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Chemical and anatomical changes in Liquidambar styraciflua L. xylem after long term exposure to elevated CO2

Journal Article · · Environmental Pollution
 [1];  [1];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Climate Change Science Inst. and Environmental Sciences Division
  3. USDA-Forest Service, Southern Research Station, Pineville, LA (United States)
The anatomical and chemical characteristics of sweetgum were studied after 11 years of elevated CO2 (544 ppm, ambient at 391 ppm) exposure. Anatomically, branch xylem cells were larger for elevated CO2 trees, and the cell wall thickness was thinner. Chemically, elevated CO2 exposure did not impact the structural components of the stem wood, but non-structural components were significantly affected. Principal component analysis (PCA) was employed to detect differences between the CO2 treatments by considering numerous structural and chemical variables, as well as tree size, and data from previously published sources (for example, root biomass, production and turnover). The PCA results indicated a clear separation between trees exposed to ambient and elevated CO2 conditions. Lastly, correlation loadings plots of the PCA revealed that stem structural components, ash, Ca, Mg, total phenolics, root biomass, production and turnover were the major responses that contribute to the separation between the elevated and ambient CO2 treated trees.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1261416
Alternate ID(s):
OSTI ID: 22456429
OSTI ID: 1259359
Journal Information:
Environmental Pollution, Journal Name: Environmental Pollution Journal Issue: C Vol. 198; ISSN 0269-7491
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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