Articles
INFLUENCE OF SOME SOIL CHARACTERISTICS ON HEAVY METAL CONTENT IN HYPERICUM PERFORATUM L. AND ACHILLEA MILLEFOLIUM L.
Article number
576_44
Pages
295 – 301
Language
English
Abstract
Hypericum perforatum L. and Achillea millefolium L. are plants which can be characterized as heavy metal accumulators.
Including relating soils samples differing in pH reaction, 14 samples of St.
Johns wort and 9 samples of yarrow were collected from different localities in Yugoslavia and Republic Srpska.
The total heavy metal content (Mn, Zn, Cu, Pb, Ni and Cd) was determined in the collected herb material (for St.
Johns wort 25 cm from the top of plant and for yarrow 30 cm) by standard analytical methods.
Heavy metal content in the herb mostly dependent on soil composition, for both species.
Concentration of Mn and Zn in the herb decreased linearly with the increase of soil pH (Mn: r = – 0.62* for yarrow and r = – 0.66* for St.
Johns wort; Zn: r = – 0.71* for yarrow and r = – 0.62* for St.
Johns wort), while Cd concentration decreased exponentially (r = – 0.77* for yarrow and r = – 0.58* for St.
Johns wort). Cd content in St.
Johns wort was mostly above limit of 0.5 ppm when soil pH (in nKCl) was lower than 5.9, and 4.5 for yarrow.
Higher Cd content in the yarrow herb, and especially St.
Johns wort herb from acidic soils, points to significance of: 1. Required control of Cd content in the raw materials collected in the wild and 2. Necessary avoidance of such soils for cultivated production of those species.
A relationship of Ni content in the herb with soil pH was found only for St.
Johns wort (r = – 0.80***).
Correlation between heavy metal content in the herb and humus content in the soil was analyzed but statistically significant regression coefficients were not obtained.
Positive linear dependence was found between Pb and Ni content in the herb and their total content in the soil, for Achillea millefolium L. (r = 0.88** and r = 0.65*, respectively), which can be explained by the origin of the samples.
Also, there is increase of Cu, Pb and Ni content in the yarrow herb with the increase of their available content in the soil (r = 0.67*, r = 0.88**, r = 0.65 *, respectively), while such dependence was obtained only for Pb content in St.
Johns wort herb (0.56*).
Including relating soils samples differing in pH reaction, 14 samples of St.
Johns wort and 9 samples of yarrow were collected from different localities in Yugoslavia and Republic Srpska.
The total heavy metal content (Mn, Zn, Cu, Pb, Ni and Cd) was determined in the collected herb material (for St.
Johns wort 25 cm from the top of plant and for yarrow 30 cm) by standard analytical methods.
Heavy metal content in the herb mostly dependent on soil composition, for both species.
Concentration of Mn and Zn in the herb decreased linearly with the increase of soil pH (Mn: r = – 0.62* for yarrow and r = – 0.66* for St.
Johns wort; Zn: r = – 0.71* for yarrow and r = – 0.62* for St.
Johns wort), while Cd concentration decreased exponentially (r = – 0.77* for yarrow and r = – 0.58* for St.
Johns wort). Cd content in St.
Johns wort was mostly above limit of 0.5 ppm when soil pH (in nKCl) was lower than 5.9, and 4.5 for yarrow.
Higher Cd content in the yarrow herb, and especially St.
Johns wort herb from acidic soils, points to significance of: 1. Required control of Cd content in the raw materials collected in the wild and 2. Necessary avoidance of such soils for cultivated production of those species.
A relationship of Ni content in the herb with soil pH was found only for St.
Johns wort (r = – 0.80***).
Correlation between heavy metal content in the herb and humus content in the soil was analyzed but statistically significant regression coefficients were not obtained.
Positive linear dependence was found between Pb and Ni content in the herb and their total content in the soil, for Achillea millefolium L. (r = 0.88** and r = 0.65*, respectively), which can be explained by the origin of the samples.
Also, there is increase of Cu, Pb and Ni content in the yarrow herb with the increase of their available content in the soil (r = 0.67*, r = 0.88**, r = 0.65 *, respectively), while such dependence was obtained only for Pb content in St.
Johns wort herb (0.56*).
Authors
D. Radanovic, S. Antic-Mladenovic, M. Jakovljevic
Keywords
yarrow, St. John’s wort, Mn, Zn, Cu, Pb, Ni and Cd
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