Abstract
The aim of this study was to evaluate the dynamics of Mn in ‘soil - raspberry’ system on the area around the manganese ore deposits Radostovo in Bužim municipality. Atomic absorption spectroscopy was used to determine the concentration of Mn in soil and plant samples. Fe, Zn and Cu concentration in soil and raspberry plants was also subject of analysis, since these elements have antagonistic relationship with Mn in soils. The concentration of available Mn in soils was low, although the total Mn in the same soils exceeded the Mn toxic values noted in the scientific literature. The chemical and physical properties of the examined soils characterized by a relatively high pH value and good ability to store root-zone air certainly contributed to the decreasing release of available Mn2+ from manganese oxides in soils as well as Mn2+ oxidation to insoluble Mn3+ or Mn4+ ions, resulting in low uptake of Mn by plant roots. The results of study also showed that the absorbed Mn mostly accumulates in leaves and roots of raspberry, and much less in the stem and fruits. That rule in Mn distribution within raspberry plant is in fact identical to all food crops.
Highlights
Manganese (Mn) is a mineral element that is both essential and potentially toxic for plant
Mn participates in the structure of photosynthetic proteins and enzymes playing an important role in water-splitting system of photosystem II, which provides the necessary electrons for photosynthesis (Mousavi et al, 2011)
The results have shown that the concentration of Fe, Zn and Cu in the examined plant parts was relatively low in comparison with the permissible limits of heavy metals in food crops reported by FAO/WHO (2001)
Summary
Manganese (Mn) is a mineral element that is both essential and potentially toxic for plant. It is essential for many plant functions, for antioxidant defense system in plants as an enzyme antioxidant-cofactor (Millaleo et al, 2010). Mn participates in the structure of photosynthetic proteins and enzymes playing an important role in water-splitting system of photosystem II, which provides the necessary electrons for photosynthesis (Mousavi et al, 2011). An excess of Mn is toxic for plants. Excess of Mn in plants resulting in a reduction of biomass and photosynthesis, disturbances in absorption, translocation and utilization of mineral elements Ca, Mg, Fe, P and biochemical disorders such as oxidative stress (Lei et al, 2007)
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