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 Bohrmann, J.
Right arrow Articles by Gutzeit, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Bohrmann, J.
Right arrow Articles by Gutzeit, H.

Journal of Cell Science, Vol 81, Issue 1 189-206, Copyright © 1986 by Company of Biologists

JOURNAL ARTICLES

The extracellular electrical current pattern and its variability in vitellogenic Drosophila follicles

J Bohrmann, A Dorn, K Sander and H Gutzeit

We determined the extracellular electrical current pattern around Drosophila follicles at different developmental stages (7-14) with a vibrating probe. At most stages a characteristic pattern can be recognized: current leaves near the oocyte end of the follicle and enters at the nurse cells. Only at late vitellogenic stages was an inward-directed current located at the posterior pole of many follicles. Most striking was the observed heterogeneity both in current pattern and in current density between follicles of the same stage. Different media (changed osmolarity or pH, addition of cytoskeletal inhibitors or juvenile hormone) were tested for their effects on extrafollicular currents. The current density was consistently influenced by the osmolarity of the medium but not by the other parameters tested. Denuded nurse cells (follicular epithelium locally stripped off) show current influx, while an accidentally denuded oocyte produced no current. Our results show that individual follicles may be electrophysiologically different, though their uniform differentiation during vitellogenesis does not reflect such heterogeneity.


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
C. S. Bjornsson and E. Huebner
Extracellular H+ dynamics during oogenesis in Rhodnius prolixus ovarioles
J. Exp. Biol., July 15, 2004; 207(16): 2835 - 2844.
[Abstract] [Full Text] [PDF]

Home page
 J. Cell Sci.Home page
J Bohrmann and K Biber
Cytoskeleton-dependent transport of cytoplasmic particles in previtellogenic to mid-vitellogenic ovarian follicles of Drosophila: time-lapse analysis using video-enhanced contrast microscopy
J. Cell Sci., January 4, 1994; 107(4): 849 - 858.
[Abstract] [PDF]


© The Company of Biologists Ltd 1986