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Feasibility of developing a land-based source of functional omega-3 fatty acids on …


Biology Articles » Biotechnology » Modification of Plant Lipids for Human Health: Development of Functional Land-Based Omega-3 Fatty Acids » Figures

Figures
- Modification of Plant Lipids for Human Health: Development of Functional Land-Based Omega-3 Fatty Acids

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FIGURE 1 PUFA biosynthesis pathway. The arrows represent desaturation reactions. The enzymes catalyzing the reaction are listed above or beside each arrow. The portion of the pathway depicted in the solid box represents steps occurring principally in planta. The portion in dashed box represents enzymatic steps of the PUFA biosynthesis occurring principally in mammals after intake of dietary PUFA. The dark arrows represent the enzymatic reactions that were targeted for development of SDA-canola.

figure 1

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FIGURE 2 Fatty acid composition of the major vegetable oils. The approximate percentage of saturated fatty acids: SFA; monosaturated fatty acids, oleic acid; the PUFA, linoleic and {alpha}-linolenic acid; as weight percentage of total seed oil. Following each bar is the percentage of total fat intake for each vegetable oil in the U.S. * Ref. 5.

figure 2

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FIGURE 3 Effects of dietary {alpha}-linolenic acid (ALA), stearidonic acid (SDA) and eicosapentaenoic acid (EPA) on erythrocyte phospholipid EPA. Bars represent EPA at initiation of the study (-3 wk), after 3-wk dietary run-in period (0 wk), 3 wk of 0.75 g/d fatty acid intake (3 wk), and 3 wk of 1.5 g/d fatty acid intake (from Ref. 11). Asterisks indicates statistically significant differences, P

figure 3

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FIGURE 4 Fatty acid composition oil of conventional, nontransgenic and transgenic stearidonic acid (SDA)-canola oils. Sections of each bar represent the weight percentage of each fatty acid class in total lipids from a single seed. Top bar is conventional, nontransgenic canola, Middle bar is transgenic canola line transformed with a triple-gene vector containing the M. alpina Δ6 and Δ12 desaturases and B. napus Δ15 desaturase. Bottom bar is from an F1 hybrid between transgenic high γ-linolenic acid (GLA) canola line containing the M. alpina Δ6 and Δ12 desaturases, and transgenic high α-linolenic acid (ALA) canola line containing the B. napus Δ15 desaturase. Abbreviation: OA, oleic acid.

figure 4

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