DOI: 10.1016/j.scitotenv.2019.135935
论文题名: Water stress rather than N addition mitigates impacts of elevated O3 on foliar chemical profiles in poplar saplings
作者: Li Z. ; Yang J. ; Shang B. ; Xu Y. ; Couture J.J. ; Yuan X. ; Kobayashi K. ; Feng Z.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 707 语种: 英语
英文关键词: Air pollution
; Chemical defenses
; Drought
; Nutrient availability
; Phytochemistry
; Poplar plantation
Scopus关键词: Air pollution
; Carbohydrates
; Charcoal
; Cotton
; Drought
; Ecosystems
; Lignin
; Nitrogen
; Nutrients
; Plants (botany)
; Soil moisture
; Starch
; Tannins
; Changing environment
; Chemical defense
; Nutrient availability
; Phytochemical composition
; Phytochemistry
; Poplar plantation
; Soil water content
; Soil water deficit
; Forestry
; charcoal
; lignin
; nitrogen
; ozone
; salicinoid
; soil water
; starch
; sugar
; tannin derivative
; unclassified drug
; atmospheric pollution
; chemical defense
; concentration (composition)
; cotton
; drought
; forest ecosystem
; nutrient availability
; ozone
; phytochemistry
; plantation forestry
; troposphere
; water stress
; Article
; bioaccumulation
; biomass
; nitrogen availability
; nitrogen concentration
; nonhuman
; phytochemistry
; plant leaf
; plant response
; Populus
; Populus deltoides
; priority journal
; sapling
; soil water content
; water stress
; Air Pollution
; Carbohydrates
; Charcoal
; Cotton
; Drought
; Ecosystems
; Populus deltoides
英文摘要: Tropospheric ozone (O3) pollution can alter tree chemical profiles, and in turn, affect forest ecosystem function. However, the magnitude of these effects may be modified by variations in soil water and nutrient availability, which makes it difficult to predict the impacts of O3 in reality. Here we assessed the effects of elevated O3 alone, and in combination with soil water deficit and N addition, on the phytochemical composition of hybrid poplar (Populus deltoides cv. ‘55/56’ × P. deltoides cv. ‘Imperial’). Potted trees were grown in open-top chambers (OTCs) under either charcoal-filtered air or elevated O3 (non-filtered air +40 ppb of O3), and trees within each OTC were grown with four combinations of water (well-watered or water deficit) and nitrogen (with or without N addition) levels. We found that elevated O3 alone stimulated the accumulation of foliar nitrogen, soluble sugar, and lignin while inhibiting the accumulation of starch, but had limited impacts on condensed tannins and salicinoids in poplar saplings. Graphical vector analysis revealed that these changes in concentrations of nitrogen, starch and lignin were due largely to altered metabolic processes, while increased soluble sugar concentration related mainly to decreased leaf biomass in most cases. The effects of O3 on poplar foliar chemical profiles depended on soil water, but not soil N, availability. Specifically, O3-mediated changes in carbohydrates and lignin were mitigated by decreased soil water content. Taken together, these results suggested that nitrogen acquisition, carbohydrates mobilization and lignification play a role in poplar tolerance to O3. Moreover, the impacts of elevated O3 on phytochemistry of poplar leaves can be context-dependent, with potential consequences for ecosystem processes under future global change scenarios. Our results highlight the needs to consider multi-factors environments to optimize the management of plantations under changing environments. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158735
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Institute of Chinese Materia Medical, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Departments of Entomology and Forestry and Natural Resources, Purdue University, West Lafayette, IN 47906, United States; Department of Global Agricultural Sciences, The University of Tokyo, Tokyo, Japan; Institute of Ecology, Key Laboratory of Agrometeorology of Jiangsu Province, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China
Recommended Citation:
Li Z.,Yang J.,Shang B.,et al. Water stress rather than N addition mitigates impacts of elevated O3 on foliar chemical profiles in poplar saplings[J]. Science of the Total Environment,2020-01-01,707