Gamma-linolenic acid from fourteen boraginaceae species

Guil‐Guerrero, José Luis; Garcı́a-Maroto, Federico; Vilches-Ferrón, M.; Alonso, Diego López

doi:10.1016/s0926-6690(03)00036-0

Cited by 34 publications

(15 citation statements)

References 12 publications

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“…(2009) is involved in the synthesis of polyunsaturated fatty acids, such as acid γ-linoleic (GLA, 18:3 n-6). A survey of the fatty acid composition in Echium seeds revealed that the Macaronesian endemic species contain an unusually high level of GLA which could have represented a selective advantage during adaptation to the island's environments (Guil-Guerrero & al., 2003). Moreover, Gunstone (1992) concluded that ecological factors, such as soil type and temperature, can affect the contents of fatty acids (including GLA) in the seeds of Boraginaceae.…”

Section: Discussionmentioning

confidence: 99%

Origin and diversification of the genus Echium (Boraginaceae) in the Cape Verde archipelago

Romeiras

Paulo

Duarte

et al. 2011

TAXON

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Much work has been done on the endemic floras of Madeira and the Canary Islands but little is known about the origin and diversification of endemic plants of the Cape Verde archipelago. In this study we focus on the three endemic species of the genus Echium L. (Boraginaceae) in Cape Verde. Phylogenetic analyses based on nuclear (ITS1, ITS2) and plastid (trnT‐L, trnL‐F, rps16, psaI‐accd) DNA markers produced similar topologies that suggest a recent single colonization event in the Cape Verde archipelago, with subsequent diversification during the Pleistocene (<1.8 Ma). All datasets recovered a split between the "southern" (E. hypertropicum, E. vulcanorum) and "northern" (E. stenosiphon s.l.) island species, and suggest that habitat adaptation and inter‐island colonization played a prominent role in the evolution of Echium in Cape Verde. Implications of the results are discussed in the context of the biogeography of the Macaronesian Islands. The northern island species are classified into three distinct subspecies, one for each of the northern islands: E. stenosiphon subsp. stenosiphon endemic to São Vicente, subsp. lindbergii endemic to Santo Antão, and subsp. glabrescens endemic to São Nicolau.

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Section: Discussionmentioning

confidence: 99%

Origin and diversification of the genus Echium (Boraginaceae) in the Cape Verde archipelago

Romeiras

Paulo

Duarte

et al. 2011

TAXON

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“…A particular focus has been placed on the role of glinolenic and stearidonic acids. To date, it has been established that oils obtained from the seeds of evening primrose, borage and blackcurrant are rich in g-linolenic acid; however, they contain only very small amounts of stearidonic acid [1][2][3][4]. In this regard, the seeds of viper bugloss are exceptional as they contain almost 11% g-linolenic acid and about 13% stearidonic acid [5].…”

Section: Introductionmentioning

confidence: 99%

Triacylglycerols from viper bugloss (Echium vulgare L.) seed bio‐oil

Czaplicki

Zadernowski

Ogrodowska

2009

Euro J Lipid Sci & Tech

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Triacylglycerols (TAG) in viper bugloss oil were isolated from raw pressed oil by silicic acid column chromatography. The obtained blend of TAG was separated by silver ion thin-layer chromatography (TLC Ag 1 ) into nine fractions, varying in terms of unsaturation level and molecular polarity. The composition of TAG in viper bugloss oil was determined by HPLC coupled with a diode-array detector and an evaporative light-scattering detector. The results showed that the first three fractions were combinations of TAG containing palmitic, oleic and linoleic acids. Fractions 4 and 6 contained TAG of a similar acid composition as above, but with the addition of g-linolenic acid. The remaining fractions (7-9) were the most varied in acid composition. They were found to contain 26-39% palmitic acid, 12-15% oleic acid, 13-41% linoleic acid 8-24% g-linolenic acid, 1.5-5.5% a-linolenic acid and 1-5% stearidonic acid. The analysis of fatty acid allocation in TAG of viper bugloss lipids revealed that linoleic acid (ranging from 2 to 100%) was the only acid found in all isolated fractions. In the investigated oil, the predominant TAG included: LnLnG (11.38%), LnLnSt (11.17%), LnGSt (7.71%), LnStSt (6.19%) and LnLnLn (5.44%). Almost 86% of the TAG contained a-linolenic acid, while g-linolenic and stearidonic acids amounted to 49 and 38%, respectively.

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“…Taking into account the commercial interest in GLA and SDA oils for human nutrition, and that they constitute a raw material to obtain pure GLA and/or SDA, new sources of these acids have been recently reported. Among these are Macaronesian Echium seed oils [5][6][7], new findings in species from several botanical families that are traditional sources of GLA [8,9], and Caryophyllaceae seed oils [10]. These reports have been added to the older literature included in the SOFA (seed oil fatty acids) database (http:// www.bagkf.de/sofa), which contains more than 200 other occurrences for GLA in Boraginacae.…”

Section: Introductionmentioning

confidence: 99%

Gamma‐linolenic and stearidonic acids from Moroccan Boraginaceae

Guil‐Guerrero

López‐Martínez

Mercado

et al. 2006

Eur. J. Lipid Sci. Technol.

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Seeds from 20 species belonging to Boraginaceae, subfamilies Boraginoideae and Heliotropioideae, were surveyed in a search for new sources of g-linolenic acid (GLA) and stearidonic acid (SDA). Seed oil content ranged from 7.5% in Echium humile ssp. pycnanthum to 28.8% in Anchusa undulata. GLA ranged from 0.2% of total fatty acids in Heliotropium undulatum to 20.2% in Lithodora maroccana. This last species may be considered as new source of GLA. GLA content was also tested in other Lithodora species from the south east of Spain, to compare GLA percentages among related taxa. GLA amounts in all Echium species reached approximately 12%, in good agreement with previous findings in other European Echium species. SDA ranged from an absence in several Cynoglossum species to 16.2% in Echium humile ssp. pycnanthum, which may be considered as a new source of this fatty acid.

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Gamma-linolenic acid from fourteen boraginaceae species

Cited by 34 publications

References 12 publications

Origin and diversification of the genus Echium (Boraginaceae) in the Cape Verde archipelago

Origin and diversification of the genus Echium (Boraginaceae) in the Cape Verde archipelago

Triacylglycerols from viper bugloss (Echium vulgare L.) seed bio‐oil

Gamma‐linolenic and stearidonic acids from Moroccan Boraginaceae

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