Journal ArticleDOI
Ultrastructural and functional aspects of the spermatheca of the African Migratory Locust Locusta migratoria migratorioides (Reiche and Fairmaire) (Orthoptera: Acrididae)
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The ultrastructure of the spermathecal epithelium of the African Migratory Locust Locusta migratoria migratorioides was investigated with the aid of transmission and scanning electron microscopic methods.Abstract:
The ultrastructure of the spermathecal epithelium of the African Migratory Locust Locusta migratoria migratorioides R. & F. (Orthoptera: Acrididae) was investigated with the aid of transmission and scanning electron microscopic methods. The unpaired spermatheca can be subdivided into a multiple coiled tube and a terminal bulb region with vestibule, small apical and extensive pre-apical diverticulum. The wall of the spermatheca consists of a chitin intima, a layer of epithelial cells with a distinct apical microvilli border and a layer of gland cells, whereby slender projections of the epithelial cells extend between the gland cells. Through extensive folding, the basal plasma membrane of the gland and epithelial cells form a huge labyrinth, which is bounded by a basal lamina. Extending into the above mentioned projections there are bundles of parallel-arrayed microtubules, which run perpendicular to the microvilli border of the epithelial cell. They end in the base region of the microvilli and in the basal labyrinth on hemidesmosomes and serve to provide a mechanically stressable anchorage for the epithelium. The gland cells show structures typical for the production of export proteins: ribosomes, rER, dictyosomes, as well as vesicles of different size and electron-density. Every gland cell contains an extracellular cavity, arising through invagination, which is coated with a microvilli border. Over an end-apparatus and a ductule joining onto it (also with chitin intima) the lumen of the extracellular cavity is connected with the spermathecal lumen. The release of secretions and other substances from the epithelium into the spermatheca lumen is as possible as the uptake of substances from the latter into the epithelium. Regional differences in the fine structure of the cuticular intima, epithelial and gland cells point to different functions of the epithelium in these regions.read more
Citations
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Journal ArticleDOI
The insect spermatheca: an overview.
TL;DR: This review examines several aspects of and gaps in the current understanding of spermatheca biology, including morphology, function, reservoir filling, development, and biochemistry.
Journal ArticleDOI
Neural and hormonal control of muscular activity of the spermatheca in the locust, Locusta migratoria.
Angela B. Lange,Rosa da Silva +1 more
TL;DR: This review highlights more recent literature, including new data, for neural and hormonal control of muscular activity of the spermatheca of the locust, Locusta migratoria, making reference to examples in other insects where relevant.
Journal ArticleDOI
Morphological and morphometrical assessment of spermathecae of Aedes aegypti females
TL;DR: Results obtained from periodic acid Schiff assays of cell apexes and lumens indicate that gland cells produce and secrete neutral polysaccharides probably related to maintenance of spermatozoa, contributing to understanding of gamete maintenance in the spermathecae of Ae.
Journal ArticleDOI
The association of crustacean cardioactive peptide with the spermatheca of the African migratory locust, Locusta migratoria
Rosa da Silva,Angela B. Lange +1 more
TL;DR: The present study suggests that CCAP acts as a neuromodulator/neurotransmitter at the spermathecal visceral tissue of female Locusta migratoria.
Journal ArticleDOI
She's got nerve: roles of octopamine in insect female reproduction.
TL;DR: The role of octopamine in female reproduction in the fruit fly Drosophila melanogaster has been investigated in this paper, where the female's OA signaling system interacts with male molecules transferred during mating to elicit a subset of post-mating changes.
References
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Journal ArticleDOI
The spermatheca of Melanoplus sanguinipes (Fabr.). I. Morphology, histology, and histochemistry
Ijaz Ahmed,Cedric Gillott +1 more
TL;DR: The spermatheca of Melanoplus sanguinipes consists of a preapical and an apical diverticulum, and a long, thin ductus seminalis, and Histologically, the three components are identical.
Journal ArticleDOI
An electron microscopic study of the spermathecal complex of virgin aedes Aegypti mosquitoes
TL;DR: Virgin mosquitoes were studied with the electron microscope to study the role of secretory material in spermathecae of virgins, which does not form a complete internal membrane.
Journal ArticleDOI
The glandular units of the spermathecae of machilids (Microcoryphia): ultrastructure and modifications during moulting
TL;DR: The spermathecae of 4 species of Microcoryphia present characteristics related to the primitive phylogenetic position of these apterygote insects, including paired organs situated in the 8th abdominal segment on each side of the rudimentary genital chamber.
Journal ArticleDOI
Spermathecal ultrastructure of the insect Rhodnius prolixus stal
TL;DR: The possible role of the spermathecae in maintaining the stored luminal sperm and its role in transmitting the mating stimulus is considered in light of the epithelial ultrastructure.
Journal ArticleDOI
Scanning electron microscopy of the spermatheca in Sitophilus granarius (L.)
TL;DR: With scanning electron microscopy the spermathecal organ of Sitophilus granarius has been examined and vascular sinuses opening from the body cavity into the body of the glands are observed as pores on the surface of the gland.
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