ABSTRACT

Sweet potatoes are experiencing increased popularity across many parts of the world due to their high levels of functionally beneficial compounds, including vitamin C, anthocyanins and carotenoids. However, limited work has been performed on Australian-grown sweet potatoes. This work investigated the key phytochemical composition of the root tissue of five Australian sweet potato cultivars that are grown commercially. The cultivar WSPF (White Skin, Purple Flesh) displayed the highest total phenolic content, total antioxidant capacity and total anthocyanin content. However, the cultivar Bellevue contained the highest β-carotene content (48.2 mg 100 g⁻¹ on a dry weight basis), followed by New Orleans and Beauregard (43.0 and 34.0 mg 100 g⁻¹, respectively). White and purple-fleshed cultivars contained virtually no β-carotene (0.1–0.2 mg 100 g⁻¹). The New Orleans cultivar had the highest ascorbic acid content on a dry weight basis (51.9 mg 100 g⁻¹) and the WSPF cultivar the lowest (17.8 mg 100 g⁻¹).

摘要

红薯在世界许多地方越来越受欢迎，因为它们含有大量有益功能的化合物，包括维生素 C、花青素和类胡萝卜素。然而，对澳大利亚种植的红薯开展的工作有限。这项工作调查了五个商业种植的澳大利亚甘薯品种的根组织的关键植物化学成分。栽培品种 WSPF（白皮，紫肉）表现出最高的总酚含量、总抗氧化能力和总花青素含量。然而，品种 Bellevue 的 β-胡萝卜素含量最高（48.2 mg 100 g ^-1以干重计），其次是 New Orleans 和 Beauregard（43.0 和 34.0 mg 100 g ^-1， 分别）。白色和紫色果肉品种几乎不含β-胡萝卜素（0.1-0.2 mg 100 g ^-1）。以干重计，New Orleans 品种的抗坏血酸含量最高（51.9 mg 100 g ^-1），WSPF 品种最低（17.8 mg 100 g ^-1）。