Jiang Feng-juan, Sun Qing-ye, Li Miao, Yu Han-qing
Anhui Key Laboratory of Eco-Engineering and Bio-Technique, School of Life Science, Anhui University, Hefei 230039, China.
Huan Jing Ke Xue. 2008 Jun;29(6):1626-31.
Solution culture experiment was carried out to investigate the effects on the removal efficiencies of N and P by perennial ryegrass (Lolium perenne L.) under the Cu stress and the ecological response of ryegrass to various dosages of Cu2+. The results indicated that the removal efficiencies of N and P decreased under all the intimidating conditions compared with the control tanks, which followed the second-rate equation. The removal efficiencies of N and P and the plant growth at low Cu2+ concentrations (< or = 0.2 mg/L) were higher than those at high Cu2+ concentration (> or = 0.5 mg/L), and the biomass (dry weight) was increased at low Cu2+ concentrations (< or = 0.2 mg/L) relative to control solution. In addition, the plant was able to remove Cu2+ in the eutrophic water simultaneously, and the removal efficiencies under the high Cu2+ concentrations were higher than those under low Cu2+ concentrations. Results show that the root was the main section for accumulating Cu2+ and the data of Cu2+ uptake by perennial ryegrass fitted Michaelis-Menten kinetics equation. Perennial ryegrass were sensitive to Cu2+ treatment. Root elongation was reduced in Cu2+ treatment solutions, but the numbers of new-growth roots increased compared with those cultivated in control solution.
进行了水培试验，以研究铜胁迫下多年生黑麦草（Lolium perenne L.）对氮和磷的去除效率的影响以及黑麦草对不同剂量Cu2+的生态响应。结果表明，与对照池相比，在所有胁迫条件下，氮和磷的去除效率均下降，符合二级反应方程。低Cu2+浓度（≤0.2mg/L）下氮和磷的去除效率及植物生长高于高Cu2+浓度（≥0.5mg/L）时，且相对于对照溶液，低Cu2+浓度（≤0.2mg/L）下生物量（干重）增加。此外，植物能够同时去除富营养化水中的Cu2+，高Cu2+浓度下的去除效率高于低Cu2+浓度下的。结果表明，根部是积累Cu2+的主要部位，多年生黑麦草对Cu2+的吸收数据符合米氏动力学方程。多年生黑麦草对Cu2+处理敏感。在Cu2+处理溶液中根伸长减少，但与对照溶液中培养的相比，新生长根的数量增加。
