Changes in effects of ozone exposure on growth, photosynthesis, and respiration of Ginkgo biloba in Shenyang urban area

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	Changes in effects of ozone exposure on growth, photosynthesis, and respiration of Ginkgo biloba in Shenyang urban area
	He, XY ; Fu, SL ; Chen, W ; Zhao, TH ; Xu, S ; Tuba, Z
刊名	PHOTOSYNTHETICA
	2007
卷号	45 期号:4 页码:555-561
关键词	carboxylation efficiency chlorophyll dark respiration gas exchange intercellular CO2 concentration leaf area index non-stomatal limitations photorespiration stomatal conductance transpiration rate
ISSN号	0300-3604
通讯作者	Fu, SL, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
中文摘要	An open-top chamber experiment was carried out from April through October 2006 to examine the effects of elevated (80 nmol mol(-1)) atmospheric O-3 on Ginkgo biloba (4-years-old) in urban area. The air with ambient O-3 (AA, approximate to 45 nmol mol-1) was used as control. The leaf mass and size, leaf area index, net photosynthetic rate (PN), apparent quantum yield, transpiration rate, and stomatal conductance were decreased by elevated 03 (EO) exposure. Visible foliar injury, which is light-brown flecks, was observed in the EO OTCs after 90 d of exposure. Carboxylation efficiency (Phi(CO2)) and photorespiration and dark respiration rates were enhanced by EO exposure in the first half of the season, but all of them turned to be lower than those of the AA control at the end of experiment. Stomata limitation of photosynthesis was significantly higher than control in the whole season (p<0.05). Chlorophyll (Chl) content was lower in EO variant than in the control and the difference became more and more apparent through the season. Hence the decrease in PN of G. biloba exposed to EO was the result of both stomatal and non-stomatal limitations. In the early season, the inhibition of photosynthesis was mainly caused by the stomatal limitation, and the earliest response was photoprotective down-regulation of photosynthesis but not photodamage. However, at the end of the season, the non-stomatal limiting factors such as decrease in Chl content, decrease in Phi(CO2), and anti-oxidative enzyme activity became more important.
学科主题	Plant Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000252506500011
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54547]
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,Fu, SL,Chen, W,et al. Changes in effects of ozone exposure on growth, photosynthesis, and respiration of Ginkgo biloba in Shenyang urban area[J]. PHOTOSYNTHETICA,2007,45(4):555-561.
APA	He, XY,Fu, SL,Chen, W,Zhao, TH,Xu, S,&Tuba, Z.(2007).Changes in effects of ozone exposure on growth, photosynthesis, and respiration of Ginkgo biloba in Shenyang urban area.PHOTOSYNTHETICA,45(4),555-561.
MLA	He, XY,et al."Changes in effects of ozone exposure on growth, photosynthesis, and respiration of Ginkgo biloba in Shenyang urban area".PHOTOSYNTHETICA 45.4(2007):555-561.