Ontogenetic fate of the neurosecretory cells in the larval brain ofSarcophaga ruficornis (fabricius, 1794) (diptera: Cyclorrhapha)

Dogra, G. S.; Tandan, B. K.

doi:10.1007/bf02141895

Cited by 12 publications

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“…Therefore, it was thought that a study of the neurosecretory system of the earthworm, Pheretima posthuma, which is devoid of a well-developed storage-andrelease organ (Dogra, 1967b), with the help of a newly evolved bulk-staining technique (Dogra & Tandan, 1964), might provide fruitful results. This technique has given clues to a number of problems in the past (Dogra, 1967a;Dogra & Tandan, 1965 which histological techniques had failed to reveal. The results so obtained, along with some interesting features observed during the course of investigation, are discussed below.…”

Section: Introductionmentioning

confidence: 99%

Studies in situ on the neurosecretory system of the earthworm, Pheretima posthuma

Dogra

1968

Journal of Zoology

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The neurosecretory system of the earthworm, Pheretima posthuma, has been studied by PF, PATh and PAVB bulk‐stained preparations and sections. There are three types (a, b and c) of neurosecretory cells in the cerebral ganglion, suboesophageal ganglion and the nerve cord ganglia. Axons of a‐ and b‐cells are observed in toto in the cerebral and the suboesophageal ganglions. The axons are short and their axonal ends are bulb‐like. While the axons of the neurosecretory cells of the cerebral ganglion remain directed ventrally, those of the suboesophageal ganglion converge in a small area. This area has been considered as the neurohaemal organ, but of an elementary type. In the cerebral ganglion b‐cells exhibit a vacuolated cytoplasm. Vacuoles of varying size and number have been observed in those cells whose perikarya are loaded heavily with NSM. The vacuoles and the associated neurosecretory material extrude from the cell after rupturing the cell wall and the released material, associated with the vacuoles, is observed in the form of discrete bodies between the neurosecretory cells. After traversing the intercellular spaces the NSM accumulates on the ventral surface of the cerebral ganglion and some material is found to extend towards the suboesophageal ganglion, via the circumoesophageal connectives. It is suggested that a part of the NSM is absorbed into the blood vessels in the region of the cerebral ganglion and the remainder in the region of the suboesophageal ganglion; but the mechanism by which the liberated material is absorbed in the blood has not been determined. Thus in Pheretima there are two neurosecretory pathways—intracellular and intercellular—for the transportation of NSM elaborated by the perikaryon.

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Section: Introductionmentioning

confidence: 99%

Studies in situ on the neurosecretory system of the earthworm, Pheretima posthuma

Dogra

1968

Journal of Zoology

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“…Fraser (1957Fraser ( , 1959 found another group of NSCs, called "group 6" in the original study, which stained with PAF in a posterior region of the Lucilia caesar larval brain. vealed in the dorso-medial region of larval brains in the buffalo-fly Lyperosia exigua, housefly Musca domestica, and mosquitoes Aedes aegypti and Culiseta inornata (Burgess and Rempel, 1966;Burgess, 1971;Panov, 1975;Khurad and Thakare, 1983 (Burgess and Rempel, 1966;Dogra and Tandan, 1965;Khan et al, 1978;Khurad and Thakare, 1983). Group IV in Calliphora vicina and "group 6" in Lucilia caesar move into a lateral position in the protocerebrum and persist as LNCs of the PL in the adult brain (Fraser, 1959;Khan et al, 1978) (Fig.…”

Section: Introductionmentioning

confidence: 92%

“…1A). These groups undergo reorientation during ontogeny, with groups I and II becoming closer to each other in mature third instar larvae that are ready to pupate (Dogra and Tandan, 1965;Tandan and Dogra, 1966;Khan et al, 1978). Chrome alum hematoxylin (CH) also stained four groups in third instar larvae of the Indian housefly Musca nebulo Bhaskaran, 1966 -1967a).…”

Section: Introductionmentioning

confidence: 94%

“…Different staining techniques classified 3 to 5 cell groups per hemisphere, according to the location of the cells. Staining with PAF after oxidation with acidified potassium permanganate revealed four main groups of NSCs per hemisphere in the first instar larvae of the flesh fly Sarcophaga ruficornis (Dogra and Tandan, 1965) and the blowfly Calliphora vicina (previously called Calliphora erythrocephala) (Khan et al, 1978). Groups I, II, and III displayed intense staining in the dorso-medial regions of the protocerebrum while Group IV displayed faint staining in the posterior lateral region (Fig.…”

Section: Introductionmentioning

confidence: 98%

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Anatomy and functions of brain neurosecretory cells in diptera

Siga

2003

Microscopy Res & Technique

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In the larval brain of dipteran insects, there are two medial and three lateral groups of neurons innervating the ring gland. One lateral group extends fibers to the corpus allatum. After metamorphosis, a large cluster of the medial group in the pars intercerebralis and two lateral groups in the pars lateralis innervate the retrocerebral complex and some neurons from the lateral group and a few from the medial group extend fibers to the corpus allatum in the adults. Neuropeptides such as insulin-like peptides, FMRFamide related peptides, Locusta-diuretic hormone, beta-pigment dispersing hormone, Manduca sexta-allatostatin, ovary ecdysteroidogenic hormone, and proctolin have been immunocytochemically revealed in medial groups in the pars intercerebralis, and FMRFamide related peptides, beta-pigment dispersing hormone, corazonin, and M. sexta-allatostatin in lateral groups in the pars lateralis of dipteran brains. In mosquitoes after the blood meal, ovary ecdysteroidogenic hormone from 2-3 pairs of medial neurosecretory cells is released at the corpus cardiacum to stimulate the ovaries to secrete ecdysteroid to cause ovarian development. In addition to ovarian development, removal and implantation experiments have shown that neurosecretory cells in the pars intercerebralis and pars lateralis are involved in control of reproductive diapause, cuticular tanning, sugar metabolism, and diures.

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Neuropeptide‐Fmrfamide‐Like immunoreactivity in drosophila: Development and distribution

White

Hurteau

Punsal

1986

J of Comparative Neurology

170

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Neuropeptide-FMRFamide-like immunoreactivity was characterized in the fruit fly, Drosophila melanogaster. In the adult central nervous system, a stereotypic pattern of immunoreactive cell bodies and immunoreactive nerve processes and varicosities was observed, indicating a neurochemical role for FMRFamide-like substance(s) in Drosophila. Localization of immunoreactivity in the central nervous system of early larval stage revealed that the majority of the prominent FMRFamide-like immunoreactive neurons were already differentiated. The FMRFamide-like immunoreactive neurons remain immunoreactive throughout postembryonic stage and persist in the adult central nervous system. In the larva, in addition to the central nervous system, FMRFamide-like immunoreactivity was localized in the fibers innervating the ring gland, in the ganglion innervating the gut and in the gastric caeca.

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Ontogenetic fate of the neurosecretory cells in the larval brain ofSarcophaga ruficornis (fabricius, 1794) (diptera: Cyclorrhapha)

Cited by 12 publications

References 1 publication

Studies in situ on the neurosecretory system of the earthworm, Pheretima posthuma

Studies in situ on the neurosecretory system of the earthworm, Pheretima posthuma

Anatomy and functions of brain neurosecretory cells in diptera

Neuropeptide‐Fmrfamide‐Like immunoreactivity in drosophila: Development and distribution

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