【摘要】 薯蓣属植物(Dioscorea L.)多数种类可供药用和食用,具有重要的经济价值,其矿质元素含量变化对薯蓣资源的评价和安全食用具有重要意义。本研究以产自云南的参薯(D.alata L.)、薯蓣(D.opposita Thunb.)、日本薯蓣(D.japonica Thunb.)、毛胶薯蓣(D.subcalva Prain et Burkill)、云南薯蓣(D.yunnanensis Prain et Burkill)和高山薯蓣(D.henryi(Prain et Burkill)C.T.Ting)为研究对象,采用火焰原子吸收分光光度法(FAAS)和原子荧光分光光度法(AFS)分别测定这6种薯蓣属植物地下块茎中11种矿质元素的含量并构建元素指纹图谱。结果表明:Pearson相关系数和夹角余弦均可用于薯蓣元素指纹图谱的相似性分析;Fe和Mg是6种薯蓣中的主要矿质元素;Cu、Zn、Mn、Na和K的绝对含量介于1~100 mg/kg之间,为薯蓣中的累积微量元素;As和Cd的绝对含量低于1 mg/kg,为薯蓣中的痕量元素;Cu、Zn、Pb、Ni、Mg、Fe、Mn、Na和K的百分含量对不同薯蓣样品间元素指纹图谱的差异性影响最大。研究结果为薯蓣属植物资源的评价和安全食用提供科学依据。更多还原

【Abstract】 Genus of Dioscorea L. are medicinal and edible plants and have important economical values. Mineral elements play an important role in resource evaluation and food safety of Dioscorea L. species. In the study,eleven mineral elements contents of D. alata L., D. opposita Thunb., D. japonica Thunb., D. subcalva Prain et Burkill, D. yunnanensis Prain et Burkill and D. henryi(Prain et Burkill)C. T. Ting were determined by AFFS and AFS. Mineral elements fingerprint was established. Results showed pearson product-moment correlation coefficient and cosine similarity could be used to evaluate the similarity of fingerprint. Fe and Mg were the primary elements in six Dioscorea L. species. The contents of Cu, Zn, Mn, Na and K were between 1 mg/kg and 100 mg/kg. The contents of As and Cd were under 1 mg/kg. Fingerprint similarly was significantly affected by percentage content of Cu, Zn, Pb, Ni, Mg, Fe, Mn, Na and K. The results of the study could provide a scientific evidence for recourse evaluation and food safety of Dioscorea L. species.更多还原