Comparative ultrastructure of the salivary glands of two phytopathogen vectors,the beet leafhopper,Circulifer tenellus (Baker), and the corn leafhopper,Dalbulus maidis DeLong and Wolcott (Homoptera : Cicadellidae) |
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| Institution: | 1. Department of Plant Pathology, 110 Noble Research Center, Oklahoma State University, Stillwater, OK 74078, U.S.A.;2. Department of Physiological Sciences, Oklahoma State University, Stillwater, OK 74078, U.S.A.;1. Laboratory of Systematic Evolution and Biogeography of Woody Plants, School of Nature Conservation, Beijing Forestry University, NO.35 Qinghua Dong Road, Haidian, Beijing 100083, China;2. College of Forestry, Beijing Forestry University, NO.35 Qinghua Dong Road, Haidian, Beijing 100083, China;3. Museum of Beijing Forestry University, Beijing Forestry University, NO.35 Qinghua Dong Road, Haidian, Beijing 100083, China;1. Laboratoire CRISMAT ENSICAEN UMR CNRS 6508, 6 Boulevard du Maréchal Juin, Caen Cedex 14050, France;2. National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan;1. Maxwell Institute and School of Mathematics, The University of Edinburgh, James Clerk Maxwell Building, The King’s Buildings, Mayfield Road, Edinburgh, EH9 3JZ, United Kingdom;2. Maxwell Institute and School of Mathematical & Computer Sciences; Mathematics, Heriot–Watt University, Edinburgh, EH14 4AS, United Kingdom;1. University of Toronto, Faculty of Forestry, 33 Willcocks Street, Toronto, Ontario M5S 3B3, Canada;2. Agriculture and Agri-Food Canada, 5403 – 1 Avenue South, Lethbridge, Alberta T1J 4B1, Canada |
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| Abstract: | The salivary glands of 2 leafhoppers, Circulifer tenellus and Dalbulus maidis (Homoptera : Cicadellidae) were examined by light and electron microscopy. Centrally located and occupying both the head and thorax, the salivary glands consist of 2 paired parts, the accessory glands and the principal glands. In C. tenellus and D. maidis, the accessory glands are large, multicelled lobes that lie anterior to the principal gland. They join the principal glands near the common salivary duct-gland junction via a thinner tubular duct. The principal glands of both species consist of large binucleate cells that differ in cytology and arrangement. These cells are easily distinguished by unique staining characteristics. Circulifer tenellus salivary gland cells are arranged in 2 lobes, the anterior lobe, made up of 3 concentric rings around the salivary duct and the posterior lobe, arranged in a loose pyramid extending above the foregut. Dalbulus maidis glands are similarly organized around the salivary duct. |
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