Effect Of Copper On Small Brassinca Chinensis Growth And Protective Enzyme Activity

The study with pot experiment showed effect of the different concentrations of copper on the growth of small Brassinca chinensis and distribution and accumulation of copper in the plant, and to explore adaptability of heavy metals to the plant , in a simulated test conditions, The study showed the copper had effect on the height of plant, leaf area, biomass, SPAD, malondialdehyde (MDA), peroxide enzyme (POD) activity, superoxide dismutase (SOD) activity, proline, and the accumulation of copper in the plant, to reveal the plant effects of copper pollution, to provide a scientific basis for the copper pollution control.By determining the plant height, biomass of small brassinca chinensis at 20 days and 40 days, The results reflected that low concentrations of Cu (< 25 mg·kg- 1) had obvious promoted effects on the growth of the plant, and high concentrations of (25~100 mg·kg– 1) had obvious inhibitory effects on the growth of plant, with the growth of small Brassinca chinensis, copper did more serious harm to the plant. Low concentration copper can promote the synthesis of chlorophyll, however, at the high Cu concentration, chlorophyll content significantly decreasedThe study with pot experiment showed that the effect of copper on protective enzyme activity of small Brassinca chinensis, the results showed that: when at 20 days and 40 days of small Brassinca chinensis, low concentrations copper had no obvious impact on MDA content, peroxide enzyme (POD) activity, superoxide dismutase (SOD) activity, proline content, and high concentration copper significantly increase the plant in MDA and proline content, and significantly raising peroxidase activity in the plant, but reduced superoxide dismutase (SOD) Activity. With the growth of small Brassinca chinensis, these indicators changed even more obviously. When Copper pollution of soil was more serious, the copper content of small brassinca chinensis was larger, and mainly accumulated in the roots, with the growth of small brassinca chinensis, the extension of the copper pollution levels increased, the biomass of small Brassinca chinensis dramatically reduced, leading to a decline in copper accumulation.