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首页> 美国卫生研究院文献>Philosophical Transactions of the Royal Society B: Biological Sciences >The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment
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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

机译：内分泌繁殖的内分泌控制：一种新的多激素模型对它们在不断变化的环境中的功能作用具有影响

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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.
机译：夜蛾科对于河口生态系统的功能至关重要，并且是越冬鸟类和商品鱼饮食中的主要成分。他们使用环境提示来同步复制。光周期是最接近的线索，在温度补偿的过程中开始卵黄发生。 Nereidae的流行范例是控制生长和繁殖的单一“少年”激素。但是，这里提出了一种新的多激素模型，该模型整合了环境和内分泌控制生殖。体外生物测定的证据支持了这一点。少年激素显示出是热稳定的并且在物种之间具有交叉反应性。另外，第二种神经激素，在这里被鉴定为促性腺激素，被证明存在于成年女性中，并被发现促进卵母细胞的生长。此外，多巴胺和褪黑激素似乎可以关闭幼体激素，而5-羟色胺和催产素可以促进卵母细胞的生长。全球变暖很可能使温度和光周期之间的相位关系解耦，这对于在北纬冬季使用光周期来提示繁殖的内Ne科有重大影响。光周期反应的基因型适应可能是可能的，但对短期极端事件的反应可能会对繁殖力，产卵成功和募集产生重大影响。破坏内分泌的化学物质也可能影响Nereidae中假定的类固醇激素途径，并产生类似的后果。这些影响可能对Nereidae的功能作用产生重大影响，并突出了在这些和其他无脊椎动物中进行比较内分泌学研究的重要性。

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