Changes in growth and developmental timing in Manduca sexta when exposed to altered oxygen levels.

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY Arthropod Structure & Development Pub Date : 2022-12-24 DOI:10.2139/ssrn.4217283
S. Wilmsen, E. Dzialowski
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Abstract

The effect of chronic oxygen exposure on growth and development of insects is an active field of research. It seeks to unravel the triggers and limitations to molting and growth across many insect groups, although even now there are gaps in our knowledge and inconsistencies that need to be addressed. The oxygen dependent induction of molting (ODIM) hypothesis states that the impetus for molting is triggered by the development of hypoxic tissue due to the rapid increase in mass coupled with the fixed nature of tracheal systems between molts. In this study, we raised Manduca sexta in three chronic oxygen treatments (10, 21, & 30% O2). We measured the mass of these insects throughout their larval development and as adults. We found that both hyperoxia and hypoxia had marked effects on size and developmental times. Hyperoxia exposure resulted in increased mass throughout development and into adulthood while increasing developmental times. Hypoxia also increased developmental time and decreased mass of adult moths. We show that pupation is a critical window for exposure to altered oxygen levels. This suggests that oxygen may play a role in affecting the timing of eclosion at the end of pupation.
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当暴露于改变的氧气水平时,六角曼杜卡生长和发育时间的变化。
慢性氧暴露对昆虫生长发育的影响是一个活跃的研究领域。它试图揭示许多昆虫群体的蜕皮和生长的触发因素和限制因素,尽管即使现在我们的知识也存在空白和不一致性需要解决。氧依赖诱导蜕皮(ODIM)假说指出,蜕皮的动力是由低氧组织的发展引发的,这是由于质量的迅速增加,加上蜕皮之间气管系统的固定性质。在这项研究中,我们在三种慢性氧处理(10%、21%和30% O2)下饲养了Manduca sexta。我们测量了这些昆虫在幼虫发育和成虫期间的质量。我们发现高氧和低氧对大小和发育时间都有显著的影响。高氧暴露导致在整个发育过程和成年期体重增加,同时延长发育时间。缺氧还能延长成蛾的发育时间,降低成蛾的质量。我们表明,化蛹是暴露于改变的氧气水平的关键窗口。这表明,在化蛹结束时,氧气可能在影响羽化时间方面起作用。
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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
期刊介绍: Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.
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