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Journal of Cell Science, Vol 11, 875-886, Copyright © 1972 by Company of Biologists

Submitted on May 14, 1971
Revised on May 22, 1972

Patterns of Particle Movement in Nerve Fibres In Vitro- an Analysis by Photokymography and Microscopy

M. BERLINROOD 1, S. M. McGEE-RUSSELL 1, and R. D. ALLEN 1

1 Department of Biological Sciences, State University of New York at Albany, Albany, New York 12203, U.S.A.

Tissue-cultured nerve fibres derived from 3 species of amphibian embryos were composed of bundles of neurites, when viewed by electron microscopy, and contained particles moving in both directions by saltations. Photokymographic analysis of ciné microscopy records taken with Zeiss differential interference optics demonstrated instantaneous particle velocities ranging from 0.15 to 1.8 µm 8-1 (13-155 mm/day) in Rana pipiens cultures; 0.16-0.8 µm s-1 (14-74 mm/day) in Ambystoma tigrinum cultures and 0.6-2.25 µm s-1 (45-194 mm/day) in Xenopus laevis cultures. Measured pathlengths for particles saltations ranged from 4 to 63 µm. No correlations between particle velocity and pathlength were found.

Submitted on May 14, 1971
Revised on May 22, 1972




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© The Company of Biologists Ltd 1972