Lu Tao, He Xingyuan, Chen Wei, Yan Kun, Zhao Tianhong
Department of Urban Forest, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, People's Republic of China.
Bull Environ Contam Toxicol. 2009 Jul;83(1):92-6. doi: 10.1007/s00128-009-9719-3. Epub 2009 Apr 7.
Four-year-old seedlings of Ginkgo biloba were exposed to elevated O(3), elevated CO(2) and elevated O(3) plus elevated CO(2) in open-top chambers (OTCs) to study the responses of antioxidant system in Ginkgo biloba leaves. No significant changes in reactive oxygen production and scavenging systems were detected in seedlings exposed to high CO(2). Significant increase in H(2)O(2) and MDA content were induced by elevated O(3). The ascorbate content and antioxidative enzymes activity were increased significantly by exposure to high O(3) as well. But the promoted ability in scavenging did not prevent the increase in H(2)O(2) content and cell membrane lipid peroxidation. The increase was mitigated by high CO(2) in the combined exposure, but the effect was hardly significant.
将四年生银杏幼苗置于开顶式气室（OTC）中，分别暴露于高浓度臭氧（O₃）、高浓度二氧化碳（CO₂）以及高浓度臭氧加二氧化碳环境下，以研究银杏叶片抗氧化系统的响应。暴露于高浓度二氧化碳的幼苗中，活性氧产生和清除系统未检测到显著变化。高浓度臭氧诱导了过氧化氢（H₂O₂）和丙二醛（MDA）含量显著增加。暴露于高浓度臭氧也显著提高了抗坏血酸含量和抗氧化酶活性。但清除能力的增强并不能阻止H₂O₂含量增加和细胞膜脂质过氧化。在联合暴露中，高浓度二氧化碳减轻了这种增加，但效果不显著。
