PL EN


Preferences help
enabled [disable] Abstract
Number of results
Journal
2001 | 49 | 3-4 | 215-224
Article title

Structure and development of ovaries in the weevil, Anthonomus pomorum (Coleoptera, Polyphaga). I. Somatic tissues of the trophic chamber

Authors
Title variants
Languages of publication
EN
Abstracts
EN
In developing ovarioles of Anthonomus pomorum (Coleoptera, Polyphaga, Curculionidae) the trophic chambers (tropharia) are relatively large and consist of clusters (clones) of germ cells and various somatic tissues. Each ovariole is enclosed within an outer epithelial sheath (tunica externa). Throughout the pupal phase, the growth of this sheath is accelerated and precedes the development of the rest of the ovariole. As a result, the epithelial sheath proliferates anteriorly and forms an elongated ?sleeve? that during the later stages of development becomes gradually filled by the growing tropharium. In the early pupal stage, a few terminal filament cells are observed in contact with the anterior end of the tropharium. These cells are separated from the rest of the trophic chamber by a transverse septum, which maintains continuity with the basal lamina. Beneath the basal lamina there is a layer of inner sheath cells, whereas inside the tropharium there are interstitial cells. These two types of cell differ morphologically in a mature ovary but they retain, until the end of the imago-B stage, a similar ultrastructure testifying to their common origin. At the posterior end of the tropharium, from the imago-B stage on, many young oocytes, surrounded by prefollicular cells, are observed. This is the so-called neck region of the tropharium. Extraction with Triton X-100 detergent showed that in a mature trophic chamber there are only individual microtubules arranged along the projections of interstitial cells. This indicates that the cytoskeleton elements (microfilaments and microtubules) participate only to a very limited extent in the spatial organisation of the tropharium in A. pomorum.
Keywords
Discipline
Publisher

Journal
Year
Volume
49
Issue
3-4
Pages
215-224
Physical description
Contributors
author
References
Document Type
ARTICLE
Publication order reference
P. Swiatek, Institute of Zoology, Jagiellonian University, R. Ingardena 6, 30-060 Krakow, Poland
Identifiers
YADDA identifier
bwmeta1.element.element-from-psjc-ce70c844-255c-3187-92f6-be4bbc3b4067
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.