文献类型： 外文期刊

作者： Yu, Yan-Ge ¹ ; Guo, Xiao-Yang ¹ ; Li, Xiang-Yang ¹ ; Dai, Dan-Dan ¹ ; Xu, Xin-Ran ¹ ; Ge, Xiao-Jin ¹ ; Li, Yan-Jun ¹ ; Ya ¹ ;

作者机构： 1.Henan Acad Agr Sci, Ind Crops Res Inst, Zhengzhou 450002, Peoples R China

2.Henan Prov Ctr Engn & Technol Res Tradit Chinese, Zhengzhou 450002, Peoples R China

关键词： Dioscorea polystachya; UPLC-QTOF; MS; tuber cortex; tuber flesh; various ages

期刊名称：CHEMISTRY & BIODIVERSITY （ 影响因子：2.408； 五年影响因子：2.351 ）

ISSN： 1612-1872

年卷期： 2021 年 18 卷 2 期

页码：

收录情况： SCI

摘要： Dioscorea polystachya, named Chinese yam, is widely cultivated as a functional food and natural medicine in China. There is currently little information about the chemical characteristics of Dioscorea polystachya in different organs (tuber cortex and tuber flesh) and at various ages. In this study, an ultra-high-performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (UPLC-QTOF/MS) was used to profile chemical compounds in Dioscorea polystachya. As a result, thirty-eight compounds were detected in yam tuber cortex and tuber flesh. More compounds were detected in yam tuber cortex than in tuber flesh. Compounds such as dehydroepiandrosterone, allantoin and flavonoids were selected as biomarker candidates. Dehydroepiandrosterone was found more abundant in tuber flesh, while allantoin and flavonoids showed higher levels in tuber cortex. Furthermore, the levels of dioscin, malvalic acid and sucrose differed significantly among age groups and were highest in the tubers at 2 years. While the levels of allantoin, adenosine and glutamine increased with the growing years and were highest at 4 years. Thus, 2-year old Dioscorea polystachya tubers could be harvested to prepare dioscin, malvalic acid and sucrose supplements. The 4-year-old Dioscorea polystachya tubers would be the best choice for obtaining a large amount of allantoin and adenosine in industrial production.