Stephanopyxis turris (Centrales) - Ungeschlechtliche Fortpflanzung durch Dauersporen

Video in TIB AV-Portal: Stephanopyxis turris (Centrales) - Ungeschlechtliche Fortpflanzung durch Dauersporen

Formal Metadata

Stephanopyxis turris (Centrales) - Ungeschlechtliche Fortpflanzung durch Dauersporen
Alternative Title
Stephanopyxis turris (Centrales) - Asexual Reproduction by the Formation of Perennial Spores
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IWF Signature
E 1342
Release Date
Silent film
IWF (Göttingen)
Production Year

Technical Metadata

IWF Technical Data
Film, 16 mm, 94 m ; SW, 8 1/2 min

Content Metadata

Subject Area
Kieselalge. Kettenförmige Kolonien; Bildung von Dauersporen: erste Differenzierungsteilung (äqual), zweite Differenzierungsteilung (extrem inäqual, Polarisierung des Zellinhalts infolge des Streckungswachstums), Keimung der Dauersporen. Mit Zeitraffung.
Stephanopyxis is capable of interrupting its vegetative reproduction by the formation of resting spores. The resting spores are formed in pairs via two differentiating cell divisions. The first division is equal, the second, however, extremely unequal, since during growth in the longitudinal direction the cell contents are polarized. Resting spores germinate by beginning with normal vegetative cell divisions. The walls of the spores are not shed but passed along from division to division.
Keywords Algen / Kieselalge Kieselalge Stephanopyxis turris Zellteilung / Chrysophyceae Fortpflanzung, ungeschlechtliche / Chrysophyceae reproduction, asexual / Chrysophyceae cell division / Chrysophyceae Stephanopyxis turris diatom algae Encyclopaedia Cinematographica
IWF Classification Biologie Algen Entwicklungszyklen Botanik botany developmental cycles algae biology