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Journal of Cell Science, Vol 65, Issue 1 41-60, Copyright © 1984 by Company of Biologists

JOURNAL ARTICLES

Video digitizer analysis of birefringence along the lengths of single chromosomal spindle fibres. II. Crane-fly spermatocyte chromosomal spindle fibres are not temperature-labile

CJ Schaap and A Forer

Retardations were measured along the lengths of single chromosomal spindle fibres, from metaphase through anaphase, from video-taped images of crane-fly spermatocytes incubated at various temperatures (4-30 degrees C). These measurements were made using a video digitizer interfaced to a microcomputer. Over most of the range of temperatures at which normal anaphase movement occurs the chromosomal spindle fibres are not temperature-labile. The non-specific and continuous fibre birefringence is temperature-labile, however. The data are discussed with respect to the 'dynamic equilibrium' model of anaphase chromosome movement. We conclude that, since single chromosomal fibre birefringence is not temperature-labile over most of the range of temperatures at which normal anaphase chromosome movement occurs, these data do not support the dynamic equilibrium model of anaphase chromosome movement.




© The Company of Biologists Ltd 1984