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Utilization of pre-existing energy stores of female Aedes aegypti mosquitoes during the first gonotrophic cycle

生物 糖原 埃及伊蚊 油酸 血粉 氨基酸 生物化学 幼虫 餐食 新陈代谢 碳水化合物 食品科学 植物
作者
Guoli Zhou,James E. Pennington,Michael A. Wells
出处
期刊:Insect Biochemistry and Molecular Biology [Elsevier]
卷期号:34 (9): 919-925 被引量:70
标识
DOI:10.1016/j.ibmb.2004.05.009
摘要

Pre-existing energy reserves may play an important role in regulating the utilization of blood meal proteins in female anautogenous mosquitoes. Determining the fate of reserves derived from the sugar meal and larval food during the first gonotrophic cycle would help to elucidate the relative contributions of larval and adult nutrition to survival and reproduction. We measured the allocation of pre-blood-meal reserves to egg production or energy production during the first gonotrophic cycle by using [14C]-labeled female Aedes aegypti mosquitoes. Feeding adults [3,4-14C]-glucose labeled the glycogen and sugar stores (~50%), lipid stores (~25%), and protein and amino acid stores (~25%). During the first gonotrophic cycle, about 60% of the glycogen and sugar stores were metabolized and all were used for energy production. About 33% of the labeled protein and 72% of the labeled amino acid stores were metabolized, with about 9% being transferred to the eggs and the rest oxidized. About 30% of the lipid was metabolized, with about 65% being transferred to the eggs and the rest oxidized. Feeding [1-14C]-oleic acid to larvae effectively labeled adult lipid stores with about 75% of the label in lipid stores and 16% in proteins and 6% in glycogen. During the first gonotrophic cycle, about 35% of the labeled lipid stores were metabolized, with equal amounts being oxidized and transferred to the eggs. None of the other maternal stores labeled by fatty acid were metabolized during the first gonotrophic cycle. These results show that carbohydrate reserves are a critical source of energy during the first gonotrophic cycle, while lipid reserves are used equally for energy production and provisioning the eggs.
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