Program in Health and Development in the Midwestern Region, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil.
Group of Spectroscopy and Bioinformatics Applied to Biodiversity and Health, Faculty of Medicine, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil.
Food Res Int. 2020 Nov;137:109576. doi: 10.1016/j.foodres.2020.109576. Epub 2020 Aug 1.
Pouteria glomerata is a native species from the Brazilian Pantanal, whose fruit is edible and still underexploited. The objective of this study was to carried out the chemical, nutritional and antioxidant properties of this tropical fruit, as well as to isolate e characterize the chemical strucutre of their dietary fibers. DPPH and ORAC methods were used to determine the antioxidant capacity. Minerals were quantified using inductively coupled plasma optical emission spectrometry. Soluble and insoluble dietary fiber fractions were obtained by the standard enzymatic-gravimetric method and chemically characterized by monosaccharide composition, gel permeation and NMR spectroscopy. Results showed that P. glomerata fruits presented high antioxidant capacity and high levels of vitamin C, minerals, insoluble dietary fiber, and malic acid. The soluble dietary fiber was mainly composed of uronic acids, arabinose, and galactose, and NMR analysis indicated the presence of highly methylesterified homogalacturonan, arabinan and/or arabinogalactan as pectic polysaccharides. Hemicelluloses present in insoluble dietary fiber fraction were solubilized by alkaline treatment, and characterized as (1 → 4)-β-D-xylan. The results brings new chemical information about this native fruit and may open new opportunities for using it as a potential ingredient for health improvement by human comsumption.
聚果榕是一种原产于巴西潘塔纳尔的本地物种，其果实可食用，但仍未得到充分开发。本研究的目的是对这种热带水果进行化学、营养和抗氧化特性分析，以及分离和表征其膳食纤维的化学结构。使用 DPPH 和 ORAC 方法来测定抗氧化能力。使用电感耦合等离子体光学发射光谱法来定量矿物质。通过标准的酶-重量法获得可溶和不可溶膳食纤维分数，并通过单糖组成、凝胶渗透和 NMR 光谱进行化学表征。结果表明，聚果榕果实具有高抗氧化能力和高维生素 C、矿物质、不可溶性膳食纤维和苹果酸含量。可溶性膳食纤维主要由戊糖醛酸、阿拉伯糖和半乳糖组成，NMR 分析表明存在高度甲酯化的同质半乳糖醛酸、阿拉伯聚糖和/或阿拉伯半乳聚糖作为果胶多糖。用碱性处理可使不溶性膳食纤维部分中的半纤维素溶解，并鉴定为（1→4）-β-D-木聚糖。这些结果为这种本地水果提供了新的化学信息，可能为将其作为改善人类健康的潜在成分提供新的机会。
