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Postharvest UV-B irradiation maintains sensory qualities and enhances antioxidant capacity in tomato fruit during storage

机译:收获后的UV-B辐射可保持番茄的感官品质,并在储存过程中增强其抗氧化能力

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Mature-green tomato fruit (Lycopersicon esculentum cv. Zhenfen 202) were exposed to different doses of UV-B irradiation (10, 20, 40 and 80 kJ/m super(2)) and stored in the dark at 14 degree C, 95% RH for up to 37 d. Of the four doses, 20 or 40 kJ/m super(2) was most effective in maintaining a high level of firmness and delaying the colour development. Furthermore, 20 or 40 kJ/m super(2) promoted the accumulation of total phenolics and total flavonoids, and enhanced antioxidant capacity during storage, though UV-B irradiation could reduce the ascorbic acid content. A dose of 10 kJ/m super(2) had similar effects but to a lesser extent. The highest dose of 80 kJ/m super(2) resulted in higher lycopene content, but showed negative effects on texture, colour, and other antioxidants. The optimum dose of UV-B for maintaining sensory qualities and enhancing antioxidant capacity was 20 or 40 kJ/m super(2). These results suggest that UV-B irradiation appears to be a useful non-chemical way of maintaining postharvest quality and enhancing antioxidant capacity in tomato fruit.
机译:将成熟绿色的番茄果实(Lycopersicon esculentum cv。Zhenfen 202)暴露于不同剂量的UV-B辐照下(10、20、40和80 kJ / m super(2)),并在14摄氏度,95摄氏度的黑暗条件下储存相对湿度达37 d。在这四种剂量中,super(2)20或40 kJ / m在保持高硬度和延迟显色方面最有效。此外,尽管UV-B辐射可以降低抗坏血酸的含量,但20或40 kJ / m的super(2)促进了总酚类和总黄酮的积累,并增强了存储过程中的抗氧化能力。 10 kJ / m super(2)的剂量具有相似的作用,但程度较小。最高剂量为80 kJ / m super(2)导致较高的番茄红素含量,但对质地,颜色和其他抗氧化剂产生不利影响。维持感觉品质和增强抗氧化能力的最佳UV-B剂量为20或40 kJ / m super(2)。这些结果表明,UV-B辐射似乎是保持番茄果实采后质量和增强抗氧化能力的一种有用的非化学方法。

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