关于昆虫不连续气体交换循环（DGC）的假说。
Hypotheses regarding the discontinuous gas exchange cycle (DGC) of insects.
作者信息
Contreras Heidy L, Heinrich Erica C, Bradley Timothy J
机构信息
Biology Department, University of La Verne, 1950 3rd Street, La Verne, CA 91750, United States.
Department of Ecology & Evolutionary Biology, University of California, Irvine, CA 92697-2525, United States.
出版信息
Curr Opin Insect Sci. 2014 Oct;4:48-53. doi: 10.1016/j.cois.2014.08.008. Epub 2014 Aug 20.
The evolutionary origin of the insect respiratory pattern referred to as the discontinuous gas exchange cycle (DGC) has been a topic of extensive discussion among insect physiologists for at least 50 years. This pattern has often been thought to reduce respiratory water loss (RWL). However, because this pattern does not consistently conserve water among all taxa, other hypotheses have been proposed to try and explain the significance of the DGC. In this review we briefly describe the different hypotheses postulated to date. We conclude that the DGC is primarily a respiratory pattern deriving from the simultaneous regulation of O and CO. It may nonetheless have additional adaptive functions in insects.
被称为间断性气体交换循环（DGC）的昆虫呼吸模式的进化起源，至少在50年来一直是昆虫生理学家广泛讨论的话题。这种模式常被认为能减少呼吸水分流失（RWL）。然而，由于这种模式并非在所有分类群中都能持续节水，因此人们提出了其他假说来试图解释DGC的意义。在本综述中，我们简要描述了迄今为止提出的不同假说。我们得出的结论是，DGC主要是一种源于对氧气和二氧化碳同时调节的呼吸模式。不过，它在昆虫中可能还有其他适应性功能。
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