Smart Farm Research Center, Gangneung Institute of Natural Products, Korea Institute of Science and Technology (KIST), Gangneung, Gangwon-do 25451, South Korea.
Food Chem. 2021 Mar 15;340:128167. doi: 10.1016/j.foodchem.2020.128167. Epub 2020 Sep 30.
Glucosinolates (GLs), found in Brassicaceae family, are precursor metabolites with anti-cancer properties. Increased GLs have been studied under various environmental growth conditions. Pak choi (Brassica rapa subsp. chinensis) is a GL-rich vegetable. We hypothesize that long exposure to light and drought will increase the biomass of, and GL production in, pak choi. The experiment was conducted for 6 weeks. Long light exposure (20 h/day) increased, whilst drought exposure (12 h/week) decreased the plant growth. The plants exposed to a combination of drought and long light conditions showed similar growth pattern as control plants. GL production increased at week 6 in plants exposed to long light, while drought exposure had no impact on GL production, with the exception of glucoraphanin. Significant positive correlations were observed between plant growth and GL yield with accumulated light exposure time. Our findings suggest that long exposure to light can be used to increase both the biomass and GL production in pak choi.
硫代葡萄糖苷（GLs）存在于十字花科植物中，是具有抗癌特性的前体代谢物。在各种环境生长条件下，GLs 的含量都有所增加。白菜（白菜亚种白菜）是一种 GL 含量丰富的蔬菜。我们假设长时间暴露在光和干旱下会增加白菜的生物量和 GL 产量。该实验进行了 6 周。长时间光照（每天 20 小时）增加了，而干旱暴露（每周 12 小时）减少了植物的生长。暴露在干旱和长时间光照条件下的植物表现出与对照植物相似的生长模式。在暴露于长光照的植物中，GL 产量在第 6 周增加，而干旱暴露对 GL 产量没有影响，除了萝卜硫素。在累积光照时间与植物生长和 GL 产量之间观察到显著的正相关关系。我们的研究结果表明，长时间暴露在光线下可以增加白菜的生物量和 GL 产量。
