当前位置: X-MOL 学术J. Insect Physiol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The extremely low energy cost of biosynthesis in holometabolous insect larvae.
Journal of Insect Physiology ( IF 2.3 ) Pub Date : 2019-11-28 , DOI: 10.1016/j.jinsphys.2019.103988
N Ferral 1 , N Gomez 1 , K Holloway 1 , H Neeter 1 , M Fairfield 1 , K Pollman 1 , Y-W Huang 1 , C Hou 1
Affiliation  

The metabolic cost of growth, which quantifies the amount of energy required to synthesize a unit of biomass, is an important component of an animal's ontogenetic energy budget. Here we investigated this quantity as well as other energy budget variables of the larvae of a holometabolous insect species, Vanessa cardui (painted lady). We found that the high growth rate of this caterpillar cannot be explained by its metabolic rate and the percentage of the metabolic energy allocated to growth; the key to understanding its fast growth is the extremely low cost of growth, 336 Joules/gram of dry mass. The metabolic cost of growth in caterpillars is 15-65 times lower than that of the endothermic and ectothermic species investigated in previous studies. Our results suggest that the low cost cannot be attributed to its body composition, diet composition, or body size. To explain the "cheap price" of growth in caterpillars, we assumed that a high metabolic cost for biosynthesis resulted in a high "quality" of cells, which have fewer errors during biosynthesis and higher resistance to stressors. Considering the life history of the caterpillars, i.e., tissue disintegration during metamorphosis and a short developmental period and lifespan, we hypothesized that an energy budget that allocates a large amount of energy to biosynthesizing high quality cells would be selected against in this species. As a preliminary test of this hypothesis, we estimated the metabolic cost of growth in larvae of Manduca sexta (tobacco hornworm) and nymphs of Blatta lateralis (Turkestan cockroach). The preliminary data supported our hypothesis.

中文翻译:

整体代谢昆虫幼虫的生物合成能耗极低。

生长的代谢成本量化了合成单位生物量所需的能量,是动物个体发育能量预算的重要组成部分。在这里,我们研究了全代谢昆虫物种Vanessa cardui(彩绘女士)的幼虫的数量以及其他能量收支变量。我们发现,这种毛虫的高生长率不能用其代谢率和分配给生长的代谢能的百分比来解释。了解其快速生长的关键是极低的生长成本,即336焦耳/克干物质。毛虫生长的代谢成本比以前研究中研究的吸热和吸热物种的代谢成本低15-65倍。我们的结果表明,低成本不能归因于其身体成分,饮食组成或体型。为了解释毛虫生长的“便宜价”,我们假设生物合成的新陈代谢成本高导致细胞的“质量”高,其在生物合成过程中具有较少的错误,并且对应激源的抵抗力更高。考虑到毛毛虫的生活史,即变态过程中的组织崩解以及较短的发育时期和寿命,我们假设在该物种中将选择为生物合成高品质细胞分配大量能量的能量预算。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。我们认为生物合成的新陈代谢成本高会导致细胞的“质量”高,而细胞在生物合成过程中的错误较少,并且对应激源的抵抗力更高。考虑到毛毛虫的生活史,即变态过程中的组织崩解以及较短的发育时期和寿命,我们假设在该物种中将选择为生物合成高品质细胞分配大量能量的能量预算。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。我们认为生物合成的新陈代谢成本高会导致细胞的“质量”高,而细胞在生物合成过程中的错误较少,并且对应激源的抵抗力更高。考虑到毛毛虫的生活史,即变态过程中的组织崩解以及较短的发育时期和寿命,我们假设在该物种中将选择为生物合成高品质细胞分配大量能量的能量预算。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。考虑到毛毛虫的生活史,即变态过程中的组织崩解以及较短的发育时期和寿命,我们假设在该物种中将选择为生物合成高品质细胞分配大量能量的能量预算。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。考虑到毛毛虫的生活史,即变态过程中的组织崩解以及较短的发育时期和寿命,我们假设在该物种中将选择为生物合成高品质细胞分配大量能量的能量预算。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。作为对该假设的初步检验,我们估算了曼杜卡(Manduca sexta)(烟草天蛾)幼虫和布拉达侧耳(Turkestan蟑螂)若虫的生长的代谢成本。初步数据支持我们的假设。
更新日期:2019-11-01
down
wechat
bug