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Study of the tolerance of Hippochaete ramosissimum to Cu stress
Dengyi Liu1, Ying Li, Ling Chu
1Biodiversity Research Center, Anhui Normal University, Wuhu 241000, China. ldy@mail.ahnu.edu.cn
Abstract:
We investigated the tolerance of Hippochaete ramosissimum and the changes in physiological metabolism following exposure to copper using pot experiments and analyzing plant physiology and biochemistry. The results showed that Cu tolerance in Hippochaete ramosissimum varied significantly between different populations; the tolerance of plants living in Cu polluted areas for extended periods of time exceeded that of plants living in unpolluted areas. SOD and POD activities in highly Cu tolerant plants increased noticeably following exposure to Cu. This indicates that maintaining and increasing the two kinds of protective enzyme activities are the primary foundations of plant tolerance. However, no change in CAT activity was demonstrated following Cu exposure. In summary, there existed considerable differences in physiological metabolism between different populationsof Hippochaete ramosissimum following exposure to Cu.
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