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Revalorization of Tunisian wild Amaranthaceae halophytes: Nutritional composition variation at two different phenotypes stages

Mariem Maatallah Zaier,María Ciudad-Mulero,M. Cámara,Carla Pereira,I. Ferreira,L. Achour,Adnen Kacem,P. Morales

Published 2020 in Journal of Food Composition and Analysis

ABSTRACT

Abstract Wild halophytes are traditionally consumed in Tunisia as gourmet vegetables due to their salty taste and organoleptic proprieties. However, their nutritional composition is not deeply studied. The aim of this study was to characterize three Tunisian wild halophytic species (Arthrocnemum indicum (Willd.) Moq, Halocnemum strobilaceum (Pall.) M. Bieb., and Suaeda fruticosa Forssk) at two different phenotypic stages according to the seasonal variation. Amaranthaceae, is one of the well spread halophytes family shrubs in the world, mainly in Mediterranean countries. The studied wild halophytes are an interesting source of nutrients and could be considered as healthy foods with high levels of dietary fibers (7.63–10.14 g/100 g fw), protein (2.45–4.14 g/100 g fw), n-3 polyunsaturated fatty acids in green phenotypic stage (29.87 %–40.5 %) and n-6 polyunsaturated fatty acids in red-violet phenotypic stage (25.4 %–75.26 %), with particular relevance to linolenic acid content (20.7 %–75.22 %). These halophytes are also a good source of minerals, particularly sodium, calcium, potassium and magnesium, as well as vitamins C and E, with a major abundance of α-tocopherol.

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