N. Golubkina1*,
U. Plotnikova1, Z. Amagova2, S. Sheshnitsan3
1 Federal
Scientific Vegetable Center,
Selectsionnaya 14, pos. VNIISSOK, Odintsovsky district, Moscow region, 143072,
Russian Federation
2 Chechen
Agricultural Institute,
Lilovaya 1, Grozny, Chechen republic, 366021, Russian Federation
3 Voronezh
State University of Forestry and Technologies,
Timiryazeva 8, Voronezh, 394036, Russian Federation
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ABSTRACT. Willow bark is highly valuable in medicine, different branches of
industry and ecology. In this respect antioxidants and minerals distribution
between bark tissues seems to be highly valuable. Using ICP-MS mineral
composition of willow bark cambium, phloem and periderm was determined for the
first time. Predominance of P, K and Ca was recorded for cambium characterized
by intensive metabolism. On the contrary, periderm demonstrated the highest
concentrations of all heavy metals, except Ni, Al and As, and the highest
coefficients of variation compared to phloem and cambium, especially for Al
(107.5%), Pb (112.2%), V (133.3%), and Sn (90.9%). Though trace elements also
prevail in periderm, low coefficient of variation between tissues indicates the
importance of Fe, Mn, B, Zn, Cu and Mo in plants growth. Among tissues studied
cambium recorded the highest antioxidant activity with relatively similar
values of polyphenol content compared to periderm and phloem data. The results
prove high prospects of willow bark cambium utilization as a valuable source of
antioxidants and trace elements and of periderm as a natural adsorbent.
KEYWORDS: willow bark, periderm, phloem, cambium, antioxidants, minerals.