Authors: Jian Nie Yunguo Liu Guangming Zeng Bohong Zheng Xiaofei Tan Huan Liu Jieli Xie Chao Gan Wei Liu
Publish Date: 2016/02/15
Volume: 23, Issue: 10, Pages: 10189-10199
Abstract
Heavy metal pollution is a major concern of the public due to their threats to the safety of food chains A 60day pot experiment was conducted using Macleaya cordata as plant material to investigate the phytoremediation potential and antioxidative responses of M cordata under different Cd stress Significant growth inhibition phenomenon and toxic symptoms were not detected in the experiment The high biomass of the plant provided high accumulation capacity for Cd with an average dry weight of 36 g The maximum extraction amount of Cd was 393 μg·plant−1 suggesting that this species had potential for phytoremediation of Cdcontaminated soil A slight increase of chlorophyll CHL content was observed in Cd10 treatment The plant was confirmed to have relatively high tolerance to the Cd stress on the basis of tolerance indexes TI relative water content and CHLa/CHLb ratio M cordata could maintain high level of superoxide dismutase SOD activity under Cd stress indicating strong tolerance capacity for reactive oxygen species ROS in plant cells Catalase CAT activity show a certain range of decline in the experiment compare to the control And peroxidase POD activity in leaves changed irregularly when compared to the control The malondialdehyde MDA content increased as Cd concentration elevated compared to the control In addition as an inedible crop with relatively high economic value M cordata have shown the advantage of high biomass and high tolerance under Cd stress which can provide a new plant resource for sustainable phytoremediation
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