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Biol Bull 132: 222-228. (April 1967)
© 1967 Marine Biological Laboratory
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THE EFFECT OF LIGHT ON THE SPAWNING OF CIONA INTESTINALIS

CHARLES C. LAMBERT 1 and CHARLES L. BRANDT 1

1 Biology Department, San Diego State College, San Diego, California

1. The spawning of Ciona intestinalis with respect to light was studied, using both white light and monochromatic light.

2. A one-hour dark-adaption period followed by exposure to light resulted in spawning by 66.6% of the 884 animals tested.

3. Spawning occurs an average of 27.3 minutes after the onset of illumination.

4. Illumination need not be continuous until spawning occurs; the animals spawn when returned to the dark after a short illumination period, provided they have received enough energy.

5. The action spectrum for spawning suggests cytochrome c as a chromophore.




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Y Nakatani, R Moody, and W. Smith
Mutations affecting tail and notochord development in the ascidian Ciona savignyi
Development, January 8, 1999; 126(15): 3293 - 3301.
[Abstract] [PDF]


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Copyright © 1967 by the Marine Biological Laboratory.