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Science 15 April 1994:
Vol. 264. no. 5157, pp. 426 - 430
DOI: 10.1126/science.8153631
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Articles

Science, Vol 264, Issue 5157, 426-430
Copyright © 1994 by American Association for the Advancement of Science

articles

A dual embryonic origin for vertebrate mechanoreceptors

A Collazo, SE Fraser, and PM Mabee

Division of Biology, Beckman Institute, California Institute of Technology, Pasadena 91125.

Neuromasts, the mechanoreceptors of the lateral line system of fishes and aquatic amphibians, have previously been thought to develop exclusively from embryonic epidermal placodes. Use of fate mapping techniques shows that neuromasts of the head and body of zebrafish, Siamese fighting fish, and Xenopus are also derived from neural crest. Neural crest migrates away from the neural tube in developing vertebrates to form much of the peripheral nervous system, pigment cells, and skeletal elements of the head. The data presented here demonstrate that neuromasts are derived from both neural crest and epidermal placodes.


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