End-Of-Day LED Lightings Influence the Leaf Color, Growth and Phytochemicals in Two Cultivars of Lettuce
End-Of-Day LED Lightings Influence the Leaf Color, Growth and Phytochemicals in Two Cultivars of Lettuce
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DOI：
10.3390/agronomy10101475
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发表时间：
2020-10-01
期刊：
影响因子：
3.7
通讯作者：
Liu, Houcheng
中科院分区：
文献类型：
--
作者：
Li, Yamin;Shi, Rui;Liu, Houcheng
四种光照处理（W：白色光; EOD-B：以2个生菜品种（Lactuca sativa cv.）为材料，采用日终增强蓝光（end-of-day enhanced blue light，EOD-FR：end-of-day supplementary far-red light，EOD-UV：end-of-day supplementary ultraviolet-A light）和日终紫外光（end-of-day supplementary ultraviolet-A light，EOD-FR：end-of-day supplementary far-red light，EOD-UV：end-of-day supplementary ultraviolet-A light）研究了日终光照（end-of-day lighting，黑暗期前30 min）对生菜叶片颜色、生物量和植物化学物质积累的影响。“红黄油”和“绿色黄油”）。EOD-FR促进了两个品种的植株和地上部生物量，EOD-B抑制了“红黄油”的生长，但诱导了“绿色黄油”较高的生物量。EOD光照使“红黄油”的叶片在收获时更亮、更绿、更黄，而“绿色黄油”的叶片在生长中期亮度最高、红色最深。‘红奶油’的叶绿素和类胡萝卜素含量显著高于其它品种，但这些色素对品种和EOD光照互作的敏感性较低。EOD光照抑制了两个品种花色苷的积累，但EOD-UV略微增加了“绿色黄油”花色苷的含量。EOD-UV处理增强了“绿色黄油”的抗氧化能力，但EOD光照对两个生菜品种抗氧化物质和营养物质含量的影响不同。
Four light treatments (W: white light; EOD-B: end-of-day enhanced blue light; EOD-FR: end-of-day supplementary far-red light; EOD-UV: end-of-day supplementary ultraviolet-A light) were designed to explore the effects of end-of-day (EOD) lightings (30 min before dark period) on leaf color, biomass and phytochemicals accumulation in two lettuce cultivars (Lactuca sativa cv. 'Red butter' and 'Green butter') in artificial light plant factory. EOD-FR stimulated the plant and shoot biomass of two cultivars, and EOD-B suppressed the growth of 'Red butter' but induced higher biomass in 'Green butter'. EOD lightings generated brighter, greener and yellower leaf in 'Red butter' at harvest, but the highest lightness and the deepest redness of 'Green butter' leaf were observed in the middle growth stage. 'Red butter' had prominent higher contents of chlorophylls and carotenoids, while these pigments showed less sensitivity to the interaction of cultivars and EOD lightings. EOD lightings impeded the accumulation of anthocyanin in two cultivars, except EOD-UV slightly increased the anthocyanin contents in 'Green butter'. EOD-UV strengthened the antioxidant capability of 'Green butter', but EOD lightings had different effects on the antioxidant and nutritional compound contents in two lettuce cultivars.