Endocrinology, Regeneration and Maturation in Nereis

Golding, D. W.

doi:10.2307/1539918

Cited by 43 publications

(36 citation statements)

References 13 publications

(30 reference statements)

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“…For example, once the oocytes of N. diversicolor reach 140 mm, regeneration of amputated segments is not observed. Similarly, the removal of the supraoesophageal ganglion at this stage does not result in the precocious development of the oocytes (Golding 1967).…”

Section: Endocrine Control Of Reproductionmentioning

confidence: 89%

“…In this model, the supra-oesophageal ganglion secretes a juvenile hormone called nereidine. High concentration of nereidine promotes growth and regeneration of lost segments in young animals (Golding 1967). The hormone also permits the accumulation of oogonia into the coelom (pre-vitellogenesis) while inhibiting sexual maturation (Golding 1967;Franke & Pfannensteil 1984).…”

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

“…High concentration of nereidine promotes growth and regeneration of lost segments in young animals (Golding 1967). The hormone also permits the accumulation of oogonia into the coelom (pre-vitellogenesis) while inhibiting sexual maturation (Golding 1967;Franke & Pfannensteil 1984). Removal of the hormone leads to precocious sexual development, but oocytes form abnormally and degenerate.…”

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

“…The animal's ability to regenerate lost segments is greatly reduced (Golding 1967), and this is coupled with a decrease in the growth rate of the animal. At the same time, the gametes begin to develop (Clark & Ruston 1963;Clark & Scully 1964;Andries 2001).…”

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

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The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment

Lawrence

Soame

2009

Phil. Trans. R. Soc. B

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Nereidae are vital to the functioning of estuarine ecosystems and are major components in the diets of over-wintering birds and commercial fish. They use environmental cues to synchronize reproduction. Photoperiod is the proximate cue, initiating vitellogenesis in a temperature-compensated process. The prevailing paradigm in Nereidae is of a single ‘juvenile’ hormone controlling growth and reproduction. However, a new multi-hormone model is presented here that integrates the environmental and endocrine control of reproduction. This is supported by evidence from in vitro bioassays. The juvenile hormone is shown to be heat stable and cross reactive between species. In addition, a second neuro-hormone, identified here as a gonadotrophic hormone, is shown to be present in mature females and is found to promote oocyte growth. Furthermore, dopamine and melatonin appear to switch off the juvenile hormone while serotonin and oxytocin promote oocyte growth. Global warming is likely to uncouple the phase relationship between temperature and photoperiod, with significant consequences for Nereidae that use photoperiod to cue reproduction during the winter in northern latitudes. Genotypic adaptation of the photoperiodic response may be possible, but significant impacts on fecundity, spawning success and recruitment are likely in response to short-term extreme events. Endocrine-disrupting chemicals may also impact on putative steroid hormone pathways in Nereidae with similar consequences. These impacts may have significant implications for the functional role of Nereidae and highlight the importance of comparative endocrinology studies in these and other invertebrates.

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Section: Endocrine Control Of Reproductionmentioning

confidence: 89%

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

Section: Endocrine Control Of Reproductionmentioning

confidence: 99%

See 2 more Smart Citations

The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment

Lawrence

Soame

2009

Phil. Trans. R. Soc. B

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“…Similar to crustaceans, regulation of hormone levels of annelids is basically inhibitory. Single brain hormone is responsible for promoting growth and also inhibiting maturation (Golding, 1967) of both the female (Gaudron and Bentley, 2002) and male (Andries, 2001). Hormone production is a response from environmental cues followed by an oocyte maturationinducing hormone.…”

Section: Discussionmentioning

confidence: 99%

Identification of progesterone and 17α-hydroxyprogesterone in polychaetes (Perinereis sp.) and the effects of hormone extracts on penaeid oocyte development in vitro

et al. 2007

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Segment number threshold determines juvenile onset of germline cluster expansion in Platynereis dumerilii

et al. 2021

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Development of sexual characters and generation of gametes are tightly coupled with growth. Platynereis dumerilii is a marine annelid that has been used to study germline development and gametogenesis. P. dumerilii has germ cell clusters found across the body in the juvenile worms, and the clusters eventually form the gametes. Like other segmented worms, P. dumerilii grows by adding new segments at its posterior end. The number of segments reflect the growth state of the worms and therefore is a useful and measurable growth state metric to study the growth‐reproduction crosstalk. To understand how growth correlates with progression of gametogenesis, we investigated germline development across several developmental stages. We discovered a distinct transition period when worms increase the number of germline clusters at a particular segment number threshold. Additionally, we found that keeping worms short in segment number, by manipulating environmental conditions or via amputations, supported a segment number threshold requirement for germline development. Finally, we asked if these clusters in P. dumerilii play a role in regeneration (as similar free‐roaming cells are observed in Hydra and planarian regeneration) and found that the clusters were not required for regeneration in P. dumerilii, suggesting a strictly germline nature. Overall, these molecular analyses suggest a previously unidentified developmental transition dependent on the growth state of juvenile P. dumerilii leading to substantially increased germline expansion.

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Endocrinology, Regeneration and Maturation in Nereis

Cited by 43 publications

References 13 publications

The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment

The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment

Identification of progesterone and 17α-hydroxyprogesterone in polychaetes (Perinereis sp.) and the effects of hormone extracts on penaeid oocyte development in vitro

Segment number threshold determines juvenile onset of germline cluster expansion in Platynereis dumerilii

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