馬齒種 6개 品種 옥수수의 總脂質, 中性脂質 및 極性脂質을 構成하는 脂質成分, 脂肪酸組成 그리고 總脂質의 sterol組成을 GLC, TLC, TLC-scanner 및 column chromatography를 利用하여 定量한 結果 다음과 같은 結論을 얻었다.
1) 옥수수의 總脂質은 3.7~5.3%의 含量分布를 보여 平均 4.7%였다.
2) 總脂質의 構成脂質成分은 TG, FFA, lanosterol. hydrocarbon & ES 그리고 PL & pigment를 含有하여, TG는 堤川玉과 黃玉3號에서 多少 높았다.
3) 總脂質의 脂肪酸組成은 linoleic, oleic 그리고 palmitic acid가 主成分을 이루고, 堤川玉에서는 linoleic acid가 가장 높은 반면에, oleic과 palmitic acid는 가장 낮게 나타났다.
4) 總脂質의 不감化物은 2.0~2.7%의 含量分布를 보였고, 晋州玉에서 多少 높게 나타났다.
4-desmethylsterol組成은 sitosterol, campesterol 그리고 stigmasterol이 主成分을 이루고, 晋州玉에서 sitosterol이 가장 높게 나타났다.
한편, 4-monomethylsterol組成은 obtusifoliol, gramisterol 그리고 citrostadienol이 主成分을 이루고, 光玉
과 晋州玉에서 obtusifoliol과 citrostadienol이 가장 낮게 나타났다.
5) 總脂質을 構成하는 中性脂質의 含量은 水原19號, 光玉, 橫城玉 그리고 晋州玉이 堤川玉과 黃玉3號보다 높게 나타났으며, 糖脂質과 燐脂質과 이와 反對 傾向을 보였다.
6) 中性脂質의 構成脂質成分은 TG, lanosterol, cholesterol, FFA 그리고 ES가 主成分을 이루고 있었다.
7) 中性脂質의 脂肪酸組成은 linoleic, oleic 그리고 palmitic acid가 主成分을 이루고, 水原19號와 堤川玉에서는 linoleic acid가 가장 높게 나타났다.
8) 糖脂質의 構成脂質成分은 MGS, MGC 그리고 MGDG를 含有하며, MGS와 MGC는 晋州玉에서 가장 높은 반면에, 橫城玉과 堤川玉에서는 가장 낮게 나타났다.
9) 糖脂質의 脂肪酸組成은 oleic, palmitic, linoleic 그리고 heptadecanoic acid가 主成分을 이루고, 晋州玉에서 oleic acid가 가장 높은 반면에 heptadecanoic acid는 가장 낮게 나타났고, 堤川玉에서는 이와 反對 傾向을 보였다.
10) 燐脂質의 構成脂質成分은 PI 및 PC를 含有하여, 橫城玉과 黃玉3號에서 PI가 가장 낮게 나타났다.
11) 燐脂質의 脂肪酸組成은 palmitic, heptadecanoic 그리고 oleic acid가 主成分을 이루고, 橫城玉에서 oleic acid가 가장 높은 반면에, heptadecanoic acid는 가장 낮게 나타났다.
This study dealt with the comparison of the individual lipid component and fatty acid composition in the six varieties of dent corn, Zea mays Indentata. The fatty acid and sterol compositions of the total lipid were analyzed by gas liquid chromatography. The total lipid was also fractionated into three lipid classes namely neutral, glyco and phospolipid by the methods of silicic acid column chromatography. The lipid components of lipid-classes were estimated by thin layer chromatography and TLC-scanner.
The contents of total lipid in six varieties of Cdent corn were 3.7~5.3%.
Total lipid were mainly composed of triglyceride(69.8~75.7%), free fatty acid(13.0~17.9%), lanosterol (4.8~6.0%). hydrocarbon & esterified sterol (3.5~6.0%), and polar lipid & pigment(2.7~5.9%). The contents of triglycerde in Chech'ŏnok and Hwangok No.3 were slightly higher then other varieties.
The major fatty acid in total lipid from six varieties of dent corn were chiefly consisted of linoleic(46.9~61.4%), oleic(21.9~29.9%) and palmitic acid(10.9~16.7%). Particularly the content of linoleic acid in Chech'ŏnok was higher but oleic and palmitic acid in Chech'ŏnok were less than other varieties.
The compositions of 4-desmethylsterol were mainly composed of siterol(44.0~63.2%), campestetel(11.6~15.5%) and stigmasterol(5.6~9.1%). The content of sitosterol in Chinjuok was higher than other varieties and isofucosterol was detected only in Chinjuok.
The compositions of 4-monomethlysterol were mainly composed of obtusifoliol(17.7~37.6%), gramisterol(15.0~27.0%) and citrostadienol(9.1~17.3%). The contents of obtusifoliol and citrostadienol in Kwangok and Chinjuok were less than other varieties.
The contents of fractionated neural lipid in Suwon No.19. Kwangok, Hoengsŏngok and Chinjuok(90.3~97.1%) were higher than those of Chech'ŏnok and Hwangok No.3(85.5~86.1%).
Neutral lipid were mainly composed of triglyceride (24.7~80.0%), lanosterol (6.2~20.2%), cholesterol (1.0~50.6%). free fatty acid(4.4~8.9%) and esterified sterol(1.5~15.9%).
The major fatty acid in neutral lipid from six varieties of dent corn were chiefly consisted of linoleic (26.2~55.4%), oleic(22.7~39.1%) and palmitic acid(11.4~41.6%). Particularly the contents of linoleic acid Suwon No.19 and Chech'ŏnok were higher but palmtic acid in Suwon No.19 and Chech'ŏnok were less than other varieties.
Glycolipd were mainly composed of monoglycosylsterol(17.5~56.4%), monoglycosylceramide(8.2~28.9%) and monoglycoslydiacylglycerol(12.4~22.2%). The contents of monoglycosylceramide and monoglycosylsterol in Chinjuok Were higher than other varieties.
The major fatty acid in glycolipid from six varieties of dent corn were chiefly consisted of oleic(14.6~39.3%), palmitic(20.0~26.1%), linoleic(3.6~26.9%) and heptadecanoic acid (3.3~24.7%). Particularly the cantents of oleic acid in Chinjuok and heptadecanoic acid in Chech'ŏnok were higher than other varieties.
Phospholipid were mainly composed of phosphatidylinositol(30.9~86.4%) and phosphatidylcholine(4.5~22.0%). The contents of phosphatidylinositol in Hoengsŏngok and Hwanngok No.3 were less than other varieties.
The major fatty acid in phospolipid from six varieties of dent corn chiefly consisted of palmitic(37.2~61.6%). heptadecanoic(9.2~31.8%) and oleic acid(4.3~17.2%). Particuiarly the content of oleic acid in ŏngok was higher but heptadecanoic acid in Hoengsŏngok was less than other varieties.