Department of Crop Sciences , University of Illinois at Urbana-Champaign , 1201 W. Gregory Drive , Urbana , Illinois 61801 , United States.
Department of Food Science and Human Nutrition , University of Illinois at Urbana-Champaign , 905 S. Goodwin Avenue , Urbana , Illinois 61801 , United States.
J Agric Food Chem. 2018 Oct 17;66(41):10844-10854. doi: 10.1021/acs.jafc.8b04723. Epub 2018 Oct 9.
Anthocyanin pigments from purple corn are being explored as a potential alternative to artificial colorants and for their health-promoting properties. However, all pericarp-pigmented corn varieties examined to date primarily contain cyanidin-derived anthocyanins, which produce bluish-red or pink extracts. Here we describe the first pelargonidin-dominant pericarp-pigmented corn lines from the landrace Apache Red (AR). Anthocyanins were characterized from six AR families using high-performance liquid chromatography-mass spectrometry (HPLC-MS). From this, we identified two new flavanol-anthocyanin condensed forms in corn: catechin-(4,8)-pelargonidin 3,5-diglucoside and afzelechin-(4,8)-pelargonidin 3,5-diglucoside, which were subsequently confirmed with NMR. Additionally, several apigenin-derived C-glycosyl flavones were identified in abundance. With a diverse flavonoid profile containing an array of different anthocyanin species and flavones, Apache Red will be an important line in which to study control of the flavonoid biosynthesis pathway.
紫玉米中的花色苷色素被视为人工色素的潜在替代品，同时也因其具有促进健康的特性而受到关注。然而，迄今为止，所有经研究的果皮着色玉米品种主要都含有源自矢车菊素的花色苷，这些花色苷会产生蓝红色或粉红色的提取物。在这里，我们描述了源自地方品种 Apache Red (AR) 的第一个以天竺葵色素为主的果皮着色玉米品系。我们使用高效液相色谱-质谱联用仪 (HPLC-MS) 从六个 AR 家系中鉴定了花色苷。在此基础上，我们在玉米中鉴定了两种新的黄烷醇-花色苷缩合形式：儿茶素-(4,8)-天竺葵素 3,5-二葡萄糖苷和表儿茶素-(4,8)-天竺葵素 3,5-二葡萄糖苷，并用 NMR 进行了进一步验证。此外，还鉴定出了大量的芹菜素衍生的 C-糖苷黄酮。AR 含有一系列不同的花色苷和黄酮类化合物，具有多样化的类黄酮图谱，它将是研究类黄酮生物合成途径调控的一个重要品系。
