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Journal of Cell Science, Vol 43, Issue 1 195-207, Copyright © 1980 by Company of Biologists

JOURNAL ARTICLES

Physiological requirements for ciliary reactivation of bracken fern spermatozoids

SM Wolniak and WZ Cande

Physiological parameters affecting reactivated ciliary beat in spermatozoids of braken fern (Pteridium aquilinum) were studied using a Triton/glycerol permeabilized cell model system. Reactivation frequencies of polylysine-tethered cells equalled in vivo rates at neutral pH. Frequency was dependent on ATP and Mg2+ concentration, and reactivation was inhibited by millimolar or greater free calcium. Reactivation was reversibly inhibited by micromolar concentrations of sodium ortho-vanadate, while intact cells were not affected by millimolar levels of the inhibitor. This is the first characterization of in vitro ciliary beat in a non-algal plant cell and demonstrates that the nucleotide and ionic requirements for reactivation of bracken cilia are similar to those of other systems.


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© The Company of Biologists Ltd 1980