DOI: 10.1016/j.atmosenv.2017.12.039
Scopus记录号: 2-s2.0-85040085051
论文题名: Exposure- and flux-based assessment of ozone risk to sugarcane plants
作者: Moura B ; B ; , Hoshika Y ; , Ribeiro R ; V ; , Paoletti E
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 176 起始页码: 252
结束页码: 260
语种: 英语
英文关键词: Air pollution
; Ozone FACE
; PODy
; Stomatal conductance
; Sugarcane
; Tropospheric ozone
Scopus关键词: Atmospheric temperature
; Biomass
; Crops
; Dysprosium compounds
; Forestry
; Ozone
; Pollution
; Risk assessment
; Sugar cane
; Above ground biomass
; Controlled experiment
; Environmental conditions
; Environmental factors
; PODy
; Stomatal conductance
; Tropospheric ozone
; Vapor pressure deficit
; Air pollution
; ozone
; air temperature
; biomass
; concentration (composition)
; environmental conditions
; experimental study
; light intensity
; ozone
; parameterization
; risk assessment
; stomatal conductance
; sugar cane
; vapor pressure
; air temperature
; algorithm
; ambient air
; Article
; biomass
; climate
; concentration (parameters)
; environmental exposure
; genotype
; leaf biomass
; light intensity
; nonhuman
; priority journal
; risk assessment
; stalk biomass
; stomatal conductance
; sugarcane
; total above ground biomass
; vapor pressure
; Saccharum
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Ozone (O3) is a toxic oxidative air pollutant, with significant detrimental effects on crops. Sugarcane (Saccharum spp.) is an important crop with no O3 risk assessment performed so far. This study aimed to assess O3 risk to sugarcane plants by using exposure-based indices (AOT40 and W126) based on O3 concentrations in the air, and the flux-based index (PODy, where y is a threshold of uptake) that considers leaf O3 uptake and the influence of environmental conditions on stomatal conductance (gsto). Two sugarcane genotypes (IACSP94-2094 and IACSP95-5000) were subjected to a 90-day Free-Air Controlled Experiment (FACE) exposure at three levels of O3 concentrations: ambient (Amb); Amb x1.2; and Amb x1.4. Total above-ground biomass (AGB), stalk biomass (SB) and leaf biomass (LB) were evaluated and the potential biomass production in a clean air was estimated by assuming a theoretical clean atmosphere at 10 ppb as 24 h O3 average. The Jarvis-type multiplicative algorithm was used to parametrize gsto including environmental factors i.e. air temperature, light intensity, air vapor pressure deficit, and minimum night-time temperature. Ozone exposure caused a negative impact on AGB, SB and LB. The O3 sensitivity of sugarcane may be related to its high gsto (∼535 mmol H2O m−2 s−1). As sugarcane is adapted to hot climate conditions, gsto was restricted when the current minimum air temperature (Tmin) was below ∼14 °C and the minimum night-time air temperature of the previous day (Tnmin) was below ∼7.5 °C. The flux-based index (PODy) performed better than the exposure-based indices in estimating O3 effect on biomass losses. We recommend a y threshold of 2 nmol m−2 s−1 to incorporate O3 effects on both AGB and SB and 1 nmol m−2 s−1 on LB. In order not to exceed 4% reduction in the growth of these two sugarcane genotypes, we recommend the following critical levels: 1.09 and 1.04 mmol m−2 POD2 for AGB, 0.91 and 0.96 mmol m−2 POD2 for SB, and 3.00 and 2.36 mmol m−2 POD1 for LB of IACSP95-5000 and IACSP94-2094, respectively. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83023
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil; National Research Council, Via Madonna del Piano 10, Sesto Fiorentino, Italy
Recommended Citation:
Moura B,B,, Hoshika Y,et al. Exposure- and flux-based assessment of ozone risk to sugarcane plants[J]. Atmospheric Environment,2018-01-01,176