Fatty acid composition ofThalictrum L. seed oils

Abstract

The fatty acid composition of five representatives of the Thalictrum L. genus of the plant family Ranunculaceae has been investigated. The fatty acids include mainly acids with double bonds in the trans-5 position (about 60%). Although the main component of the fatty acids is a triene acid (trans-5,cis-9, cis-12-octadecatrienoic acid), the oils investigated are semidrying.

Fatty Acids of Thalictrum revolutum Fruit Lipid

“…The major components were octadeca-trans-5, cis-9, cis-12 trienoic and octadec-trans-5-enoic acids, each being about 30%. This trienoic acid (5t, 9c, 12c) was found in this study to be less in amount than reported in earlier studies for other Thalictrum species (1)(2)(3). Rankoff (3) found this acid to constitute ewer 40%.…”

“…When the solvent was removed on a rotary evaporator, a light green oil was obtained. Five grams of oil (10 parts by weight) was saponified (4) by refluxing with potassium hydroxide (3 parts by weight) in methanol (50 parts by volume) for 3 hours in an atmosphere of nitrogen gas. After saponification, the methanol was removed by distillation.…”

Fatty Acid Composition of Some Ranunculaceae Seed Oils

“…The four other species did not contain any fatty acids with a A5 or A6 double bond.Fatty acids with chain lenght of 2 0 -2 4 carbon atoms were determ inated in sig nificant am ount only in C. pubescens 9.5 % of total fatty acid of 20:1. Our results were in good agreem ent with those of literature (Aitzetmiiller andTsevegsiiren, 1993 and1994;Bagby et al, 1962;Ferlay et al, 1993;Kaufmann and Barve, 1965;Rankoff et al, 1971;Smith et al, 1968;Spen cer et al, 1970;Takagi et al, 1983;Tsvegsiiren and Aitzetmiiller, 1993;Ustun et al, 1990;Viano and Gaydou, 1984;Vioque et al, 1994;Wu et al, 1980).…”

“…Fatty acid composition of twenty eight species seed oils have been already reported (Bagby et al, 1962;Ferlay et al, 1993;Kaufmann and Barve, 1965;Rankoff et al, 1971;Smith et al, 1968;Spen cer et al, 1970;Takagi et al, 1983;Tsevegsüren and Aitzetmtiller, 1993;Ustun et al, 1990;Viano and Gaydou, 1984;Vioque et al, 1994;Wu et al, 1980). Among these, six species belonging to the genus A nem one displayed fair amounts of gammalinolenic acid (G L A ) or cis-6,cis-9,cis-12 18:3, in their lipids (Smith et al, 1968, Tsevegsüren andAitzetm üller, 1993).…”

Screening of seed lipids for γ‐linolenic acid: Capillary gas‐liquid chromatographic separation of 18:3 fatty acids with Δ5 and Δ6 double bonds

“…However, in the Ranunculaceae and in a number of other plant families, seed oils have been found that contain smaller or larger percentages of AS-18:3 acids (Smith, 1970;Takagi and Itabashi, 1982;Takagi et al, 1983). The most prominent of these is columbinic acid ( 5 t ,9c, 12~-18:3;Cb) in Aquilegiu (Kaufmann and Barve,196.5) and Thalictrum (Rankoff et al, 1971;Wu et al, 1980), two genera of the Ranunculaceae. In these species, all the A5 acids found apparently have the trans configuration.…”