Flavonoids are characteristic in maize and have diverse biological functions. C-Glycosylflavones are neuroprotective against β-amyloid-induced tau hyperphosphorylation and neurotoxicity in SH-SY5Y cells, which is relevant to Alzheimer’s disease prevention and treatment. The content of the flavonoids eriodictyol, luteolin, isoorientin, and maysin varied in pollens, silks, tassels, and seeds among five maize varieties. Eriodictyol content was high (51–322 ng/g dw) in pollens, while luteolin content was low (0.2–106 ng/g dw) in all four tissues. The isoorientin content was approximately 3- to 10-fold greater than eriodictyol in pollens and tassels, particularly in the hybrid M1 and sweet corn M5 varieties. Maysin content was high in most silks and tassels. The differential expression of five genes involved in the maysin biosynthesis correlated well with the profiles of the four flavonoids among tissues and varieties. The present study offers valuable data for maize breeding and the use of maize flavonoids as functional food components.

中文翻译：

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五个品种玉米组织中四种生物活性黄酮的分布及其与生物合成基因表达的关系

类黄酮是玉米的特征，具有多种生物学功能。C-糖基黄酮对β-淀粉样蛋白诱导的tau过度磷酸化和SH-SY5Y细胞中的神经毒性具有神经保护作用，这与阿尔茨海默氏病的预防和治疗有关。在五个玉米品种中，花粉，蚕丝，and穗和​​种子中的黄酮醚黄酮，木犀草素，异Orientin和Maysin的含量各不相同。在所有四个组织中，花粉中的雌黄醇含量较高（51-322 ng / g dw），而木犀草素含量较低（0.2-106 ng / g dw）。在花粉和流穗中，特别是在杂种M1和甜玉米M5品种中，异Orientin含量大约比Eriodictyol高3至10倍。大多数丝绸和流苏中的Maysin含量很高。参与maysin生物合成的五个基因的差异表达与组织和变种中四个类黄酮的谱图相关性很好。