Ultrastructural and functional aspects of the spermatheca of the African Migratory Locust Locusta migratoria migratorioides (Reiche and Fairmaire) (Orthoptera: Acrididae) |
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| Affiliation: | 1. Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China;2. Key Laboratory of Forest Disaster Warning and Control in Yunnan Province, College of Forestry, Southwest Forestry University, 650224 Kunming, China;3. CEFE UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE, Montpellier, France;1. Departamento de Biologia Geral, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;2. Dipartimento Scienze Della Vita, Università Degli Studi di Siena, Via Aldo Moro 2, 53100, Siena, Italy;1. Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, Building A18, 625 00, Brno, Czech Republic;2. Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 5, Building A29, 625 00, Brno, Czech Republic;1. Humboldt-University Berlin, Department of Biology, Behavioral Physiology, Invalidenstrasse 43, 10115 Berlin, Germany;2. Friedensallee 37, 14532 Stahnsdorf, Germany;3. Museum für Naturkunde, Invalidenstrasse 43, 10115 Berlin, Germany;4. University of Melbourne, School of Biosciences, Melbourne, VIC 3010, Australia;1. Evolutionary Biology and Ecology, Université Libre de Bruxelles, 1050 Brussels, Belgium;2. Centre for Social Evolution, University of Copenhagen, 2100 Copenhagen, Denmark;1. Institut de Recherche en Biologie Végétale, Département de sciences biologiques, Université de Montréal, 4101 rue Sherbrooke Est, Montréal, Québec H1X 2B2, Canada;2. Centre de Recherche et de Développement en Horticulture, Agriculture et Agroalimentaire Canada, 430 boul. Gouin, Saint-Jean-sur-Richelieu, Québec J3B 3E6, Canada;3. UMR 7263 IMBE, Aix Marseille Université – CNRS – IRD – Université d’Avignon et des Pays de Vaucluse, Université d''Avignon, 301 rue Baruch de Spinoza, 84916 Avignon Cedex 09, France |
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| 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. |
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