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Original Articles

Effects of Manganese on Uptake and Translocation of Nutrients in a Hyperaccumulator

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Pages 1737-1751 | Received 22 Feb 2006, Accepted 29 Nov 2006, Published online: 29 Oct 2007
 

ABSTRACT

The effects of manganese (Mn) on the growth and Mn-induced changes in nutrients uptake and translocation in Mn hyperaccumulator Phytolacca acinosa was investigated in this study. Results showed that high Mn (5000 μ M) in culture solution lead to typical Mn toxicity symptoms in leaves of P. acinosa and decrease of dry matter accumulation in shoots whereas there are no obvious toxicity symptoms and significant decrease of dry weight in roots. Manganese accumulation in roots, stems, and leaves increased with the increment of Mn concentration at the medium level. Calcium (Ca), magnesium (Mg), and iron (Fe) concentration in organs of P. acinosa decreased as the Mn concentration in the nutrient solution increased, but the Ca and Mg concentrations were still at a normal level and the Fe concentration at a sufficient level when compared with the normal plants. The Zn concentration affected by higher Mn level occurred only in roots of P. acinosa and the P concentration affected only in stems, whereas there were no significant influences of excess Mn on the potassium (K) and copper (Cu) concentration in organs of P. acinosa.

ACKNOWLEDGMENTS

This work was funded by the Natural Science Foundation of China (No. 40432004 and No. 20677050).

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