Ifeanacho Mercy O, Ikewuchi Catherine C, Ikewuchi Jude C
Department of Biochemistry Faculty of ScienceUniversity of Port Harcourt Port Harcourt Nigeria.
Food Sci Nutr. 2016 Nov 23;5(3):646-652. doi: 10.1002/fsn3.443. eCollection 2017 May.
The profile of phenolic compounds in the leaves and stems of was investigated using gas chromatography coupled with flame ionization detector. The leaves and stems had high flavonoids and benzoic acid derivatives content, and moderate levels of lignans and hydroxycinnamates. Twenty-eight known flavonoids were detected, which consisted mainly of kaempferol (41.93% in leaves and 47.97% in stems), (+)-catechin (17.12% in leaves and 16.11% in stems), quercetin (13.83% in leaves and 9.39% in stems), luteolin (7.34% in leaves and 7.71% in stems), and artemetin (6.53% in leaves and 4.83% in stems). Of the six known hydroxycinnamates detected, chlorogenic acid (80.79% in leaves and 87.56% in stems) and caffeic acid (18.98% in leaves and 12.30% in stems) were the most abundant, while arctigenin (77.81% in leaves and 83.40% in stems) and retusin (13.82% in leaves and 10.59% in stems) were the most abundant of the nine known lignans detected. Twelve known benzoic acid derivatives were detected, consisting mainly of ellagic acid (65.44% in leaves and 72.89% in stems), p-hydroxybenzoic acid (25.10% in leaves and 18.95% in stems), and vanillic acid (8.80% in leaves and 7.30% in stems). The rich phytochemical profile of the leaves and stems is an indication of their ability to serve as sources of nutraceuticals.
采用气相色谱-火焰离子化检测器联用技术对某植物叶片和茎中的酚类化合物进行了分析。叶片和茎中黄酮类化合物和苯甲酸衍生物含量较高，木脂素和羟基肉桂酸含量适中。共检测到28种已知黄酮类化合物，主要包括山奈酚（叶片中占41.93%，茎中占47.97%）、（+）-儿茶素（叶片中占17.12%，茎中占16.11%）、槲皮素（叶片中占13.83%，茎中占9.39%）、木犀草素（叶片中占7.34%，茎中占7.71%）和青蒿亭（叶片中占6.53%，茎中占4.83%）。在所检测到的6种已知羟基肉桂酸中，绿原酸（叶片中占80.79%，茎中占87.56%）和咖啡酸（叶片中占18.98%，茎中占12.30%）含量最高，而在所检测到的9种已知木脂素中，牛蒡子苷元（叶片中占77.81%，茎中占83.40%）和扁蒴藤素（叶片中占13.82%，茎中占10.59%）含量最高。共检测到12种已知苯甲酸衍生物，主要包括鞣花酸（叶片中占65.44%，茎中占72.89%）、对羟基苯甲酸（叶片中占25.10%，茎中占18.95%）和香草酸（叶片中占8.80%，茎中占7.30%）。叶片和茎丰富的植物化学特征表明它们有潜力作为营养保健品的来源。
