Food Chem. 2021 Aug 30;354:129491. doi: 10.1016/j.foodchem.2021.129491. Epub 2021 Mar 8.
The study was aimed to evaluate if deetiolation of barley and wheat microgreens after cultivaton in dark (for 5, 7 and 9 days) can enhance the contents of pigments, ascorbic acid, polyphenols, and equivalent antioxidant capacities (EAC) (measured by DPPH and FRAP assay) in correlation to other. Chlorophylls and carotenoids were higher in microgreens that were exposed more to daylight. In contrast, ascorbic acid, polyphenols and EAC of microgreens could be enhanced by 5-7 days of etiolation. However, prolonged etiolation reduced overall antioxidant capacities of microgreens. All evaluated parameters could be satisfactorily represented by regression expressions for the given number of days of etiolation and growth. The ascorbic acid and total carotenoids content had higher correlations with total chlorophyll contents, while the antioxidant capacities were highly correlated to total polyphenols content. The study confirms the potential of deetiolated cultivation of microgreens to enhance selective phytochemicals content and EAC of microgreens.
本研究旨在评估在黑暗中培养（5、7 和 9 天）后大麦和小麦微绿芽去黄化是否可以提高色素、抗坏血酸、多酚和当量抗氧化能力（DPPH 和 FRAP 测定）的含量，与其他物质相关。在微绿芽中，暴露在更多日光下的叶绿素和类胡萝卜素含量更高。相比之下，5-7 天的黄化可以增强微绿芽中的抗坏血酸、多酚和 EAC。然而，长时间的黄化会降低微绿芽的整体抗氧化能力。所有评估的参数都可以通过给定的黄化和生长天数的回归表达式来令人满意地表示。抗坏血酸和总类胡萝卜素含量与总叶绿素含量有更高的相关性，而抗氧化能力与总多酚含量高度相关。该研究证实了去黄化栽培微绿芽可以提高微绿芽中选择性植物化学物质含量和 EAC 的潜力。
