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Cyclosis in Elodea

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Published on Mar 19, 2007

A new version of video is available here: https://youtu.be/Ybt2OOi7JLI

Rapid cycling of cytoplasm - cyclosis is seen here as circling of chloroplasts in cells of Elodea canadensis. Chloroplasts normally move in the cell to adapt to changing light conditions; here they are exposed to much too strong light (under the microscope) and they want to move away from it, but in the end they just circle round and round.

The microscope used is a high-end research microscope from Zeiss (Axioimager Z1). The movie was recorded with 40x objective and DIC (differential interference contrast) - helps with imaging non-stained specimens.

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