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KMID : 0903519860290040366
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1986 Volume.29 No. 4 p.366 ~ p.371
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Effect of High Temperature and Growth Light Intensity on Fatty Acid Composition of Panax ginseng leaf
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Abstract
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Fatty acid compositions of Panax ginseng leaves (6 year) grown under different light intensity in field and of the detached leaves exposed to high temperature(20 hours) were investigated by gas chromatography. Linoleic, linolenic, palmitic and palmitoleic acid were the major components(80%) of leaf lipid. The higher the growth light intensity, the lower the percentage of unsaturated acids or bonds, indicating metabolic adaptation to high temperature. Pattern similarity of fatty acid composition was little changed until 20% light but significantly different at 30%, suggesting 20% as limitation light intensity. The close similarity of fatty acid composition between the leaves grown under 30% light and the one at harvest rises uncertainty between adaptation to high temperature and senescence. Total fatty acid content decreased with the increase of light intensity. Short term high temperature(25℃ or 35℃) increased total fatty acid content, unsaturated acid percentage and insignificant difference in pattern similarity of composition.
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