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Sterols and fatty acids of a whisk fern Psilotum nudum
Author(s) -
Akihisa Toshihiro,
Kawashima Takeshi,
Takahashi Shushichi,
Sahashi Norio,
Okamoto Takahisa,
Niiya Isao,
Tamura Toshitake
Publication year - 1992
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/bf02637687
Subject(s) - fern , degree of unsaturation , fatty acid , biology , sterol , chemistry , botany , biochemistry , chromatography , cholesterol
The sterols and fatty acids of Psilotum nudum were investigated. The 4,4‐dimethyl‐ and 4α‐methylsterol fractions contained 24β‐methyl‐Δ 25 ‐unsaturated sterols, viz. , cyclolaudenol and 24β‐methyl‐25‐dehydrolophenol, respectively, as dominant sterols among the other components common in vascular plants. 24‐Methylcholesterol (mixture of C‐24 epimers) and sitosterol constituted the dominant sterols in the 4‐demethylsterol fraction. This is the first identification of 24‐methylene‐5α‐lanost‐8‐en‐3β‐ol, 24β‐methyl‐25‐dehydrolophenol, codisterol, isofucosterol, 24‐methylene‐25‐methylcholesterol and avenasterol in a fern. The major fatty acids were 16:0, 18:1, 18:2, 18:3 and 20:3. In addition, several C 20 fatty acids with various unsaturation were found to be present in low concentrations.