Morpho-functional variety of the coxal glands in cheyletoid mites (Prostigmata). II. Cheyletidae |
| |
| Affiliation: | 1. Servei de Nefrologia i Trasplantament Renal, Hospital Clínic, Universidad de Barcelona, Barcelona, España;2. Servei de Anatomia Patològica, Hospital Clínic, Universidad de Barcelona, Barcelona, España;3. Servei de Medicina Interna, Hospital Clínic, Universidad de Barcelona, Barcelona, España;4. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Hospital Clínic, Universidad de Barcelona, Barcelona, España;5. Cellex, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Universidad de Barcelona, Barcelona, España;1. Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain;2. Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain;3. Servicio de Farmacología Clínica, Instituto de Investigación Sanitaria, Hospital Universitario de la Princesa, Universidad Autónoma de Madrid, Madrid, Spain;1. LIBIQUIMA, Departamento de Química, Facultad de Ingeniería, Universidad Nacional del Comahue, Neuquén, Argentina;2. Facultad de Ciencias Médicas, Universidad Nacional del Comahue, Cipolletti, Río Negro, Argentina;3. Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina;4. IMBECU-CONICET, Mendoza, Argentina;5. Facultad de Ciencias del Ambiente y la Salud, Universidad Nacional del Comahue, Neuquén, Argentina;1. School of Biological Sciences, College of Natural Sciences, Bangor University, Bangor LL57 2UW, UK;2. Medical Toxicology Centre, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK;1. Department of Statistics, State University of Maringá, Paraná, Brazil;2. Federal Institute of Education, Science and Technology of São Paulo, Araraquara, Brazil;3. Laboratory of Computer Vision, São Carlos School of Engineering, University of São Paulo, São Carlos, Brazil;1. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, United States;2. Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, United States |
| |
| Abstract: | Trombidiform mites are characterized by the presence of several paired glands in the anterior body portion united by a common conducting duct (podocephalic canal). Apart from the acinous (salivary) glands the podocephalic system includes a pair of tubular coxal glands (CGs) responsible for osmoregulation. The aim of the present study was to figure out how functional changes of acinous glands reflect on the corresponding CG. For this purpose, the anatomy and fine structure of the CG were analyzed in two mite species, Bakericheyla chanayi and Ornithocheyletia sp. (Cheyletidae), which have a different composition of their single acinous gland.The results showed that in both species the CG lacks a filtering saccule. It is composed of the proximal and distal tubes and leads into a cuticle-lined excretory duct. Both tubes demonstrate a similar species-specific fine structure. They are characterized by an extensive system of apical membrane invaginations (internal canals) associated with numerous large mitochondria. Local areas of modified internal canals were regularly observed in both species. They contain structures resembling those constituting filtering slit diaphragms of other animals.In O. sp., CG cells in addition demonstrate features characteristic of protein-like secretion. Apparently this correlates with the loss of true salivary glands in this species, as its acinous gland was previously assumed as silk producing. Contrary to this, the CG of B. chanayi shows no kind of granulation, which coincides with the presence of a salivary portion in its complex acinous gland.The microtubule-rich intercalary cells at the base of the excretory duct were associated with special muscles presumably regulating the dilation of the duct lumen. These cells might represent a basic feature common to different types of podocephalic glands. |
| |
| Keywords: | Coxal glands Ultrastructure Podocephalic system Trombidiform mites Osmoregulation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
