spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Brokaw, C. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Brokaw, C. J.

Journal of Experimental Biology, Vol 71, Issue 1 229-240, Copyright © 1977 by Company of Biologists

JOURNAL ARTICLES

CO2-inhibition of the amplitude of bending of triton-demembranated sea urcin sperm flagella

CJ Brokaw

Demembranated sea urchin spermatozoa were reactivated in solutions containing KHCO3 and observed in a covered well slide. Although KHCO3 itself causes a small inhibition of flagellar beat frequency, the results confirm previous observations of a direct inhibition of flagellar bend angle by CO2 with no effect of CO2 on frequency. Observation of the effect of pH on the inhibition of bend angle in solutions containing KHCO3 indicates that a given concentration of OH- has a similar effect to the same concentration of HCO3-, as would be expected if CO2- inhibition results from reaction of CO2 with protein-NH3+ groups to form carbamates. CO2 may interfere with a control mechanism which selectively suppresses dynein cross-bridge activity in order to generate rhythmic bending. This control mechanism may incorporate a feedback control involving a measure of flagellar amplitude, which fails to operate successfully when the amplitude is reduced below a critical level.


This article has been cited by other articles:


Home page
 ReproductionHome page
J. Cosson, A.-L. Groison, M. Suquet, C. Fauvel, C. Dreanno, and R. Billard
Marine fish spermatozoa: racing ephemeral swimmers
Reproduction, September 1, 2008; 136(3): 277 - 294.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1977