. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NEURONAL CENTRALIZATIONS IN CORYM- 19. Figure 7. Stalk of a capitate tentacle. Thick parallel RFamide-positive neurites are linked by thin neurites (arrow). Bar = 20 jim. Figure 8. Head of a capitate tentacle focused on the mesoglea. The pericaryons of the neurites are centralized in the center of the heads. Thin dendritic protrusions (arrowhead) project towards the surface of the tentacle. Bar = 20 Mm. Figures 9-10. Nomarski interference contrast (Fig. 9) and fluorescence image (Fig. 10) of a capitate tentacle. The nematocy
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NEURONAL CENTRALIZATIONS IN CORYM- 19. Figure 7. Stalk of a capitate tentacle. Thick parallel RFamide-positive neurites are linked by thin neurites (arrow). Bar = 20 jim. Figure 8. Head of a capitate tentacle focused on the mesoglea. The pericaryons of the neurites are centralized in the center of the heads. Thin dendritic protrusions (arrowhead) project towards the surface of the tentacle. Bar = 20 Mm. Figures 9-10. Nomarski interference contrast (Fig. 9) and fluorescence image (Fig. 10) of a capitate tentacle. The nematocytes (NC) are anchored at the mesoglea (small arrows) by thin, noncontractile stalks (bent arrow). Nematocytes and sensory cells are not labeled by the antibody against RFamides. RFamide- positive dendrites (arrowhead) terminate at the nematocytes. Bars = 20 and hydrozoans (Grimmelikhuijzen, 1985; for review see Grimmelikhuijzen el at, 1991). Although the occurrence of RFamide-like neuropep- tides within the cnidarian nervous system is so far widely accepted, the use of nonpeptidic transmitters by cnidarians is still controversially discussed. Morphological, bio- chemical, and physiological data indicate that at least cat- echolamines may be additional candidates for neuro- transmission (Wood and Lentz, 1964; Martin and Spen- cer, 1983: Kolberg and Martin. 1988; Takeda and Svendsen, 1991: Carlberg, 1992). but the cellular local- ization and distribution of these substances within the epithelial tissues and the neuronal network must be clar- ified more precisely. In the present work, the antiserum 146III against RFamides, which was produced by Grimmelikhuijzen and coworkers (for details see Grimmelikhuijzen, 1985), was shown to label the neuronal network of the hydro- zoan polyp Coryne sp. Because the double-labeling ex- periments with anti-/3-tubulin revealed that most of the. Please note that these images are extracted from scanned page images that may have been digitally enhan
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