University of Ljubljana, Biotechnical Faculty, Agronomy Department, Chair for Fruit Growing, Viticulture and Vegetable Growing, Ljubljana, Slovenia.
J Sci Food Agric. 2013 Feb;93(3):681-92. doi: 10.1002/jsfa.5783. Epub 2012 Jul 17.
Plums are a rich source of nutritive and bioactive compounds. The objective was to evaluate the impact of fruit tissue (flesh and peel), ripening stage and cultivar on the composition of phytochemicals in plums (Prunus domestica L.) and to analyse the relation between total antioxidant activity (TAA) and the measured variables.
The content of total sugars and total organic acids was higher in flesh but total phenolic content (TPC) and TAA was statistically higher in plum peel. The composition of sugars depended on fruit tissue, ripening stage and the cultivar. Ripening and fruit tissue affected the composition and concentrations of organic acids. TPC of 'Haganta' peel increased during ripening but there was no significant time trend for 'Jojo' peel and flesh of both cultivars. The composition of phenolics in peel depended on the cultivar, but in flesh on the cultivar and ripening. Ripening resulted in increased total anthocyanins and TAA in peel. TAA(peel) was positively correlated with TPC(peel) , total anthocyanins(peel), cyanidin 3-glucoside(peel) and peonidin 3-rutinoside(peel) in the cultivar 'Haganta'.
The composition of phytochemicals in P. domestica fruit depends on fruit tissue, ripening stage and the cultivar. Peel contributes to the TAA on average 20 times more than flesh.
李属植物果实是营养和生物活性化合物的丰富来源。本研究旨在评估果实组织（果肉和果皮）、成熟度和品种对李属植物果实（Prunus domestica L.）中植物化学物质组成的影响，并分析总抗氧化活性（TAA）与所测变量之间的关系。
果肉中的总糖和总有机酸含量较高，但果皮中的总酚含量（TPC）和 TAA 统计学上较高。糖的组成取决于果实组织、成熟度和品种。成熟度和果实组织影响有机酸的组成和浓度。'Haganta'果皮的 TPC 在成熟过程中增加，但'Jojo'果皮和两个品种的果肉均无明显的时间趋势。果皮中酚类物质的组成取决于品种，但果肉取决于品种和成熟度。成熟导致果皮中总花青素和 TAA 增加。果皮中的 TAA（果皮）与果皮中的 TPC（果皮）、总花青素（果皮）、矢车菊素 3-葡萄糖苷（果皮）和芍药素 3-芸香糖苷（果皮）呈正相关。
李属植物果实中植物化学物质的组成取决于果实组织、成熟度和品种。果皮对 TAA 的贡献平均比果肉高 20 倍。
