Chiu Chun-Hui, Lin Kuan-Hung, Lin Hsin-Hung, Chu Wen-Xin, Lai Yung-Chang, Chao Pi-Yu
Graduate Institute of Health Industry and Technology, Research Center for Chinese Herbal Medicine, Research Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan.
Department of Traditional Chinese Medicine, Keelung Chang Gung Memorial Hospital, Keelung 20401, Taiwan.
Plants (Basel). 2022 Aug 7;11(15):2063. doi: 10.3390/plants11152063.
Sweet potato ( L.) is one of the most important food crops worldwide, with leaves of different varieties showing purple, green and yellow, and these leaves provide a dietary source of nutrients and various bioactive compounds. The objective of this study was to identify the active constituents of chlorogenic acids (CGAs) in different methanolic extract of leaves of three varieties of sweet potato (purple CYY 98-59, green Taoyuan 2, and yellow CN 1927-16) using liquid chromatography-tandem mass spectrometry. Genotype-specific metabolite variations were observed; CGAs and three isomeric peaks were detected in sweet potato leaf extracts (SPLEs). Among them, the yellow SPLE contained the highest contents of 3,5-dicaffeoylquinic acid (3,5-di-CQA) and 3,4-dicaffeoylquinic acid (3,4-di-CQA), followed by the green SPLE, whereas the purple SPLE retained lower 3,5-di-CQA content compared to yellow and green SPLEs. All three SPLEs contained lower 4,5-dicaffeoylquinic acid (4,5-di-CQA) and CGA contents compared to 3,5-di-CQA and 3,4-di-CQA, although CGA constituents were not significantly different in genotypes, whereas purple SPLE contained higher 4,5-di-CQA content compared to yellow and green SPLEs. This study indicates that SPLs marketed in Taiwan vary widely in their biological potentials and may impart different health benefits to consumers.
甘薯（Ipomoea batatas (L.)）是全球最重要的粮食作物之一，不同品种的甘薯叶呈现紫色、绿色和黄色，这些叶片提供了营养物质和各种生物活性化合物的膳食来源。本研究的目的是使用液相色谱 - 串联质谱法鉴定三种甘薯品种（紫色的CYY 98 - 59、绿色的桃源2号和黄色的CN 1927 - 16）叶片不同甲醇提取物中绿原酸（CGAs）的活性成分。观察到了基因型特异性的代谢物差异；在甘薯叶提取物（SPLEs）中检测到了CGAs和三个异构体峰。其中，黄色SPLE中3,5 - 二咖啡酰奎尼酸（3,5 - 二CQA）和3,4 - 二咖啡酰奎尼酸（3,4 - 二CQA）的含量最高，其次是绿色SPLE，而紫色SPLE中3,5 - 二CQA的含量低于黄色和绿色SPLE。与3,5 - 二CQA和3,4 - 二CQA相比，所有三种SPLE中4,5 - 二咖啡酰奎尼酸（4,5 - 二CQA）和CGA的含量较低，尽管CGA成分在基因型上没有显著差异，但紫色SPLE中4,5 - 二CQA的含量高于黄色和绿色SPLE。本研究表明，台湾市场上销售的甘薯叶在其生物潜力方面差异很大，可能会给消费者带来不同的健康益处。
