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Cyst geometry in the egg chambers of Calliphora erythrocephala Mg. (Diptera: Calliphoridae) ovaries

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Abstract

In the germarium of polytrophic ovarioles of Calliphora erythrocephala (Mg.) fly, four mitotic divisions of cystoblasts give rise to 16-cell germ-line cysts. One cell differentiates into an oocyte, while the remaining 15 cells become nurse cells. Concomitantly actin-rich ring canals are formed at the intercellular junctions. The present study considers a mutual arrangement of the ring canals formed after the second to fourth mitoses relative to the ring canal formed after the first mitotic division in different regions of the germarium and egg chambers. During the cyst formation and its movement to the posterior end of the germarium, the ring canals are displaced relative to one another, thereby giving different branching variants of the cyst. The pattern of cell interconnections becomes stable in germarium region 2b and does not change during the cyst movement along the ovariole despite the cyst polarizes and increases in size.

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Acknowledgments

We are grateful to Gleb Artemov for constructive discussion, critical reading, and suggestions on the manuscript. The work was supported by the Russian Foundation for Basic Research (grant no. 10-04-01059-а), partially supported by the President of Russian Federation scholarship (SP-1037.2013.4) and the Targeted Federal Grant (no. 14.B37.21.0114).

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The authors declare no conflict of interest.

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Authors and Affiliations

  1. Scientific Research Institute of Biology and Biophysics Tomsk State University, 36 Lenin Prospekt, Tomsk, 634050, Russia

    Tatjana V. Anan’ina, Alina A. Kokhanenko & Vladimir N. Stegniy

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  1. Tatjana V. Anan’ina
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  2. Alina A. Kokhanenko
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  3. Vladimir N. Stegniy
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Correspondence to Tatjana V. Anan’ina.

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Handling Editor: Pavel Dráber

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Anan’ina, T.V., Kokhanenko, A.A. & Stegniy, V.N. Cyst geometry in the egg chambers of Calliphora erythrocephala Mg. (Diptera: Calliphoridae) ovaries. Protoplasma 251, 913–919 (2014). https://doi.org/10.1007/s00709-013-0593-9

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  • DOI: https://doi.org/10.1007/s00709-013-0593-9

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