PMID: 11607584Oct 24, 1995Paper

Pathway of terpene excretion by the appendix of Sauromatum guttatum

Proceedings of the National Academy of Sciences of the United States of America
H SkubatzB J Meeuse

Abstract

Electron microscopy of the cells of the thermogenic appendix of Sauromatum guttatum has revealed a fusion event between pocket-like structures of the rough endoplasmic reticulum (rER) and the plasma membrane. As a result of the fusion event, many regions of the plasma membrane have paired unit membranes (four leaflets instead of two). The fusion allows the transfer of osmiophilic material from the rER pockets to the plasma membrane, where the osmiophilic material is confined to bilayer, pocket-like structures. A clear correlation is found between the presence of the osmiophilic compound and sesquiterpenes. Prior to heat production, the rER- and plasma-membrane pockets are electron dense, and sesquiterpenes are detectable only in tissue extracts. On the day of heat production, electron-translucent pockets are subsequently found and the stored sesquiterpenes are released to the atmosphere. Three sesquiterpenes have been identified by gas chromatography-mass spectrometry as alpha-copaene and beta- and alpha-caryophyllene.

References

Aug 1, 1990·Current Opinion in Cell Biology·D J Bowles

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Citations

Apr 21, 1999·Progress in Lipid Research·P MoreauC Cassagne
Dec 3, 2014·Metabolic Engineering·Ling Yuan, Erich Grotewold
Jan 10, 2017·Annals of Botany·Patrícia Gonçalves-SouzaElder Antônio Sousa Paiva

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