Studies on the Lipid Composition of Bush Clover (Lespedeza bicolor) Seed

싸리종자(Lespedeza bicolor)의 지질성분(脂質成分)에 관한 연구(硏究)

Lipids in Bush Clover (Lespedza bicolor) seed were extracted with the mix ture of chloro-form-methanol (2 : 1, v/v) and then fractionated into neutral lipids, glycolipids and phospholipids by silicic acid column chromatography. Components and fatty acid composition of each fraction were determined by thin layer and gas chromatographies. The results were summarized as follows. In Bush Clover seed, the contents of neutral lipids, glycolipids and phospholipids were 71.75%, 23.26% and 4.99% respectively. Triglycerides(61.90%) and free fatty acids(22.04%) were the major components among the neutral lipids. Esterified sterols, free sterols, diglycerides and monoglycerides were the minor components. The major components of glycolipids were monogalactosyl diglycerides(38.19%) the others were esterified steryl glycosides, cerebrosides and digalactosyl diglycerides. The major components of the phospholipids were phosphatidyl cholines(36.46%), phosphatidyl inositols(21.52%) and phosphatidyl ethanolamines(17.29%). The major fatty acid of total lipid, neutral lipids and glycolipids were linoleic acid, linolenic acid, oleic acid and palmitic acid. On the other hand, predominate fatty acid of phospholipids were linoleic acid, palmitic acid, linolenic acid and stearic acid.

싸리종자의 지질을 chlorform: methanol(2:1, v/v)로 추출한 후 중성지질, 당지질, 인지질로 분획한 다음 TLC와 GC로 분리, 정량하여 다음과 같은 결과를 얻었다. 1. 싸리종자의 일반성분은 수분이 11.60%, 조단백이 20.10%, 조지방이 15.25%, 당질이 48.92%, 회분이 4.13%로 나타났다. 2. 싸리종자의 지질은 중성지질이 71.75%, 당지질이 23.26%, 인지질이 4.99%였다. 3. 중성지질 중에는 triglyceride 61.9%, free fatty acid 22.04%가 주성분을 이루었고 그 외에 free sterol, esterified sterol, diglyceride, monoglyceride 지질 성분이 존재하였다. 4. 당지질 중에는 monogalactosyl diglyceride 38.19%의 함량이 가장 높았고 esterified steryl glycoside, steryl glycoside, digalactosyl diglyceride, cerebroside 등의 지질 성분이 비슷한 함량으로 존재하였다. 5. 인지질 중에는 phosphatidyl choline 36.46%, phosphatidyl inositol 21.52%, phosphatidyl ethanolamine 17.29%가 주성분이었고 lysophosphatidyl choline, phosphatidyl serine과 1가지 미확인 인지질 성분이 존재하였다. 6. 전지질의 주요 지방산은 linoleic acid 36.83%, linolenic acid 19.65%, oleic acid 11.25, palmitic acid 9.61%였고 중성지질의 주요 지방산은 linoleic acid 55.36%, linolenic acid 19.40%, oleic acid 12.47%, palmitic acid 9.81%였다. 당지질의 주요 지방산은 linoleic acid 53.26%, linolenic acid 18.67%, palmitic acid 12.20%, oleic acid 11.39%였다. 인지질의 주요 지방산은 linoleic acid 53.86%, palmitic acid 27.83%, linolenic acid 9.51%, stearic acid 5.00%로 전지질, 중성지질, 당지질의 지방산 조성 pattern과는 차이가 있었다.