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The duct system of the lachrymal salt gland of the green sea turtle, Chelonia mydas

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Summary

The duct system of the lachrymal salt gland of the green sea turtle comprises central canals, secondary ducts and a sac-like main duct. Distally the central canals consist of large columnar cells with lateral membranes folded into plicae which interdigitate in adjacent cells to form complex intercellular spaces. More proximally the central canals, secondary ducts and main duct consist of epithelia which are stratified or pseudostratified. The cells of these epithelia are separated by wide and complex inter-cellular spaces: they are joined by frequent maculae adherentes junctions. Complex intracellular webs of tonofilaments are associated with these junctions. At the luminal border of the epithelia of the secondary and main ducts is a layer of mucocytes. The mucocytes increase in density towards the proximal extremity of the main duct and secrete a thick luminal layer of mucus. The duct system is very well vascularised. It is suggested that it is unlikely to be merely a passive conduit and that it may have a role in the modification of the fluid secreted by the gland.

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References

  • Abel JH, Ellis RA (1966) Histochemical and electron microscopic observations on the salt secreting lachrymal glands of marine turtles. Am J Anat 118:337–358

    Google Scholar 

  • Bulger RE (1965) Electron microscopy of the stratified epithelium lining the secretory canal of the dogfish rectal gland. Anat Rec 151:589–608

    Google Scholar 

  • Ellis RA, Abel JH (1964) Intercellular channels in the salt-secreting glands of marine turtles. Science 144:1340–1343

    Google Scholar 

  • Farquhar MG, Palade GE (1965) Cell junctions in amphibian skin. J Cell Biol 26:263–291

    Google Scholar 

  • Kelley RO, Dekker RAF, Bluemik JG (1975) Thiocarbohydrazide-mediated osmium binding: a technique for protecting soft biological specimens in the scanning electron microscope. In: Hayat MA (ed) Principles and techniques of scanning electron microscopy. Vol 4, Van Nostrand Reinhold, New York, pp 34–44

    Google Scholar 

  • Kirschner LB (1977) The sodium chloride excreting cells in marine vertebrates. In: Gupta BL, Moreton RB, Oschmann JL, Wall BJ (eds) Transport of ions and water in animals. Academic Press, London, pp 427–452

    Google Scholar 

  • Marshall AT (1980) Freeze-substitution as a preparation technique for biological X-ray microanalysis. Scanning Electron Microsc 1980 (2):395–408

    Google Scholar 

  • Marshall AT (1988a) Intracellular and luminal ion concentrations in sea turtle salt glands: X-ray microanalysis of frozen-hydrated samples. Inst Phys Conf Ser No 93 (3): 559–560

    Google Scholar 

  • Marshall AT (1988b) A comparison of the salt glands of birds and sea turtles. In: Wong PYD, Young JA (eds) Exocrine secretion. Hong Kong University Press, Hong Kong, pp 107–110

    Google Scholar 

  • Marshall AT, Cooper PD (1988) Secretory capacity of the lachrymal salt gland of hatchling sea turtles, Chelonia mydas. J Comp Physiol 157:213–227

    Google Scholar 

  • Marshall AT, Hyatt AD, Phillips JG, Condron RJ (1985) Isosmotic secretion in the avian nasal salt gland: X-ray microanalysis of luminal and intracellular ion distributions. J Comp Physiol 156:213–227

    Google Scholar 

  • Marshall AT, King P, Condron RJ, Phillips JG (1987) The duct system of the avian salt gland as a transporting epithelium: structure and morphometry in the duck Anas platyrhynchos. Cell Tissue Res 248:179–188

    Google Scholar 

  • Prange HD (1985) Renal and extra-renal mechanisms of salt and water regulation of sea turtles: a speculative review. Copeia 1985:771–776

    Google Scholar 

  • Schmidt-Neilsen K, Fange R (1958) Salt glands in marine reptiles. Nature 182:783–785

    Google Scholar 

  • Shephard KL (1982) The influence of mucus of the diffusion of ions across the oesophagus of fish. Physiol Zool 55:23–34

    Google Scholar 

  • Van Lennep EW, Young JA (1979) Salt glands. In: Giebisch G (ed) Transport organs. Springer-Verlag, Berlin, Heidelberg, New York, pp 675–692

    Google Scholar 

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Authors and Affiliations

  1. Analytical Electron Microscopy Laboratory, Department of Zoology, La Trobe University, 3083, Bundoora, Melbourne, Victoria, Australia

    A. T. Marshall & S. R. Saddlier

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  1. A. T. Marshall
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  2. S. R. Saddlier
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Marshall, A.T., Saddlier, S.R. The duct system of the lachrymal salt gland of the green sea turtle, Chelonia mydas . Cell Tissue Res. 257, 399–404 (1989). https://doi.org/10.1007/BF00261842

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  • DOI: https://doi.org/10.1007/BF00261842

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