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Free Content Some Effects of Photoperiod on the Motility Rhythm of Cultured Zooxanthellae

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Zooxanthellae (Symbiodinium microadriaticum) cultured from the sea anemone Aiptasia tagetes have a characteristic circadian motility pattern. Under both a 12:12 LD and constant darkness motile cells occurred only during the light period (0800–2000), reaching peak motility 4 h after dawn; non-motile vegetative cells were always present. The pattern was lost when cells were placed under continuous illumination, implying that some period of darkness is required for the expression of the motility rhythm. Scanning electron micrographs confirmed the transition between motile and non-motile cells under an alternating photoperiod.

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Document Type: Research Article

Publication date: 1984-05-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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