Spatial and temporal transcellular current patterns during oogenesis

William Diehl-Jones, Erwin Huebner

    Research output: Contribution to journalJournal Articlepeer-review

    7 Citations (Scopus)

    Abstract

    We have used the two-dimensional vibrating probe to examine spatial and temporal patterns in the transcellular current flow around telotrophic ovarioles of the insect Rhodnius prolixus. We demonstrate a dynamic pattern of currents which correlates with various stages of vitellogenesis. Asymmetries exist in the radial current pattern around intact ovarioles, particularly around the terminal follicle, and may correlate with early developmental axes. The extracellular current pattern is largely reflected by a similar, though weaker pattern of currents over the germ cell membranes, indicating that both germ cell and somatic cell membranes are involved in current generation. Current enters previtellogenic oocytes and leaves oocytes entering vitellogenesis. We speculate that current reversal and loss of trophic cord contact may represent an electrophysiological feedback control mechanism during oogenesis.

    Original languageEnglish
    Pages (from-to)302-311
    Number of pages10
    JournalDevelopmental Biology
    Volume153
    Issue number2
    DOIs
    Publication statusPublished - Oct. 1992

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