“Secretory end-feet”—axon terminals of unusual cytological character and probable neuroglandular significance in Nereis (polychaeta; Annelida)

Golding, D. W.; Whittle, A.C.

doi:10.1016/s0022-5320(75)80056-6

Cited by 13 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus the complexity of sperm attachment in Spirorbis appears to be unique among examples of sperm storage so far known. Scalariform junctions have been described in the basal infoldings of an excretory tubule (Fain-Maurel & Cassier, 1972) and between 'secretory end-feet' and surrounding glial cells in nereid polychaetes (Golding & Whittle, 1975). In both situations they are assumed to promote intercellular transport and such a specialization seems appropriate to membrane junctions forming between sperm and spermatheca cells in Spirorbis.…”

mentioning

confidence: 99%

A description of the spermatheca ofSpirorbis spirorbis(L.) (Polychaeta: Serpulidae) and evidence for a novel mode of sperm transmission

Daly

Golding

1977

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

Brood protection is characteristic of the Spirorbinae although the mode of protection differs widely between species (Bailey, 1969; Knight-Jones, Knight-Jones & Vine, 1972). The way in which these protected eggs are successfully fertilized has been a subject of speculation (Gee & Williams, 1965; Franzen, 1956; Potswald, 1968). Individuals of the Spirorbinae are simultaneous hermaphrodites and the possible role of self-fertilization in their reproduction has been considered (Gee & Williams, 1965; Potswald, 1968). In the past, these problems have been discussed with the tacit assumption that no spermatheca is present in the Spirorbinae.

show abstract

mentioning

confidence: 99%

A description of the spermatheca ofSpirorbis spirorbis(L.) (Polychaeta: Serpulidae) and evidence for a novel mode of sperm transmission

Daly

Golding

1977

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

show abstract

“…Axons end blindly to form large numbers of terminals on the inner surface of the capsule on the brain floor (Dhainaut-Courtois, 1966;Golding et al, 1968). These are characterized by an abundance of mitochondria (these are exceptional in size and ultrastructure in nereids) and certain small numbers of "granulated vesicles " usually clustered close to the plasma membrane adjacent to the capsule (Golding & Whittle, 1974). In Nereis species, a paired ganglionic nucleus of neuron perikarya from which the axons of these terminals arise has been detected.…”

Section: Annelida -Polychaeta (I) Cytological Observationsmentioning

confidence: 99%

“…In Nereis species, a paired ganglionic nucleus of neuron perikarya from which the axons of these terminals arise has been detected. The axons form a pair of tracts (which are distinct from the tracts of typical neurosecretory axons) that can be traced from the nuclei to the brain floor (Golding & Whittle, 1974). The evidence supporting the endocrine status of these remarkable structures is, at present, indirect and inconclusive.…”

Section: Annelida -Polychaeta (I) Cytological Observationsmentioning

confidence: 99%

“…As endocrine phenomena, these occurrences are singular indeed. Among other striking features, the unusual character of the source of the gonad-stimulating substance (namely, the hypodermal supporting cell layer of the radial nerve) in starfishes (Chaet, 1966~; De Angelis et al, 1972); the "secretory end-feet" of polychaetes (Golding & Whittle, 1974); and the neurovenous tissues of cephalopods (Young, 1970) may be mentioned.…”

Section: I4mentioning

confidence: 99%

See 1 more Smart Citation

A Survey of Neuroendocrine Phenomena in Non‐arthropod Invertebrates

Golding

1974

Biological Reviews

View full text Add to dashboard Cite

SUMMARY Neurosecretory phenomena are apparently ubiquitous among Metazoa. In Hydra, neurosecretory products are probably involved in the control of growth and reproduction. Secretory elements in the central nervous system of turbellarians probably promote fission, regeneration and reproduction. The cerebral ganglia of nemertines are the source of a hormone which exercises an inhibitory influence on maturation of the gonads and the development of somatic sexual characteristics. A principle secreted by the ganglia and/or the associated cerebral organs controls weight regulation. A sex hormone controls sexual differentiation. Secretory neurons may influence the production of exsheathing fluid and ecdysis in nematodes. In nereid polychaetes, a single hormone which originates from the cerebral neuroendocrine system apparently promotes segment proliferation and inhibits maturation. However, in certain other polychaetes, contrasting endocrine mechanisms seem to operate. In lumbricid oligochaetes, a hormone secreted by the cerebral ganglion (and possibly by other nervous centres also) promotes gonadal activity and the differentiation of somatic sexual characters. In some species the ganglion exerts an inhibitory influence on the associated processes of ‘diapause’ and posterior regeneration. The cerebral and suboesophageal ganglia are implicated in the control of osmoregulation. Cerebral neurosecretory cells in limicolous oligochaetes may influence regenerative growth and osmoregulation. The cerebral ganglia of leeches secrete a gonadotrophic hormone. In gastropod molluscs, hormones secreted by the cerebral ganglia, glandular ‘dorsal bodies’ and/or optic tentacles are responsible for the control of the development of the reproductive tract, and the activity of the gonads. Contrasting mechanisms are thought to operate in the different gastropod groups and there is conflicting evidence particularly with respect to the endocrine functions of the optic tentacles and the gonads. The ‘bag cells’ of the abdominal ganglion of ApZysiu secrete a hormone which induces egg‐laying. Cells in the pleural and parietal ganglia probably control osmoregulation in Lymnaea. The optic glands of cephalopods secrete a gonadotrophic hormone, but sex hormones are apparently absent. The functional significance of the neurovenous tissues (presumptive neurosecretory complexes of unusual character) is obscure in most cases. The radial nerves of starfish are the source of a hormone which induces the production of I‐methyl adenine by the follicle cells of the gonad. This second principle stimulates oocyte maturation and the shedding of male and female gametes. The relevance of such information to the development of certain biological concepts and to various aspects of comparative physiology is briefly discussed.

show abstract

Intercellular junctions in the corpora cardiaca of locusts

Pow

Golding

1989

Cell Tissue Res.

View full text Add to dashboard Cite

“Secretory end-feet”—axon terminals of unusual cytological character and probable neuroglandular significance in Nereis (polychaeta; Annelida)

Cited by 13 publications

References 43 publications

A description of the spermatheca ofSpirorbis spirorbis(L.) (Polychaeta: Serpulidae) and evidence for a novel mode of sperm transmission

A description of the spermatheca ofSpirorbis spirorbis(L.) (Polychaeta: Serpulidae) and evidence for a novel mode of sperm transmission

A Survey of Neuroendocrine Phenomena in Non‐arthropod Invertebrates

Intercellular junctions in the corpora cardiaca of locusts

Contact Info

Product

Resources

About