| The subcellular origin of bioluminescence in Noctiluca miliaris. | |
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MedLine Citation:
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PMID: 5340466 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The light emitted by Noctiluca has its origin in 1 to 5 x 10(4) organelles ("microsources") which are scattered throughout the perivacuolar cytoplasm, and which appear to be the elementary functional units of bioluminescence. Microscopical techniques, image intensification, and microphotometry were employed in their investigation. Microsources are fluorescent, strongly phase-retarding, and range widely in diameter below 1.5 microns. The number of quanta emitted in a flash from a microsource ("microflash") is of the order of 10(5) photons. However, microflashes show a wide range of intensities, which are correlated with the size of the organelles from which they arise. Each organelle responds repetitively and with reproducible time course to a succession of invading triggering potentials. Reversible changes in the intensity of the flash emitted by the whole cell ("macroflash") occur because of graduations in intensity of microflashes rather than as a result of changes in the number of responsive organelles. The shape of the flash emitted by individual microsources resembles that of the macroflash except for slightly shorter rise and decay times. It is concluded that the macroflash results from somewhat asynchronous, but otherwise parallel summation of microflashes. |
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Authors:
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R Eckert; G T Reynolds |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of general physiology Volume: 50 ISSN: 0022-1295 ISO Abbreviation: J. Gen. Physiol. Publication Date: 1967 May |
Date Detail:
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Created Date: 1967-10-07 Completed Date: 1967-10-07 Revised Date: 2010-09-10 |
Medline Journal Info:
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Nlm Unique ID: 2985110R Medline TA: J Gen Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1429-58 Citation Subset: IM |
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| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials Animals Cytoplasm Electrophysiology* Eukaryota / growth & development, physiology* Fluorescence* Luminescent Measurements* Microscopy, Phase-Contrast Organoids / physiology* Photomicrography |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
| Full Text | |
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Journal Information Journal ID (nlm-ta): J Gen Physiol ISSN: 0022-1295 ISSN: 1540-7748 Publisher: The Rockefeller University Press |
Article Information Download PDF  Copyright © 1967 by The Rockefeller University Press Received Day: 21 Month: 7 Year: 1966 Print publication date: Day: 1 Month: 5 Year: 1967 Volume: 50 Issue: 5 First Page: 1429 Last Page: 1458 ID: 2225713 PubMed Id: 5340466 |
| The Subcellular Origin of Bioluminescence in Noctiluca miliaris | |
| Roger Eckert | |
| George T. Reynolds | |
| From the Department of Zoology, Syracuse University, New York, the Marine Biological Laboratory, Woods Hole, Massachusetts, and the Palmer Physical Laboratory, Princeton University, New Jersey |
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