1999
DOI: 10.1007/s11745-999-0433-1
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Δ5‐Olefinic acids in the seed lipids from four Ephedra species and their distribution between the α and β positions of triacylglycerols. Characteristics common to coniferophytes and cycadophytes

Abstract: The fatty acid compositions of the seed lipids from four Ephedra species, E. nevadensis, E. viridis, E. przewalskii, and E. gerardiana (four gymnosperm species belonging to the Cycadophytes), have been established with an emphasis on delta5-unsaturated polymethylene-interrupted fatty acids (delta5-UPIFA). Mass spectrometry of the picolinyl ester derivatives allowed characterization of 5,9- and 5,11-18:2; 5,9,12-18:3; 5,9,12,15-18:4; 5,11-20:2; 5,11,14-20:3; and 5,11,14,17-20:4 acids. Delta5-UPIFA with a delta1… Show more

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Cited by 34 publications
(48 citation statements)
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“…On the contrary, they are the rule. This was observed in earlier and more recent systematic studies of gymnosperm leaf [28,29] and seed lipids [30], and for the latter, extended to practically all species analysed so far (approximately 170 species analysed by author Wolff and co-workers [26,27,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]). They also occur in wood [47][48][49][50][51][52] lipids, but the number of species analysed for these tissues is much more limited.…”
Section: ∆ ∆5-upifa Are Usual Components Of Gymnosperm Lipidssupporting
confidence: 56%
“…On the contrary, they are the rule. This was observed in earlier and more recent systematic studies of gymnosperm leaf [28,29] and seed lipids [30], and for the latter, extended to practically all species analysed so far (approximately 170 species analysed by author Wolff and co-workers [26,27,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]). They also occur in wood [47][48][49][50][51][52] lipids, but the number of species analysed for these tissues is much more limited.…”
Section: ∆ ∆5-upifa Are Usual Components Of Gymnosperm Lipidssupporting
confidence: 56%
“…Article disponible sur le site http://www.ocl-journal.org ou http://dx.doi.org/10.1051/ocl.2000.0113 Arachidonic (5,8,11,[14][15][16][17][18][19][20] and eicosapentaenoic (5,8,11,14,17-20:5) acids are the classic essential fatty acids in animals that otherwise have not yet been characterized with certainty in spermaphytes (seed plants) [1]. At most, a few angiosperm species can synthesize their more immediate precursors gamma-linolenic (6,9,12-18:3) and stearidonic (6,9,12,15-18:4) acids from linoleic (9,12-18:2) and alpha-linolenic (9,12,15-18:3) acids, respectively, but they cannot further process these fatty acids.…”
Section: Mots-clésmentioning
confidence: 99%
“…These fatty acids occur in the seeds from all Coniferophyte families studied so far, encompassing approximately 180 species [3][4][5][6] (almost one-fourth of extant species). Known exceptions that do not contain DELTA5-UPIFA belong to the Cycadophytes [10,11]. Sciadonic acid (a C20 DELTA5-UPIFA), in particular, is a constant lipid component in the seed and leaf lipids of gymnosperms containing DELTA5-UPIFA [12], whereas the presence of other DELTA5-UPIFA (in particular C18 DELTA5-UPIFA) is much more variable.…”
Section: Articlementioning
confidence: 99%
“…It was later used by the Chinese to treat asthma [196] and acute nephritis [197]. This plant contains alkaloids [198], amino acids, proteins [199], tannins and fatty acids [200]. The volatile oil of Ephedra fragilis contains (E)-phytol (10.1%), pentacosane (5.2%), 6,10,14-trimethyl-2-pentadecanone (5.3%), cis-thujopsene (3.5%), and α-terpineol (3.0%) as the major components [201].…”
Section: Ephedra Fragilis Desfmentioning
confidence: 99%