Lead Content in Pot Marigold (<Emphasis Type="Italic">Calendula officinalis</Emphasis> L.) Inflorescences and Leaves: Impact of Precipitations and Vicinity of Motorway |
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Authors: | Andres Meos Tiiu Jüriado Vallo Matto Ain Raal |
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Institution: | (1) Department of Pharmacy, University of Tartu, Nooruse 1, 50441 Tartu, Estonia; |
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Abstract: | Trace metal contamination is a major environmental and health problem virtually in all countries. The present study was aimed
to estimate the lead content of pot marigold (Calendula officinalis L.) inflorescences and leaves collected from a nonpolluted test field. The lead content in dry pot marigold inflorescences
was 9.34 ± 0.79 μg/g, in dry leaves 11.57 ± 0.47 μg/g, and in soil 0.649 ± 0.012 μg/g. The distance of pot marigold collection
beds (30–220 m from the motorway) had no effect on lead content. There was a strong positive correlation between the amount
of precipitations and lead content of pot marigold leaves but not inflorescences indicating the soil as primarily the source
of increased lead content. In conclusion, no effect of motorway vicinity was found for pot marigold inflorescences or leaves
lead content; however, as a precaution, it is not recommended to collect the plants during or just after showers. |
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