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Indoleamine-induced encystment in dinoflagellates

Published online by Cambridge University Press:  11 May 2009

J.T.Y. Wong  and
Y.H. Wong
J.T.Y. Wong
Affiliation:
Marine Biological Association, The Laboratory, Citadel Hill, Plymouth, PL1 2PB.
Y.H. Wong
Affiliation:
Department of Biology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
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Abstract

Six species of dinoflagellates were investigated for their responsiveness to the indoleamine melatonin (and its homologue 5-methoxytryptamine), the vertebrate hormone for circadian rhythm regulation. Five species were observed forming pellicle cysts in response to 5-methoxytryptamine at concentrations around 10−6M. Cells of Oxyrrhis marina were observed retracting from the theca, part of the responsive pathway to indoleamine, but the resulting naked cells were unable to form a new cell wall and lysed.

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 74 , Issue 2 , May 1994 , pp. 467 - 469
Copyright
Copyright © Marine Biological Association of the United Kingdom 1994

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