Carotenoids, sugars, ascorbic acid, total phenolics, and antioxidant activity of murici from Brazilian Cerrado during refrigerated storage

ABSTRACT: Native fruits are economically important to small producers, and they are a important part of the diet of several communities. Therefore, postharvest studies of these fruits are essential. In addition, research involving their chemical composition can identify substances that add potential value to the fruits, especially from a nutritional and medicinal standpoint. This study characterized the fruits of the muricizeiro shrub (Byrsonima crassifolia, Malpighiaceae), which were harvested from native plants on private properties and stored for 16 days at a mean temperature of 12 °C. The fruits were evaluated during storage for: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ascorbic acid content, phenolics and carotenoids total, carotenoids profile, glucose, fructose and sucrose contents. Overall, the temperature that the fruits were storage at was effective at maintaining the quality of the fruit. However, the ascorbic acid content of the fruits did decrease during the storage period. Results showed that the fruits had a high antioxidant capacity, possibly because of the presence of phenolic compounds and carotenoids. It is also important to highlight that this fruit is source of vitamin A, owing to the high concentration of β-carotene.

摘要：本土果树对小型种植户具有重要经济价值，同时亦是诸多社区膳食结构的重要组成部分。因此，针对这类果品开展采后研究至关重要。此外，对其化学成分展开探究，可挖掘能够为果实赋予潜在应用价值的活性物质，尤其在营养与药用价值层面具有重要意义。本研究对muricizeiro灌木（Byrsonima crassifolia，金虎尾科Malpighiaceae）的果实进行了品质表征：该果实采自私人地块的原生植株，随后在平均温度12℃的环境中储存16天。储存期间，我们对果实的多项指标进行了检测，包括2,2-二苯基-1-苦肼基（2,2-diphenyl-1-picrylhydrazyl, DPPH）自由基清除活性、抗坏血酸含量、总酚类与总类胡萝卜素含量、类胡萝卜素组成，以及葡萄糖、果糖与蔗糖含量。总体而言，该储存温度可有效维持果实的整体品质，但在储存周期内，果实的抗坏血酸含量确实出现了下降。研究结果表明，该果实具备较强的抗氧化能力，这可能与其含有的酚类化合物与类胡萝卜素密切相关。此外值得重点强调的是，由于β-胡萝卜素含量较高，该果实可作为维生素A的优质天然来源。