Changes in Fatty Acid, Tocopherol and Xanthophyll Contents During the Development of Tunisian-Grown Pecan Nuts |
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Authors: | Intidhar Bouali Hajer Trabelsi Ikram Bou Abdallah Ali Albouchi Lucy Martine Stéphane Grégoire Ghaith Bouzaien Mhemmed Gandour Sadok Boukhchina Olivier Berdeaux |
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Affiliation: | 1. Faculté des Sciences de Tunis, Unité de Biochimie des Lipides, département de Biologie, Université de Tunis El Manar, , Tunis, 2092 Tunisia;2. Laboratoire d’Ecologie Forestière, Institut Nationale des recherches en Génie Rural, Eaux et Forêts, , Ariana, Tunis, 2080 Tunisia;3. Centre des Sciences du Go?t et de l’Alimentation, UMR6265 CNRS, UMR1324 INRA, Université de Bourgogne, , Dijon, 21000 France;4. Laboratoire d’Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie de Borj‐Cédria, , Hammam‐Lif, Tunis, 2050 Tunisia |
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Abstract: | Among oil compounds, fatty acids, tocopherols and xanthophylls (lutein and zeaxanthin) are of special interest due to their nutritional properties. The identification and quantification of these compounds in pecan nuts (Carya illinoinensis) could therefore be very useful to produce functional foods rich in compounds of this type. This paper reports studies on their accumulation and the effect of ripening on the content of these high value-added compounds. The total lipid content increased during the ripening. Saturated and polyunsaturated fatty acids decreased significantly, whereas, monounsaturated fatty acids increased during the ripening of pecan nut fruit. Maximum levels of total tocopherol (279.53 mg/kg oil) and xanthophyll (6.18 mg/kg oil) were detected at 20th weeks after the flowering date. These amounts decreased gradually as ripening advances. The early stages of pecan ripening seem to have nutritional and pharmaceutical interests. These results may be useful for evaluating the pecan nut quality and determining the optimal period when the pecans accumulated the maximum of these nutritional and healthy compounds. |
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Keywords: | Total lipids Fatty acids Tocopherols Xanthophylls Pecan nut fruit Accumulation |
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