Alterations in fatty acid composition during the metamorphosis of Hyalophora cecropia: correlations with juvenile hormone titre.

@article{Stephen1970AlterationsIF,
  title={Alterations in fatty acid composition during the metamorphosis of Hyalophora cecropia: correlations with juvenile hormone titre.},
  author={William F. Stephen and Lawrence I. Gilbert},
  journal={Journal of insect physiology},
  year={1970},
  volume={16 5},
  pages={
          851-64
        }
}
Abstract Gas chromatographic analyses of the total fatty acids of whole animals during development revealed that palmitic and stearic acids are always present in lower concentrations than their unsaturated homologues while both oleic and linolenic acid concentrations exceed that of linoleic acid. This also holds true for the neutral lipid fraction but the phospholipids possess a higher concentration of stearic acid. During late pharate adult development there are increases in the relative… Expand
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The fatty acid composition of fat body and haemolymph lipids in Hyalophora cecropia and its relation to lipid release.
TLDR
In vitro experiments revealed that most of the fatty acids released from the fat body into the haemolymph are in the diglyceride fraction, regardless of developmental stage, and a two-compartment theory is presented that favours the latter alternative. Expand
The Role of Lipid in Adult Development and Flight-Muscle Metabolism in Hyalophora Cecropia
TLDR
It is shown that female pupae of H. cecropia begin to catabolize lipid early in adult development, and a fatty acid oxidizing system has been identified in flight muscle which requires ATP, magnesium and a citric acid cycle intermediate for optimum activity. Expand
Fatty acid biosynthesis in the silkmoth, Hyalophora cecropia
TLDR
Gas chromatographic and mass spectrographic analysis established that the six major fatty acids of Hyalophora cecropia are palmitic, palmitoic, stearic, oleic, linoleic, and linolenic acids, and that no insect has been shown to synthesize polyenoic acids or can synthesize monoenoic acids other than by direct desaturation of existing or newly synthesized saturated fatty acids. Expand
Changes in lipid content during the reproductive cycle of Leucophaea maderae and effects of the juvenile hormone on lipid metabolism in vitro
TLDR
In vitro studies with active corpora allata suggest that the juvenile hormone may act to depress the lipid synthetic ability of the fat body at this stage and thus make more substrate available to the developing oocytes. Expand
STUDIES ON THE INTERCONVERSION OF CARBOHYDRATE AND FATTY ACID IN HYALOPHORA CECROPIA.
TLDR
There was no appreciable difference in the incorporation or the breakdown of palmitate, acetate, or glucose between male and female except that the incorporation of C 14 -glucose into glycogen in the female exceeded that in the male during later developmental stages. Expand
Intermediary metabolism in aseptically reared blowfly larvae, Calliphora erythrocephala (Meig.). II. Biosynthesis of fatty acids and amino acids.
TLDR
The results of these experiments showed that in this insect saturated and unsaturated fatty acids are not interconvertible by hydrogenation and dehydrogenation and that their biosynthesis takes place by two separate pathways. Expand
The content of juvenile hormone and lipid in Lepidoptera: sexual differences and developmental changes.
TLDR
Alterations in juvenile hormone titer were consistent with the present understanding of the endocrine control of insect metamorphosis and revealed that the male Cecropia utilizes little if any net lipid during the pupal-adult transformation, but uses lipid rapidly as a flight fuel during adult life. Expand
Phospholipid synthesis during flight muscle development in the American silkmoth Hyalophora cecropia.
TLDR
Radioisotope and chemical studies indicate the synthesis of phospholipids during adult development of Hyalophora cecropia and more closely approximates that of beef heart mitochondria than that of housefly flight muscle sarcosomes. Expand
LIPID RELEASE AND TRANSPORT IN INSECTS.
TLDR
Diglyceride-protein complex seems to be the most likely form by which long-chain fatty acids are transported in the insects studied, and the greatest rate of release of diglyceride was observed from adult silkmoth fat body, andthe lowest from diapausing pupal fat body. Expand
Lipid Metabolism and Function in Insects
TLDR
This chapter concentrates on developments within the past ten years but also discusses older literature when applicable to the historical development of the topic. Expand
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