Food ingestion in Pseudomicrothorax
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| License | No Open Access License: German copyright law applies. This film may be used for your own use but it may not be distributed via the internet or passed on to external parties. | |
| Identifiers | 10.3203/IWF/C-12776eng (DOI) | |
| IWF Signature | C 12776 | |
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| Production Year | 2001 |
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| IWF Technical Data | Video-Clip ; F, 1 min 37 sec |
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Transcript: English(auto-generated)
00:05
The ciliate Pseudomicrothorax feeds on blue algae. Here, a cell is just beginning to ingest food. The algae are taken up relatively quickly into the ciliate, which must rapidly form an extensive feeding vacuole.
00:24
This requires the allocation of a considerable amount of membrane material in a short time. After ingestion into the food vacuole, the alga filament loses its stiffness. It is being enzymatically digested.
00:41
Enzymes, as well as membrane material, are transported in a current of tiny vesicles towards the point of ingestion. As soon as the ciliate encounters a suitable blue alga, the vesicle current starts.
01:03
These vesicles then release digestive enzymes, which soon digest the cell wall of the alga. Simultaneously, the membrane fuses with the food vacuole, which then becomes bigger. If the vesicle supply stops, then food ingestion is interrupted.