Meeting the energetic demands of insect diapause: Nutrient storage and utilization
Meeting the energetic demands of insect diapause: Nutrient storage and utilization
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DOI：
10.1016/j.jinsphys.2007.03.018
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发表时间：
2007-08-01
影响因子：
2.2
通讯作者：
Denlinger, David L.
中科院分区：
文献类型：
--
作者：
Hahn, Daniel A.;Denlinger, David L.
处于滞育期的昆虫通常很少进食或根本不进食，因此它们在很大程度上或完全依赖于进入滞育期之前隔离的能量储备。脂肪是这一时期使用的主要储备，但非脂肪储备对某些物种也很重要，特别是在滞育的某些阶段。代谢抑制，加上冬季的低温，有利于在大多数滞育的几个月里经济地利用储备。虽然许多昆虫在进入滞育之前储存了额外的脂质，但我们对文献的回顾表明，情况并非总是如此。我们提供的证据表明，营养储存和代谢之间的相互作用可以影响进入滞育的决定，并决定在滞育中停留多长时间。此外，滞育期间消耗的能量储备对滞育后的适合度有深远的影响。尽管在滞育之前和滞育期间调节营养稳态的生理和生化机制仍然知之甚少，但我们提出了几种有可能促进滞育相关营养稳态的机制。潜在的参与者包括胰岛素信号、神经肽F、cgmp激酶、amp活化蛋白激酶和脂肪动力学激素。(C) 2007 Elsevier Ltd.版权所有。
Insects in diapause characteristically feed very little or not at all, thus they are largely or totally dependent on energy reserves sequestered prior to the entry into diapause. Fats are the dominant reserve used during this period, but non-fat reserves are also important for some species, especially during certain phases of diapause. Metabolic depression, coupled with the low temperatures of winter, facilitates the economic utilization of reserves during the many months typical of most diapauses. Though many insects store additional lipid prior to the entry into diapause, our review of the literature indicates that this is not always the case. We provide evidence that interactions between nutrient storage and metabolism can influence the decision to enter diapause and determine how long to remain in diapause. In addition, the energy reserves expended during diapause have a profound effect on post-diapause fitness. Though the physiological and biochemical mechanisms that regulate nutrient homeostasis prior to and during diapause remain poorly known, we propose several mechanisms that have the potential to contribute to diapause-associated nutrient homeostasis. Potential players include insulin signaling, neuropeptide F, cGMP-kinase, AMP-activated protein kinase, and adipokinetic hormone. (C) 2007 Elsevier Ltd. All rights reserved.