生态学杂志2009，Vol.28Issue(11)：2220-2226,7.
O_3与CO_2浓度倍增对油松针叶抗氧化酶活性的影响
Effects of elevated O_3 and CO_2 on the antioxidant enzyme activities in Pinus tabulaeformis needles
摘要
Abstract
Four-year-old Pinus tabulaeformis seedlings were planted in open-topped chambers and treated with elevated O_3(80 nmol·mol~(-1)) and/or CO_2(700 μmol·mol~(-1)). After treated for three years, the malondialdehyde (MDA) content, reactive oxygen species, and antioxidant enzyme activities in the current year needles were analyzed. In treatment elevated O_3, the activi-ties of superoxide dismutase (SOD), aseorbate peroxidase (APX), catalase (CAT) and de-hydroaseorbate reductase (DHAR) increased significantly, being 43. 1%, 18.9%, 283.5% and 142. 6% higher than the control; and in treatments elevated CO_2 and its combination with el-evated O_3, only APX and CAT activities were induced remarkably but still lower than those in treatment elevated O_3. Elevated O_3 increased the MDA content by 51.8%, whereas the combina-tion of elevated O_3 and CO_2 reversed this increase efficiently. No significant differences were ob-served in the superoxide anion (O_2~-·) generating rate and H_2O_2 content among all treatments. All the results demonstrated that elevated O_3 was able to effectively activate the antioxidant enzyme system in P. Tabulaeformis current year needles, while elevated CO_2 could mitigate the negative effects of elevated O_3 through the actions other than enhancing the antioxidant enzyme activities.关键词
高浓度O_3/高浓度CO_2/油松/抗氧化系统Key words
elevated O_3/ elevated CO_2/ Pinus tabulaeformis/ antioxidant system分类
生物科学引用本文复制引用
李响,何兴元,陈玮,徐胜,颜坤..O_3与CO_2浓度倍增对油松针叶抗氧化酶活性的影响[J].生态学杂志,2009,28(11):2220-2226,7.基金项目
国家自然科学基金重大研究计划重点项目(90411019)和中国科学院知识创新工程重要方向资助项目(KZCX3-SW-436). （90411019）
