Accumulation and Tolerance of Cd in Two Willow Species
Abstract
In order to explore the phytoremediation ability of willow in heavy metal contaminated soil and water, we studied the growth response, accumulation and translocation capacity and antioxidant enzyme activities in Salix matsudana 'J172' (A7) and Salix psammophila 'Huangpi1' (A94) under the stress of Cd (0, 15 and 30 μM) by hydroponic. The results showed that the growth inhibition of A94 was greater than A7 under the stress of different concentrations of Cd. The accumulation of Cd in whole A94 plant was more than that of A7, and the leaves were the main organ that could accumulate Cd. Furthermore, the activity of superoxide dismutase (SOD) in leaves and roots of A7 and A94 is significantly increased and hydrogen peroxide (CAT) and peroxidase (POD) activities were significantly reduced under the stress of Cd. Particularly, Salix psammophila 'Huangpi1' showed better Cd tolerence and had better ability of phytor emediation in Cd contaminated water.
Keywords
Cadmium, Willow, Antioxidant, Accumulation, Tolerance regulation
DOI
10.12783/dteees/gmee2018/27444
10.12783/dteees/gmee2018/27444
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