DOI: 10.1016/j.atmosenv.2017.06.024
Scopus记录号: 2-s2.0-85020846259
论文题名: Concentrations and nitrogen isotope compositions of free amino acids in Pinus massoniana (Lamb.) needles of different ages as indicators of atmospheric nitrogen pollution
作者: Xu Y ; , Xiao H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 348
结束页码: 359
语种: 英语
英文关键词: Age
; Atmospheric N sources
; Free amino acid δ15N
; Needles
; Pinus massoniana Lamb.
Scopus关键词: Arginine
; Deposition
; Needles
; Nitrogen
; Plants (botany)
; Transportation
; Acid concentrations
; Atmospheric nitrogen
; Free amino acids
; Gamma-aminobutyric acids
; Nitrogen isotopes
; Pinus massoniana Lamb
; Sensitive indicator
; Strong correlation
; Amino acids
; 4 aminobutyric acid
; alanine
; amino acid
; arginine
; aspartic acid
; glutamine
; histidine
; isoleucine
; isotope
; lysine
; nitrogen
; nitrogen 15
; proline
; serine
; valine
; age determination
; amino acid
; atmospheric deposition
; atmospheric pollution
; bioindicator
; concentration (composition)
; coniferous tree
; correlation
; environmental indicator
; isotopic composition
; nitrogen isotope
; air pollution
; Article
; forest
; highway
; moss
; pine
; Pinus massoniana
; priority journal
; soil
; China
; Guiyang
; Guizhou
; Bryophyta
; Pinus massoniana
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: Free amino acid δ15N values and concentrations of current-year new (new), current-year mature (middle-age) and previous-year (old) Pinus massoniana (Lamb.) needles were determined for five sites with different distances from a highway in a forest in Guiyang (SW China). Needle free amino acid concentrations decreased with increasing distance from the highway, and only the free amino acid concentrations (total free amino acid, arginine, γ-aminobutyric acid, valine, alanine and proline) in the middle-aged needles demonstrated a strong correlation with distance from the highway, indicating that free amino acid concentrations in middle-aged needles may be a more suitable indicator of nitrogen (N) deposition compared to new and old needles. Needle free amino acid δ15N values were more positive near the highway compared to the more distant sites and increased with increasing needle age, indicating that N deposition in this site may be dominated by isotopically heavy NOx-N from traffic emissions. In sites beyond 400 m from the highway, the δ15N values of total free amino acids, histidine, glutamine, proline, alanine, aspartate, isoleucine, lysine, arginine and serine in each age of needle were noticeably negative compared to their respective δ15N values near the highway. This suggested that needle free amino acid δ15N values from these sites were more affected by 15N-depleted atmospheric NHx-N from soil emissions. This result was further supported by the similarity in the negative moss δ15N values at these sites to the δ15N values of soil-derived NHx-N. Needle free amino acid δ15N values therefore have the potential to provide information about atmospheric N sources. We conclude that needle free amino acid concentrations are sensitive indicators of N deposition and that the age-related free amino acid δ15N values in needles can efficiently reflect atmospheric N sources. This would probably promote the application of the combined plant tissue amino acid concentration and δ15N analyses in N deposition bio-monitoring. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82287
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, No. 99, Linchengxi Road, Guiyang, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Xu Y,, Xiao H. Concentrations and nitrogen isotope compositions of free amino acids in Pinus massoniana (Lamb.) needles of different ages as indicators of atmospheric nitrogen pollution[J]. Atmospheric Environment,2017-01-01,164