Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars)
Innocuous physiological stimuli which excite bioluminescence in Meganyctiphanes norvegica are few; one such is exposure to an appropriate light, another is chemical stimulation by 5-hydroxytryptamine. Meganyctiphanes responds to a photoflash, after some tens of seconds delay, with a bioluminescent g...
Published in: | Proceedings of the Royal Society of London. Series B. Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspb.1965.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1965.0044 |
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crroyalsociety:10.1098/rspb.1965.0044 2024-06-02T08:10:18+00:00 Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) 1965 http://dx.doi.org/10.1098/rspb.1965.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1965.0044 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society of London. Series B. Biological Sciences volume 162, issue 988, page 365-386 ISSN 0080-4649 2053-9193 journal-article 1965 crroyalsociety https://doi.org/10.1098/rspb.1965.0044 2024-05-07T14:16:55Z Innocuous physiological stimuli which excite bioluminescence in Meganyctiphanes norvegica are few; one such is exposure to an appropriate light, another is chemical stimulation by 5-hydroxytryptamine. Meganyctiphanes responds to a photoflash, after some tens of seconds delay, with a bioluminescent glow lasting a few minutes. A second flash stimulus applied during this luminescent response rapidly abolishes it for tens of seconds, after which the glow returns again at full strength. Weak light of about the same colour and intensity as the animal’s own luminescence also depresses the flash-excited glow for the whole time the ambient light is present. 5-hydroxytryptamine (5- HT ), added to the sea water in which the animal swims can either excite continual luminescence or set whatever physiological controls exist into some hyper-sensitive state so that Meganyctiphanes becomes much more responsive to optical stimulation. The delay of onset, duration, amplitude and time course of flash-excited luminescence have been determined quantitatively, together with their dependence upon the intensity and spectral composition of the stimulating flash. Some characteristics of the inhibition by flash and by weak continuous light have been recorded, and also the interaction of 5- HT sensitization upon light excitation and inhibition. These optical stimulus-bioluminescent response relationships establish a well-documented excitatory stimulus which can be used to initiate luminescence at will, leaving the animal in its natural physio-chemical environment. The observations provide an experimental basis for judging some hitherto weakly based speculations about the physiological control of bioluminescence in Meganyctiphanes and suggest sensible ways to investigate this in greater detail. Article in Journal/Newspaper Meganyctiphanes norvegica The Royal Society Proceedings of the Royal Society of London. Series B. Biological Sciences 162 988 365 386 |
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English |
description |
Innocuous physiological stimuli which excite bioluminescence in Meganyctiphanes norvegica are few; one such is exposure to an appropriate light, another is chemical stimulation by 5-hydroxytryptamine. Meganyctiphanes responds to a photoflash, after some tens of seconds delay, with a bioluminescent glow lasting a few minutes. A second flash stimulus applied during this luminescent response rapidly abolishes it for tens of seconds, after which the glow returns again at full strength. Weak light of about the same colour and intensity as the animal’s own luminescence also depresses the flash-excited glow for the whole time the ambient light is present. 5-hydroxytryptamine (5- HT ), added to the sea water in which the animal swims can either excite continual luminescence or set whatever physiological controls exist into some hyper-sensitive state so that Meganyctiphanes becomes much more responsive to optical stimulation. The delay of onset, duration, amplitude and time course of flash-excited luminescence have been determined quantitatively, together with their dependence upon the intensity and spectral composition of the stimulating flash. Some characteristics of the inhibition by flash and by weak continuous light have been recorded, and also the interaction of 5- HT sensitization upon light excitation and inhibition. These optical stimulus-bioluminescent response relationships establish a well-documented excitatory stimulus which can be used to initiate luminescence at will, leaving the animal in its natural physio-chemical environment. The observations provide an experimental basis for judging some hitherto weakly based speculations about the physiological control of bioluminescence in Meganyctiphanes and suggest sensible ways to investigate this in greater detail. |
format |
Article in Journal/Newspaper |
title |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
spellingShingle |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
title_short |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
title_full |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
title_fullStr |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
title_full_unstemmed |
Light-stimulated and light-inhibited bioluminescence of the euphausiid Meganyctiphanes norvegica (G. O. Sars) |
title_sort |
light-stimulated and light-inhibited bioluminescence of the euphausiid meganyctiphanes norvegica (g. o. sars) |
publisher |
The Royal Society |
publishDate |
1965 |
url |
http://dx.doi.org/10.1098/rspb.1965.0044 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1965.0044 |
genre |
Meganyctiphanes norvegica |
genre_facet |
Meganyctiphanes norvegica |
op_source |
Proceedings of the Royal Society of London. Series B. Biological Sciences volume 162, issue 988, page 365-386 ISSN 0080-4649 2053-9193 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.1965.0044 |
container_title |
Proceedings of the Royal Society of London. Series B. Biological Sciences |
container_volume |
162 |
container_issue |
988 |
container_start_page |
365 |
op_container_end_page |
386 |
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1800756140965888000 |