Lanthanum Relieved Toxic Effects Caused by Nickel in Hydrocharis dubia B L. Backer Leaves
来源期刊：JOURNAL OF RARE EARTHS2003年第2期
论文作者：曾晓敏 周红卫 谷巍 张小兰 施国新 徐楠 徐勤松
Key words：potany; rare earths; lanthanum; nickel; hydrocharis dubia B L. Backer; stress; relieving;
Abstract: The paper briefly dealt with relieving toxic effects of La on high aquatic plant-Hydrocharis dubia B L. Backer growing in the solution containing different concentration of Ni. The results show that La can relieve the reduction of chlorophyll content, the accumulation of MDA(malondiadehyde) and the elevation of relative membrane penetrability (RMP). After adding 10 mg*L-1 La to the solution, the activities of SOD and CAT in the leaves of Hydrocharis dubia B L. Backer increases compared with those of the single treatment of Ni, while the activity of POD decreases. It reveals that La enhances the abilities of scavenging the activated oxygen in the plant and alleviates the damage to the membranes. The soluble protein content with Ni and La compound treatment is higher than that of single Ni does, and proline content is contrary to the soluble protein content. So La improves the resistance of Hydrocharis dubia B. L. Backer to the stress of Ni. However, La can aggravate the damage to the cells under the extremely high concentration of Ni treatment.
曾晓敏1，周红卫1，谷巍1，张小兰1，施国新1，徐楠1，徐勤松1
(1.College of Life Science, Nanjing Normal University, Nanjing 210097, China)
Abstract:The paper briefly dealt with relieving toxic effects of La on high aquatic plant-Hydrocharis dubia B L. Backer growing in the solution containing different concentration of Ni. The results show that La can relieve the reduction of chlorophyll content, the accumulation of MDA(malondiadehyde) and the elevation of relative membrane penetrability (RMP). After adding 10 mg*L-1 La to the solution, the activities of SOD and CAT in the leaves of Hydrocharis dubia B L. Backer increases compared with those of the single treatment of Ni, while the activity of POD decreases. It reveals that La enhances the abilities of scavenging the activated oxygen in the plant and alleviates the damage to the membranes. The soluble protein content with Ni and La compound treatment is higher than that of single Ni does, and proline content is contrary to the soluble protein content. So La improves the resistance of Hydrocharis dubia B. L. Backer to the stress of Ni. However, La can aggravate the damage to the cells under the extremely high concentration of Ni treatment.
Key words:potany; rare earths; lanthanum; nickel; hydrocharis dubia B L. Backer; stress; relieving;
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