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Biol Bull 98: 152-160. (April 1950)
© 1950 Marine Biological Laboratory
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RESPIRATION AND CELL DIVISION IN THE EGG OF URECHIS CAUPO

ERIK ZEUTHEN 1

1 Hopkins Marine Station, Stanford University, and Laboratory of Zoophysiology, University of Copenhagen

The first 3-4 mitotic divisions in the egg of the echiurid worm Urechis caupo were found to be accompanied by slight (2-3 per cent) increases in respiration. The phenomenon was found at all teinperatures at which normal development takes place (9-24° C.), and it was found with air as well as with oxygen in the diver. The respiration was low or beginni to rise duning prophase. It was maximum around metaphase-anaphase, lower during telophase when the cytoplasm divides.

In the discussion the experiments are considered in relation to previously recorded observations.






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Copyright © 1950 by the Marine Biological Laboratory.