Author(s)

Xiaoying Xu^1*, Yikun Xu¹, Yuan Chi¹, Penghe Wang², Guoxin Shi³

¹College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China.
²College of Life Science, Nanjing University, Nanjing, China.
³College of Life Science, Nanjing Normal University, Nanjing, China.

Changes of various mineral elements (P, K, Ca, Mg, Fe, Mn, Zn and Na) contents in roots and leaves of S. sagittifolia were studied with treatment of different Cu²⁺ concentrations (5 μM, 10 μM, 20 μM and 40 μM) after 15 days. The results showed that: 1) Cu accumulated in roots of S. sagittifolia in large quantities, while Cu content in leaves showed no significant change; 2) It can be seen from the changes of macroelements that Cu²⁺ treatments had inhibited the absorption of P, K, Ca, Mg in roots of S. sagittifolia, but the contents of P, K and Mg in leaves were higher than those in the roots in all Cu2+ treatment groups; 3) It can be seen from the changes of microelements that Cu²⁺ treatment promoted the absorption of Fe, inhibited absorption of Mn, Zn and Na in roots of S. sagittifolia, and hindered the transport of various micro-elements from roots to leaves. In all the Cu²⁺ treatment groups, contents of Fe, Mn, Zn and Na in leaves were lower than those in the roots; 4) The critical concentration of Cu²⁺ to S. sagittifolia was 5 μM. It could be seen from the above results that exogenous added Cu²⁺ of different concentrations broke the balance of various mineral elements in S. sagittifolia, which would exert a significant impact on numerous metabolic pathways and physiological processes.

Sagittaria sagittifolia, Cu²⁺, Macroelements, Microelements

Xu, X. , Xu, Y. , Chi, Y. , Wang, P. and Shi, G. (2015) Changes of Essential Mineral Elements Contents in Response to Cu²⁺ Treatment in Sagittaria sagittifolia. Journal of Environmental Protection, 6, 700-709. doi: 10.4236/jep.2015.67063.