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Plant and Cell Physiology, 1995, Vol. 36, No. 8 1607-1611
© 1995

Polyunsaturated Fatty Acids and Betaine Lipids from Pavlova lutheri

Misako Kato1, Kyoko Hajiro-Nakanishi, Hiroshi Sano and Shigetoh Miyachi

Marine Biotechnology Institute, Shimizu Laboratories Sodeshi 1900, Shimizu-shi, Shizuoka, 424 Japan
1 Department of Biology, Faculty of Science, Ochanomizu University Present address: Otsuka, Tokyo, 112 Japan

The polar lipids and fatty acids of the microalgae Pavlova lutheri were analyzed. The principal polar lipid components were monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG), sulfoquinovosyldiacylglycerol (SQDG), 1,2-diacylglyceryl-O-2'-hydroxymethyl-(N,N,N-trimethyl)-rß-alanine (DGTA) and 1,2-diacylglyceryl-3-O-carboxyhydroxymethylcholine (DGCC). Each polar lipid had a different set of combinations of fatty acids, the most characteristic feature being the localization of polyunsaturated fatty acids in the betaine lipids. The percentages of polyunsaturated fatty acids in DGTA and DGCC were 70% and 50%, respectively, and these fatty acids were localized at the C-2 position in the betaine lipids. An analysis of the incorporation of 14C-labelled compounds into the algal cells indicated the involvement of DGCC in acyl exchange.

(Received October 17, 1994; Accepted October 2, 1995)
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