Chlorophyceae cell division / Chlorophyceae Chlamydomonas green algae algae / green algae

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