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Indoleamine-induced encystment in dinoflagellates

Published online by Cambridge University Press:  11 May 2009

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.

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
Copyright
Copyright © Marine Biological Association of the United Kingdom 1994

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