Responses of anti-oxidative system in leaves of Ginkgo biloba to elevated ozone concentration in urban area

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	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; Ruan, YN, Chinese Acad Sci, Inst Appl Ecol, Dept Urban Forest, 72 Wenhua Rd, Shenyang 110016, Peoples R China
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
英文摘要	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
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
通讯作者	Ruan, YN, Chinese Acad Sci, Inst Appl Ecol, Dept Urban Forest, 72 Wenhua Rd, Shenyang 110016, Peoples R China
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,&Ruan, YN, Chinese Acad Sci, Inst Appl Ecol, Dept Urban Forest, 72 Wenhua Rd, Shenyang 110016, Peoples R China.(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.