Nutritional composition and bioactive compounds of a local variety of Vitis vinifera L. cultivated in Morocco.

Q2 Medicine

Roczniki Panstwowego Zakladu Higieny Pub Date : 2023-01-01 DOI:10.32394/rpzh.2023.0244

Adil Kalili, Rachida El Ouafi, Abdelghani Aboukhalaf, Kaoutar Naciri, Manal Tbatou, Sara Moujabbir, Abdelmonaim Belahyan, Rekia Belahsen

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Abstract

Background: The vine is considered one of the most important and popular fruits in the world thanks to its high nutritional value and high fiber content.

Objective: This study aim was to evaluate the nutritional composition in a local variety 'Doukkali' grape (Vitis vinifera L.) in the perspective of their suitability for pharmaceutical and agri-food use.

Material and methods: The proximate composition and minerals were determined using AOAC methods, the total sugar by HPLC method. The total phenolic compounds using the Folin-Ciocalteu reagent, the total flavonoids using aluminum chloride colorimetric method and tannins by the method of vanillin.

Results: The analysis of the raisin of this variety revealed a high carbohydrate content of 61% with high levels of glucose (31.6%), fructose (30.4%), dietary fiber (13.92%) and minerals including potassium (445.50 mg/100 g DM), calcium (193.26 mg/100 g DM), sulfur (171.63 mg/100 g DM), sodium (137.50 mg/100 g DM), phosphorus (99.79 mg/100 g DM), magnesium (54.74 mg/100 g DM) and iron (2.39mg/ g DM). Analysis of bioactive compounds showed significant content of polyphenols varying from 43 to 309.1 mg GAE/g DM, flavonoids from 1.0 to 23.8 mg CEQ/g DM and tannins from 2.5 to 50.45 mg TAE/g DM.

Conclusions: The study shows that the local variety of Doukkali grape has an important nutritional potential that can contribute to the nutritional needs and the fight against malnutrition as well as to the dietary diversity of the local population.

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摩洛哥栽培的葡萄品种的营养成分和生物活性化合物。

背景:由于其高营养价值和高纤维含量，葡萄藤被认为是世界上最重要和最受欢迎的水果之一。目的:从药用和农业食品的适宜性角度对当地品种“Doukkali”葡萄的营养成分进行评价。材料与方法:用AOAC法测定其近似成分和矿物质，用HPLC法测定总糖。总酚类化合物采用Folin-Ciocalteu试剂，总黄酮采用氯化铝比色法，单宁采用香兰素法。结果:该品种葡萄干碳水化合物含量为61%，葡萄糖(31.6%)、果糖(30.4%)、膳食纤维(13.92%)含量高，钾(445.50 mg/100 g DM)、钙(193.26 mg/100 g DM)、硫(171.63 mg/100 g DM)、钠(137.50 mg/100 g DM)、磷(99.79 mg/100 g DM)、镁(54.74 mg/100 g DM)、铁(2.39mg/ 100 g DM)等矿物质含量高。生物活性成分分析显示，多酚含量在43 ~ 309.1 mg GAE/g DM之间，黄酮类化合物含量在1.0 ~ 23.8 mg CEQ/g DM之间，单宁含量在2.5 ~ 50.45 mg TAE/g DM之间。结论:该研究表明，当地品种Doukkali葡萄具有重要的营养潜力，可以满足当地人群的营养需求，对抗营养不良，并促进当地人群的饮食多样性。

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