Abstract
Developing rice seeds rapidly accumulated storage lipids between 5 and 12 d after flowering. The contents of palmitic, oleic, and linoleic acids increased throughout seed development, while the α-linolenic acid content remained low. The activity of acyl-CoA synthetase varied coincidentally during the period of lipid accumulation, and rice seeds had a sufficient capacity to supply acyl-CoA substrates for TAG synthesis. Acyl-CoA synthetase showed a broad specificity for native FA of rice seeds except for stearic acid, and π electrons of a Δ9–Δ11 double bond in the C16−C18 acyl chains were required for its maximal activity.
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Abbreviations
- DAF:
-
days after flowering
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For comparison of chemical structures, FA in the figures are designated by number of carbon atoms:number of double bonds, followed by the position of double bonds and their geometrical configuration, \(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{c} is\) or \(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} rans\), such as 18∶2 9c, 12c for linoleic acid.
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Ichihara, K., Kobayashi, N. & Saito, K. Lipid synthesis and acyl-CoA synthetase in developing rice seeds. Lipids 38, 881–884 (2003). https://doi.org/10.1007/s11745-003-1139-0
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DOI: https://doi.org/10.1007/s11745-003-1139-0