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The Journal of General Physiology, Vol 54, 96-122, Copyright © 1969 by The Rockefeller University Press

ARTICLE

Stimulable and Spontaneous Bioluminescence in the Marine Dinoflagellates, Pyrodinium bahamense, Gonyaulax polyedra, and Pyrocystis lunula

W. H. Biggley 1, E. Swift 1, R. J. Buchanan 1, and H. H. Seliger 1

1 From the McCollum-Pratt Institute and the Department of Biology, and the Chesapeake Bay Institute, The Johns Hopkins University, Baltimore, Maryland 21218.

Dr. Swift's present address is Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881. Dr. Buchanan's present address is Department of Civil Engineering, University of Washington, Seattle, Washington 98105

P. bahamense, G. polyedra, and P. lunula exhibit interspecies differences in stimulable and spontaneous bioluminescence. For each species the total number of photons that can be emitted upon mechanical stimulation is a constant, regardless of the time during scotophase at which stimulation occurs. Ratios of stimulable bioluminescence per organism during scotophase and photophase are as high as 950:1 for laboratory cultures and have been observed as high as 4000: 1 for natural populations of P. bahamense. Spontaneous emission in darkness shows flashing as well as low-level continuous emission. Natural populations of P. bahamense, placed in darkness during natural photophase, exhibit a dual character to their stimulable bioluminescence. Mechanical stimulation techniques are described for rapid and reproducible stimulation of bioluminescence.

Submitted on August 20, 1968


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