文章基本信息

标题：Nutritional and biochemical properties of natural sweeteners of six cultivars of Stevia rebaudiana Bertoni leaves grown in Morocco
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作者：Khiraoui A. ; Bakha M. ; Amchra F. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：3
页码：1015-1022
出版社：University of Mohammed Premier Oujda
摘要：In order to know the variability of a breeding on six cultivars from different areas in Morocco, Stevia rebaudiana leaf was investigated for its proximate composition, mineral content and biochemical screening. Further, stevia plants are a good source of carbohydrates, protein and crude fiber contents were found to be (51.50 – 56.72%), (11.75 – 16.23%) and (17.43 – 19.13%) on dry weight basis, respectively. In this order, stevia leaves also contained (12.47 to 17.35 %) on dry weight basis for total soluble carbohydrates. Minerals content analysed by spectrometric ICP-AES showed that the high content of K, Ca, Mg, Na of stevia were present in the leaf; whereas, Mn, Fe, Cu, Zn, and Cr were found as trace amount. The responsible compounds for the natural sweetness of stevia leaves include a diversity of diterpenoid glycosides derived from a steviol skeleton. These steviol glycosides also exhibit a low calorific value as well as promising therapeutic applications. The stevioside was extracted by hot water (60 °C) from the dried stevia leaves and analyzed by HPLC. Our results showed that the stevioside content was obtained at (6.26 - 10.10 %) on dry weight basis. So, stevia leaf produces a variety of high potential natural-source and low calorie sweetener. These results strongly suggest that due to its all favourable properties; stevia could be used in either food or cosmetic and pharmaceutical products.
关键词：Stevia rebaudiana; proximal composition; carbohydrates; protein; crude fiber; fat; minerals; stevioside.