College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
Food Chem. 2021 May 30;345:128727. doi: 10.1016/j.foodchem.2020.128727. Epub 2020 Nov 27.
This study investigated the individual and combined effects of ultraviolet A (UV-A) and far-red (FR) light irradiation on the biomass, phytochemical accumulation, and antioxidant capacity of two lettuce cultivars in an artificial light plant factory. UV-A supplementation yielded a smaller leaf area and reduced biomass and nitrate content. In contrast, it improved the chlorophyll, soluble protein, soluble sugar, vitamin C, flavonoid, polyphenol, and anthocyanin contents and the 2,2-diphenyl-1-picrylhydrazyl radical-scavenging rate. FR irradiation resulted in a larger leaf area, whereas the lettuce biomass remained unchanged. Irradiation with both UV-A and FR light exhibited the most remarkable effect on leaf expansion and biomass, but reduced the phytochemical contents. A significant interaction between the cultivar and supplemented light was observed for most plant parameters.
本研究调查了在人工光植物工厂中，紫外线 A（UV-A）和远红（FR）光单独及联合辐射对两种生菜品种生物量、植物化学物质积累和抗氧化能力的影响。UV-A 补充照射导致叶片面积减小，生物量和硝酸盐含量降低。然而，它提高了叶绿素、可溶性蛋白、可溶性糖、维生素 C、类黄酮、多酚和花青素的含量以及 2,2-二苯基-1-苦基肼自由基清除率。FR 辐射导致叶片面积增大，而生菜生物量保持不变。UV-A 和 FR 光的联合辐射对叶片扩张和生物量的影响最为显著，但降低了植物化学物质的含量。大多数植物参数的品种和补充光照之间存在显著的相互作用。
