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The sensory border of the land planarian Bipalium kewense (Tricladida, Terricola)
Fernandes, M.C.; Alvares, E.P.; Gama, P.; Silveira, M. (2001). The sensory border of the land planarian Bipalium kewense (Tricladida, Terricola). Belg. J. Zool. 131(Suppl. 1): 173-178
In: Belgian Journal of Zoology. Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Gent. ISSN 0777-6276; e-ISSN 2295-0451, more
Also appears in:
Saló, E.; Watson, N.; Schockaert, E. (Ed.) (2001). Proceedings of the 9th International Symposium on the Biology of the Turbellaria, Barcelona, Spain, June 2000. Belgian Journal of Zoology, 131(Suppl. 1). Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Diepenbeek. 236 pp., more
Peer reviewed article  
Available in  Authors 
Keywords
    Chemistry > Biology > Biochemistry > Enzymology > Biochemistry > Histology > Histoenzymology > Chemistry > Histology > Histochemistry > Immunochemistry > Immunohistochemistry
    Hormones > Gastrointestinal hormones > Vasodilator agents > Kinins > Slow reacting substances > Neuropeptides > Neurotransmitters > Substance p
    Skin
    Ultrastructure
    Platyhelminthes [WoRMS]
    Marine/Coastal
Authors  Top 
  • Fernandes, M.C.
  • Alvares, E.P.
  • Gama, P.
  • Silveira, M.
Abstract
    The lunular headplate of Bipalium kewense is limited all around its margin by a distinct sensory organ, consisting of a row of papillae, intercalated with ciliated pits. We have investigated the detailed morphology of this sensory region by means of scanning and transmission electron microscopy, as well as, immunohistochemistry. Epithelial cells of the papillae have insunk nuclei and a microvillar border. The dense cytoplasm contains a system of smooth, elongate, vesicles. Monociliated ends of multipolar dendrites come to the surface of the headplate through the epithelial cells. Pear-shaped ciliated pits insert among the papillae. These pits are also provided with sensory dendrites having longer cilia, that are interpreted as chemo-receptors. The distal ends of receptors at both locations are provided with belt-ne septate junctions, especially evident following lanthanum. impregnation. Immunohistochemical experiments by indirect immunofluorescence have localized substance P in the ciliated receptors, thereby confirming their sensory nature.
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