Fatty Acids Profile of Alphitonia neocaledonica and Grevillea exul var. rubiginosa Seed Oils, Occurrence of an ω5 Series

Abstract

This is the first report of the chemical composition of Alphitonia neocaledonica (AN) and Grevillea exul var. rubiginosa (GER) seed oils. Using retention indices and gas chromatography-mass spectrometry, an unusual family of unsaturated x5-fatty acids has been identified. These include 14:1, 16:1, 18:1 and 20:1. Identification of the unsaturated fatty acids was confirmed by formation of DMOX derivatives which gave characteristic and easily interpreted mass spectra. DMDS adducts were used to identify the positions of double bonds in the monounsaturated fatty acids. The major fatty acids were 16:1x5 (45.6%) and 18:1x9 (20.9%) for GER and 18:2 (23.6%) and 18:3 (20.4%) for AN. The total x5-monoenes were 63.4 and 21.5% for GER and AN, respectively. The seed oils of AN and GER can be considered as a good source of x5-monoenes, especially for GER. The occurrence of the x5-monoenes in Alphitonia neocaledonica can at present be considered as an exception within the Rhamnaceae family. Except for Ziziphus jujuba var. inermis, no species of this family has been described with a broad profile of x5-monoene fatty acids.

Seed Oil Bodies from Gevuina avellana and Madia sativa

“…These authors found the n-5 monoene series with chain lengths of C 14 –C 28 and comprising 22.5% of the fatty acids derived from the seed oil of this plant. The concentrations of some n-5 isomers occurred in higher concentration in other Proteaceae. , The fatty acid pattern of OBs-M was similar to that reported in seeds by Schmeda-Hirschmann …”

“…The concentrations of some n-5 isomers occurred in higher concentration in other Proteaceae. 38,39 The fatty acid pattern of OBs-M was similar to that reported in seeds by Schmeda-Hirschmann. 22 Effect of pH and Ionic Strength on the Stability of Oil Body Suspensions.…”

Taxonomic notes on New Caledonian Malpighiales: Acridocarpus, Crossostylis, Erythroxylum, and Xylosma

“…The combination in Xylosma in pre-empted by three earlier names. The new epithet chosen commemorates Charly Zongo (1980Zongo ( -2015, for his contribution to our knowledge on the seed physiology of New Caledonian plants (Bombarda et al 2010;Zongo 2010;Zongo et al 2016).…”

New Caledonia: A ‘ Hot Spot’ for Valuable Chemodiversity

“…rubiginosa and Alphitonia neocaledonica (Rhamnaceae)h ave been investigated. They are characterized by ahigh percentage of unsaturated fattya cids and are even considered by the authors as a promising sourceo fw-5-monoenes that are uncommoni n the plant kingdom [48]. As shown in this article,t he investigation of the nutritive potential of seeds is also an original axis for the research of economical valorization of the New Caledonian flora.…”