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Sterol lipids in finger millet (Eleusine coracana)
Author(s) -
Mahadevappa V. G.,
Raina P. L.
Publication year - 1978
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02682451
Subject(s) - sterol , eleusine , stigmasterol , chemistry , glycolipid , sugar , chromatography , glycoside , iodine value , cholesterol , thin layer chromatography , food science , phytosterol , biochemistry , botany , biology , stereochemistry , finger millet , agronomy
Neutral lipids, glycolipids, and phospholipids (1.3%, 0.25%, and 0.10% of seed weight) were isolated from the total lipids (chloroform‐methanol) of finger millet seeds (Eleusine coracana) , and four sterol‐containing lipids further isolated from neutral and glycolipids by preparative column and thin layer chromatography. On seed weight, these comprised: free sterols (S) 0.091%, sterol esters (SE) 0.013%, sterol glycosides (SG) 0.025%, acyl sterol glycosides (ASG) 0.020%, and total 0.149%. The major fatty acids, totaling 85–90%, were the same in both esterified sterols, but the proportions varied: 16:0, 18:1, and 18:2 comprising 24, 49, and 17% in SE (calculated iodine value 75) and 43, 36, and 7% in ASG (calculated iodine value 46). All four sterol lipids contained 80–84% of β‐sitosterol, the remainder being stigmasterol. The only sugar in SG and ASG was D‐glucose. It is deduced that the major representative species are: SE, β‐sitosterol oleate/palmitate; SG, β‐D‐glucopyranosyl‐(l → 3)‐β‐sitosterol; and ASG, 6–0‐palmitoyl‐β‐D‐glucopyranosyl‐(l → 3)‐β‐sitosterol.