DOI: 10.1111/gcb.12237
论文题名: Chronic ozone exacerbates the reduction in photosynthesis and acceleration of senescence caused by limited N availability in Nicotiana sylvestris
作者: Yendrek C.R. ; Leisner C.P. ; Ainsworth E.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 10 起始页码: 3155
结束页码: 3166
语种: 英语
英文关键词: Air pollution
; Climate change
; N allocation
; Primary metabolism
; Senescence
Scopus关键词: atmospheric pollution
; carbon dioxide
; climate change
; growth rate
; growth response
; metabolism
; ozone
; perennial plant
; photosynthesis
; soil fertility
; soil nitrogen
; Nicotiana
; Nicotiana sylvestris
; Nicotiana tabacum
; carbon dioxide
; chlorophyll
; chlorophyll a
; chlorophyll b
; nitrogen
; ozone
; air pollutant
; air pollution
; article
; climate change
; drug effect
; metabolism
; N allocation
; photosynthesis
; physiology
; plant leaf
; plant root
; plant stem
; primary metabolism
; senescence
; tobacco
; air pollution
; climate change
; N allocation
; primary metabolism
; senescence
; Air Pollutants
; Carbon Dioxide
; Chlorophyll
; Nitrogen
; Ozone
; Photosynthesis
; Plant Leaves
; Plant Roots
; Plant Stems
; Tobacco
英文摘要: Both elevated ozone (O3) and limiting soil nitrogen (N) availability negatively affect crop performance. However, less is known about how the combination of elevated O3 and limiting N affect crop growth and metabolism. In this study, we grew tobacco (Nicotiana sylvestris) in ambient and elevated O3 at two N levels (limiting and sufficient). Results at the whole plant, leaf, and cellular level showed that primary metabolism was reduced by growth in limiting N, and that reduction was exacerbated by exposure to elevated O3. Limiting N reduced the rates of photosynthetic CO2 uptake by 40.8% in ambient O3-exposed plants, and by 58.6% in elevated O3-exposed plants, compared with plants grown with sufficient N. Reductions in photosynthesis compounded to cause large differences in leaf and whole plant parameters including leaf number, leaf area, and leaf and root biomass. These results were consistent with our meta-analysis of all published studies of plant responses to elevated O3 and N availability. In tobacco, N uptake and allocation was also affected by growth in limiting N and elevated O3, and there was an O3-induced compensatory response that resulted in increased N recycling from senescing leaves. In addition, transcript-based markers were used to track the progress through senescence, and indicated that limiting N and elevated O3, separately and in combination, caused an acceleration of senescence. These results suggest that reductions in crop productivity in growing regions with poor soil fertility will be exacerbated by rising background O3. © 2013 John Wiley & Sons Ltd1910 October 2013 10.1111/gcb.12237 Primary Research Article Primary Research Articles Published 2013. This article is a U.S. Government work and is in the public domain in the USA. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62316
Appears in Collections: 影响、适应和脆弱性
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作者单位: USDA ARS Global Change and Photosynthesis Research Unit, 1201 W. Gregory Drive, Urbana, IL, 61801, United States; Department of Plant Biology, University of Illinois, Urbana-Champaign, Urbana, IL, 61801, United States
Recommended Citation:
Yendrek C.R.,Leisner C.P.,Ainsworth E.A.. Chronic ozone exacerbates the reduction in photosynthesis and acceleration of senescence caused by limited N availability in Nicotiana sylvestris[J]. Global Change Biology,2013-01-01,19(10)