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Bioavailable inorganic forms of essential elements in medicinal plants from Northern Poland

作者 Konieczynski, Pawel; Wesolowski, Marek; Radecka, Iwona; Rafalski, Piotr

期刊 CHEMICAL SPECIATION AND BIOAVAILABILITY , MAY 2011,2:23

DOI 10.3184/095422911X13026925862779

摘要 Medicinal plants originating from different natural locations in Northern Poland representing four different plant species: Betula pubescens Ehr., Achillea millefolium L., Urtica dioica L. and Hypericum perforatum L. were analysed. The aim was to determine the contents of P, N, Fe and Zn in these medicinal plants, and to assess the bioavailable inorganic forms of these elements obtained by aqueous extraction. The concentrations of total P and N and their extractable species were determined in mg g(-1) of dry plant weight (dry wt), and the concentrations of N-NO(3), Fe and Zn and their extractable species in the range of mg kg(-1) of dry wt. In all birch leaf samples, the maximum amount of total and extractable Zn was found, whereas the highest total and extractable concentrations of N, P and Fe were obtained in nettle herbs. Statistically significant correlations between 13 pairs of total and extractable forms of studied elements were found. Principal component analysis of the experimental data allowed differentiation of the plant material based on its elemental contents, and identified total P and Zn and its extractable forms, as the crucial factors responsible for that differentiation. Comparison with the dietary reference intakes showed that the plant materials are poor sources of bioavailable P, Fe and Zn, and that contents of nitrates do not exceed the acceptable daily intakes norms.

涉及物种 蓍 Achillea millefolium 贯叶连翘 Hypericum perforatum