Functional properties of select edible oilseed proteins by ProQuest


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									                      inform July 2010, Vol. 21 (7) 455

        showed that stereospecific analyses of tria-       chromatography. Overall, α-tocopherol was          to several retinopathies. Sphingosine-1-
        cylglycerols together with other chemical          the most responsive to the factors evaluated;      phosphate can prevent this death but also
        determinations can be useful in building a         the response of other tocopherols was often        promotes cell proliferation that might lead to
        protocol for the evaluation of the genuine-        lower or inconsistent across environments.         neovascularization and fibrosis. Recent data
        ness of pumpkin seed oil from Slovenia.            The seeding rate affected α-tocopherol con-        support Cer and Sph as crucial mediators
                                                           centrations in three out of five environments;     in the induction of photoreceptor apoptosis
        Functional properties of select                    seeding at a rate of 40 seeds m−2 resulted in      in diverse models of oxidative damage and
                                                           4% higher concentrations than seeding at a         neurodegeneration and suggest that regulat-
        edible oilseed proteins                            higher rate. Wide row spacing (more than           ing their metabolism can prevent this death.
        Sharma, G.M., et al., J. Agric. Food Chem.         36 cm) resulted, in two out of five environ-       New evidence proposes a central role for
        58:5457–5464, 2010.                                ments, in 6% higher α-tocopherol concentra-        S1P controlling photoreceptor survival and
             Borate saline buffer (0.1 M, pH 8.45)         tions as compared to narrower row spacing.         differentiation. Finally, this review discusses
        solubilized proteins from almond, Brazil           The seeding date had a greater impact; mid-        the ability of trophic factors to regulate
        nut, cashew nut, hazelnut, macadamia, pine         to late-May seeding across four environ-           sphingolipid metabolism and transactivate
        nut, pistachio, Spanish peanut, Virginia           ments resulted in 45% greater α-tocopherol         S1P signaling pathways to control survival
        peanut, and soybean seeds were prepared            concentrations than seeding at later dates.        and development in retina photoreceptors.
        from the corresponding defatted flour. The         Phosphorus and K fertilization had a negli-
        yield ranged from 10.6% (macadamia) to             gible impact on tocopherol concentrations.         Glycerophospholipid and
        27.4% (almond). The protein content, on a          Across experiments, large differences were
        dry weight basis, of the lyophilized prepa-        observed between environments; plants              triacylglycerol distribution in
        rations ranged from 69.23% (pine nut) to           grown in northern environments consis-             corn kernels (Zea mays L.)
        94.80% (soybean). Isolated proteins from           tently had lower concentrations of α- and          Harrabi, S., et al., J. Cereal Sci., 51:1–6,
        Brazil nut had the lightest and hazelnut the       γ-tocopherols but higher concentrations of         2010
        darkest color. Isolated proteins exhibited         δ-tocopherol. Differences between culti-                The distribution of various molecular
        good solubility in aqueous media. Foaming          vars were also consistent, ranging between         species of triacylglycerols (TAG) and phos-
        capacity (<40% overrun) and stability (<1          10 and 30%, depending on the tocopherol.           pholipids among three corn kernel parts was
        h) of the isolated proteins were poor to fair.     Results demonstrate that soybean tocopherol        determined by liquid chromatography/elec-
        Almond proteins had the highest viscos-            concentrations are affected by crop manage-        trospray ionization-mass spectroscopy. A
        ity among the tested proteins. Oil-holding         ment and thus suggest that specific recom-         comparison between three corn kernel parts
        capacity of the isolated proteins ranged from      mended agronomic practices may need to be          demonstrated that there was a s
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