UFRR/CAA, Department of Fitotecnia, Food and Technology Laboratory, University of Roraima State, BR 174 Km 12, 69310-270 Boa Vista, RR, Brazil.
UFRR/CAA, Department of Fitotecnia, Food and Technology Laboratory, University of Roraima State, BR 174 Km 12, 69310-270 Boa Vista, RR, Brazil.
Food Chem. 2015 May 1;174:188-96. doi: 10.1016/j.foodchem.2014.10.111. Epub 2014 Oct 29.
The post-harvest nutraceutical characteristics of highly perishable native fruits species from the Northern Brazilian Amazon region were studied during 12 day at 15 ± 1 °C and 95 ± 3% RH. Uxi and caja fruit showed climacteric behaviour while caju, açai de terra firme, camu-camu, inajá, murici and araçá-boi were non-climacteric. Soluble solids and sugars increased for climacteric fruit while total acidity remained constant for all fruits. In general, all fruit species had high levels of total phenolics (121-9889 mg GAE 100 g(-1) dry weight pulp), vitamin C (31-1532 mg AA 100 mL(-1) juice) and antioxidant activity (AOX) (75-288 1 μmol Trolox Eq 100 g(-1) dry weight, ORAC value), however, camu-camu, acai and murici were among the highest. All fruits showed an increase in phenolic content (15-82%), a simultaneous decrease in ascorbic acid in both peel (88-98%) and pulp (89-97%), while AOX increased or decreased depending on the fruit species, very likely due to the specific phenolic profile being synthesized. We propose a hypothetical model where ripening/senescence induced a redox homeostasis imbalance which in turn triggered the responses.
在 15 ± 1°C 和 95 ± 3% RH 的条件下，对来自巴西亚马逊北部地区的高度易腐本地水果的收获后营养特性进行了为期 12 天的研究。乌希果和卡雅果表现出呼吸跃变行为，而卡茹果、亚马逊土产巴西莓、卡姆果、伊纳贾果、穆里西果和树番茄则没有呼吸跃变。对于呼吸跃变水果，可溶性固形物和糖含量增加，而所有水果的总酸度保持不变。总的来说，所有水果品种都具有高含量的总酚类物质（121-9889mgGAE/100g 干重果肉）、维生素 C（31-1532mgAA/100mL 果汁）和抗氧化活性（AOX）（75-2881μmolTroloxEq/100g 干重，ORAC 值），然而，卡姆果、巴西莓和穆里西果的含量最高。所有水果的酚类物质含量均增加（15-82%），果皮（88-98%）和果肉（89-97%）中的抗坏血酸含量同时下降，而 AOX 的增加或减少则取决于水果品种，这很可能是由于特定的酚类物质谱被合成。我们提出了一个假设模型，其中成熟/衰老诱导了氧化还原平衡失衡，进而引发了这些反应。
