Summary
The ultrastructure of seven types of neurosecretory cells (NSC) in the medial and lateral groups of the protocerebrum is described. The differences among cell types established earlier by light microscopy parallel differences in size and appearance of the neurosecretory particles observed in electron micrographs. No relationship was found between the affinity for Gomori's paraldehyde fuchsin stain and the nature of the particles.
The secretions of the A-, A1-, and C-types of NSC of the medial group are characterized by electron-dense neurosecretory granules of 1250 Å dia., medium-dense granules of 2100 Å, and electron-lucent vesicles of 1700 Å, respectively. The L-type NSCof the lateral group contain smaller (1300 Å) or larger (1700 Å) neurosecretory granules. The medial B- and E-types of NSC and the lateral LB-type contain granulated vesicles (1200 Å) of the same appearance. These cell types differ in other respects and most likely have separate functions.
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Bassurmanova, O.K., Panov, A.A.: Structure of the neurosecretory system in Lepidoptera. Light and electron microscopy of type A′-neurosecretory cells in the brain of normal and starved larvae of the silk worm Bombyx mori. Gen. comp. Endocr. 9, 245–262 (1967)
Borg, T.K., Marks, E.P.: Ultrastructure of the median neurosecretory cells of Manduca sexta in vivo and in vitro. J. Insect. Physiol. 19, 1913–1920 (1973)
Brady, J., Maddrell, S.H.P.: Neurohaemal organs in the medial nervous system of insects. Z. Zellforsch. 76, 389–404 (1967)
Cassier, P., Fain-Maurel, M.A.: Contribution à l'étude infrastructurale du système neurosécréteur rétrocérébral chez Locusta migratoria migratorioides (R. et F.).-II. Le transit des neurosécrétions. Z. Zellforsch. 111, 483–492 (1970)
Cazal, M., Joly, L., Porte, A.: Étude ultrastructurale des corpora cardiaca et de quelques formations annexes chez Locusta migratoria L. Z. Zellforsch. 114, 61–72 (1971)
Fahimi, H.D., Drochmans, P.: Essais de standardisation de la fixation au glutaraldéhyde.-I. Purification et détermination de la concentration du glutaraldéhyde. J. Microsc. 4, 725–736 (1965)
Falck, B., Owman, Ch.: A detailed methodological description of the fluorescent method for the cellular demonstration of biogenic monoamines. Acta Univ. Lund (Sec. II) 7, 1–19 (1965)
Geldiay, S., Edwards, J.S.: The protocerebral neurosecretory system and associated cerebral neurohemal area of Acheta domesticus. Z. Zellforsch. 145, 1–22 (1973)
Girardie, A.: Neurosécrétions cérébrales chez les Acridiens. Bull. Soc. zool. Fr. 95, 783–802 (1970)
Girardie, A., Girardie, J.: Étude histologique, histochimique, et ultrastructurale de la pars intercerebralis chez Locusta migratoria L. (Orthoptère). Z. Zellforsch. 78, 54–75 (1967)
Girardie, J.: Aspects histologique, histochimique et ultrastructurale des péricaryones neurosécréteurs latéraux du protocerebron de Locusta migratoria migratorioides (Insecte: Orthoptère). Z. Zellforsch. 141, 75–91 (1973)
Luft, J.H.: Improvements in epoxy resin embedding methods. J. biophys. biochem. Cytol. 9, 409–414 (1961)
Maddrell, S.H.P.: Neurosecretory control systems in insects. In: Insect ultrastructure (A.C. Neville, ed.). Symp. Roy. ent. Soc. Lond. 5, 101–116 (1970)
Normann, T.C.: The mechanism of hormone release from neurosecretory axon endings in the insect Calliphora erythrocephala. In: Aspects of neuroendocrinology (W. Bargmann, B. Scharrer, eds.), p. 30–42, Berlin-Heidelberg-New York: Springer 1970
Panov, A.A., Melnikova, E.Yu.: Comparative light and electron microscopic study of the neurosecretory cells in the brain of Lepidoptera. Abstr. Papers 7th Conf. Europ. comp. Endocrin. Budapest. 1973
Pellegrino de Iraldi, A., Gueudet, R., Suburo, A.M.: Differentiation between 5-hydroxytryptamine and catecholamines in synaptic vesicles. Progr. Brain Res. 34, 161–170 (1971)
Ramade, F.: Données histologiques, histochimiques et ultrastructurales sur la pars intercerebralis de Musca domestica L. Mem. Mus. nat. Hist. nat. (Sér. A) 58, 113–142 (1969)
Reynolds, E. S.: The use of lead citrate at high pH as an electron-opaque stain in electron microscopy. J. Cell Biol. 17, 208–212 (1963)
Sandifer, J.B., Tombes, A.S.: Ultrastructure of the lateral neurosecretory cells during reproductive development of Sitophilus granarius (L.) (Insecta: Coleoptera). Tissue & Cell 4, 437–446 (1972)
Scharrer, B.: Neurosecretion. XIII. The ultrastructure of the corpus cardiacum of the insect Leucophaea maderae. Z. Zellforsch. 60, 761–796 (1963)
Scharrer, B.: Neurosecretion. XIV. Ultrastructural study of sites of release of neurosecretory material in blattarian insects. Z. Zellforsch. 89, 1–16 (1968)
Schooneveld, H.: Structural aspects of neurosecretory and corpus allatum activity in the adult Colorado beetle, Leptinotarsa decemlineata (Say), as a function of daylength. Neth. J. Zool. 20, 151–237 (1970)
Schooneveld, H.: Insect neurosecretory systems and prospects of pest control by brain hormones. Meded. Fac. Landb.wetensch. Ghent 36, 838–847 (1971)
Schooneveld, H.: Ultrastructure of the neurosecretory system of the Colorado potato beetle, Leptinotarsa decemlineata (Say).-II. Pathways of axonal secretion transport and innervation of neurosecretory cells. Cell Tiss. Res. 154, 289–301, (1974a)
Schooneveld, H.: Ultrastructure of the neurosecretory system of the Colorado potato beetle Leptinotarsa decemlineata (Say).-III. The corpus cardiacum. In preparation (1974b)
Smith, U., Smith, D.S.: Observations on the secretory processes in the corpus cardiacum of the stick insect Carausius morosus. J. Cell Sci. 1, 59–66 (1966)
Weber, W., Gaude, H.: Ultrastruktur des Neurohaemalorgans im Nervus corporis allati II von Acheta domesticus. Z. Zellforsch. 121, 561–572 (1971)
Wendelaar Bonga, S.E.: Ultrastructure and histochemistry of neurosecretory cells and neurohaemal areas in the pond snail Lymnaea stagnalis (L.). Z. Zellforsch. 108, 190–224 (1970)
Wilde, J.de: Breeding the Colorado beetle under controlled conditions. Z. Pfl. Krankh. 64, 589–593 (1957)
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The author wishes to thank the Laboratory of Virology of the Agricultural University for the use of the electron microscope, Mr. J. Groenewegen and Miss J. van Rinsum for technical assistance, and Professor J. Lattin for correcting the English text. Part of the work has been done while the author was in the service of the Netherlands Organization for the Advancement of Pure Research (ZWO, grant 942-48), and the National Council for Agricultural Research (TNO).
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Schooneveld, H. Ultrastructure of the neurosecretory system of the Colorado potato beetle, Leptinotarsa decemlineata (Say). Cell Tissue Res. 154, 275–288 (1974). https://doi.org/10.1007/BF00223726
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DOI: https://doi.org/10.1007/BF00223726