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KMID : 0368419880310030187
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Journal of Plant Biology
1988 Volume.31 No. 3 p.187 ~ p.196
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Effects of the Nitrate and Phosphate Starvation on the Biosynthesis of Phospholipid and the Composition of Fatty Acids in Chlorella Chloroplasts
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Lee Jeom-Kyu
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Abstract
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Chlorella ellipsoidea were cultured in "cold" media starvated with the nitrate and phosphate sources. The effects of the nitrate and phosphate starvation on the biosynthesis of phospholipid and the composition of fatty acids in chloroplasts isolated from these cells were analyzed.
The syntheses of phosphatidylcholine and phosphatidylinositol in the nitrate and phosphate starvation were similarly inhibited as compared with the control but phosphatidyle-thanolamine synthesis in the nitrate starvation was extremely lower than that in the phosphate starvation. The major fatty acids utilized in phospholipid formation within chloroplasts were palmitic acid and linolenic acid. However, palmitic acid and stearic acid were dominant in the condition of the nitrate starvation. The levels of palmitic acid in the phosphate starvation were predominant and availability of palmitic acid were enhanced 3-fold than that of the control. These results suggest that the biosynthesis of phospholipid and the composition of fatty acids were affected by the nitrate and phosphate starvation in the culture media.
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