Responses of anti-oxidative system in leaves of Ginkgo biloba to elevated ozone concentration in urban area | |
He, XY ; Ruan, YN ; Chen, W ; Lu, T | |
刊名 | BOTANICAL STUDIES |
2006 | |
卷号 | 47期号:4页码:409-416 |
关键词 | anti-oxidantive system elevated ozone concentration lipid peroxidation reactive oxygen species |
ISSN号 | 1817-406X |
通讯作者 | Ruan, YN, Chinese Acad Sci, Inst Appl Ecol, Dept Urban Forest, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
中文摘要 | To study the effects of elevated tropospheric ozone concentrations on the anti-oxidative systems of trees, the O-2(-) generating rate, H2O2 content, activities of SOD and all enzymes in the Halliwell-Asada pathway and ascorbic acid content were periodically analyzed in leaves of Ginkgo biloba grown in open-top chambers at either ambient (approximate to 45 nmol mol(-1)) or elevated (80 nmol mol(-1)) ozone concentrations in an urban area for a growing season. The results show that elevated ozone exposure induced a greater superoxide anion (O-2(-)) generating rate and higher hydrogen peroxide (H2O2) content. Malondialdehyde (MDA) content as an index of lipid peroxidation also increased. The activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDAR), glutathione reductase (GR), and dehydroascorbate reductase (DHAR) were enhanced by high ozone exposure in the first half of the season before falling to levels lower than those of control. The ascorbic acid content was always lower in the high-ozone exposed leaves. We conclude that the antioxidant system in Ginkgo biloba did respond by acclimating in the early season. However, the constant higher level of reactive oxygen species and declining enzyme activities late in the season indicate that the system could not withstand the long-term exposure although no visible injury was observed. |
学科主题 | Plant Sciences |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000242121300007 |
公开日期 | 2011-09-23 |
内容类型 | 期刊论文 |
源URL | [http://210.72.129.5/handle/321005/54837] |
专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
推荐引用方式 GB/T 7714 | He, XY,Ruan, YN,Chen, W,et al. Responses of anti-oxidative system in leaves of Ginkgo biloba to elevated ozone concentration in urban area[J]. BOTANICAL STUDIES,2006,47(4):409-416. |
APA | He, XY,Ruan, YN,Chen, W,&Lu, T.(2006).Responses of anti-oxidative system in leaves of Ginkgo biloba to elevated ozone concentration in urban area.BOTANICAL STUDIES,47(4),409-416. |
MLA | He, XY,et al."Responses of anti-oxidative system in leaves of Ginkgo biloba to elevated ozone concentration in urban area".BOTANICAL STUDIES 47.4(2006):409-416. |
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