Vitellogenesis of the digenean Plagiorchis elegans (Rudolphi, 1802) (Plagiorchioidea,Plagiorchiidae) |
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| Institution: | 1. University of Corsica, CNRS UMR 6134, Laboratory “Parasites and Mediterranean Ecosystems”, 20250 Corte, Corsica, France;2. Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, BP 5055, Dakar, Senegal;3. Department of Biology, University of North Dakota, 10 Cornell Street, 101 Starcher Hall, Grand Forks, ND 58202, USA;1. Department of Epidemiology and Biostatistics, School of Public Health, Fudan University, Shanghai, People''s Republic of China;2. Key Laboratory of Public Health Safety, Ministry of Education, Shanghai, People''s Republic of China;3. Laboratory for Spatial Analysis and Modeling, School of Public Health, Fudan University, Shanghai, People''s Republic of China;4. Department of Microbiology and Health, School of Public Health, Fudan University, Shanghai, People''s Republic of China;5. Department of Environmental Art and Architecture, Changsha Environmental Protection Vocational Technical College, Hunan, People''s Republic of China;6. Faculty of Veterinary Science, The University of Sydney, Sydney, New South Wales, Australia;7. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, People''s Republic of China;1. The Vincent and Elinor Ostrom Workshop in Political Theory and Policy Analysis, Indiana University, Bloomington, IN, USA;2. Center for the Study of Institutions, Population, and Environmental Change, Indiana University, Bloomington, IN, USA;3. Environmental Studies Program, Dartmouth College, Hanover, NH, USA;1. Laboratory of Molecular Ecology and Evolutionary Parasitology, Departamento de Zoologia, Universidade Federal do Paraná, PR 81531–980, Brazil;2. Health Education Program, School of Health Professions, Campus Box 8090, Idaho State University, Pocatello, ID 83209, USA;3. Universidade Federal do Pará, Campus Universitário de Bragança, Instituto de Estudos Costeiros; Alameda Leandro Ribeiro s/n., 68600–000 Bragança, PA, Brazil |
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| Abstract: | The ultrastructural organization of vitellogenesis of Plagiorchis elegans (Rudolphi, 1802), experimentally obtained from the golden hamster Mesocricetus auratus (Linnaeus, 1758), is described using transmission electron microscopy. This study is the first ultrastructural study of vitellogenesis in a member of the superfamily Plagiorchioidea. The four stages usually observed during vitellogenesis are described: stage I, cytoplasm of the vitellocytes mainly filled with ribosomes and few mitochondria; stage II, beginning of the synthetic activity; stage III, active synthesis of the shell globule clusters; stage IV, vitellocytes are filled with shell globule clusters and contain several lipid droplets, and glycogen granules are grouped around clusters and droplets. Vitellogenesis in P. elegans is compared with that of other Digenea. The differences among P. elegans and previously studied digeneans include, but are not limited to the occurrence of dense coiled endoplasmic reticulum saccules and the concentration of glycogen in the mesenchyme, which may be considered as a fifth stage of maturation of the vitelline glands. This peculiarity was not observed in all trematodes, which clearly indicates differences in the vitellogenesis in various digenean lineages at different stages of maturation of their vitelline cells. |
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