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Storage lipid formation in seeds

Published online by Cambridge University Press:  19 September 2008

Denis J. Murphy ,
Stephen Rawsthorne  and
Matthew J. Hills
Denis J. Murphy*
Affiliation:
Department of Brassica & Oilseeds Research, John Innes Centre, Colney, Norwich NR4 7UH, UK
Stephen Rawsthorne
Affiliation:
Department of Brassica & Oilseeds Research, John Innes Centre, Colney, Norwich NR4 7UH, UK
Matthew J. Hills
Affiliation:
Department of Brassica & Oilseeds Research, John Innes Centre, Colney, Norwich NR4 7UH, UK
*
* Correspondence
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Abstract

The mechanisms and regulation of storage lipid formation in seeds are reviewed. Seed storage lipids are ultimately derived from simple carbon compounds, such as sucrose, which are imported into seeds from source tissues, such as leaves or pods. The partitioning of this important carbon towards storage lipid, carbohydrate or protein is regulated by a complex interaction between genetically-determined endogenous factors and external environmental influences. Storage lipids are synthesized from fatty acids, derived from acetyl-CoA, and glycerol 3-phosphate. Fatty acid biosynthesis and probably acetyl-CoA formation, occurs within the plastids to produce oleoyl-CoA. Further elaboration of oleoyl-CoA to produce polyunsaturates, hydroxylates or very long chain acyl-CoAs occurs on the endoplasmic reticulum, as does the esterification of acyl-CoAs to glycerol-3-phosphate to produce the final triacylglycerol storage oil. The temporal and hormonal regulation of storage lipid accumulation in seeds is discussed.

Keywords

Fatty acidsoil bodiesoilseedspartitioningstorage lipidtriacylglycerols
Type
Review Article
Information
Seed Science Research , Volume 3 , Issue 2 , June 1993 , pp. 79 - 95
Copyright
Copyright © Cambridge University Press 1993

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