ISSN:
1432-0878
Keywords:
Cytoplasmic transport
;
Insect ovary
;
Autoradiography
;
Electron microscopy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The ovarioles of Coccinella and Tenebrio are shown to be telotrophic — a characteristic normally associated with hemipterans rather than coleopterans. They possess an anterior region of trophic cells and a chain of oocytes. The trophic cells are connected with the latter by a series of nutritive tubes, and autoradiography has shown that RNA is transported along the tubes to the oocytes. However, the system in these beetles differs markedly from that of hemipterans in that the nutritive tubes do not contain an extensive complement of aligned microtubules. The significance of this to both the mechanism and the selectivity of transport is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00209974
