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Title: Nanoscale measurement of trace element distributions in Spartina alterniflora root tissue during dormancy

Here, this article reports a nanometer-scale investigation of trace element (As, Ca, Cr, Cu, Fe, Mn, Ni, S and Zn) distributions in the root system Spartina alterniflora during dormancy. The sample was collected on a salt marsh island in Jamaica Bay, New York, in April 2015 and the root was cross-sectioned with 10 μm resolution. Synchrotron X-ray nanofluorescence was applied to map the trace element distributions in selected areas of the root epidermis and endodermis. The sampling resolution was 60 nm to increase the measurement accuracy and reduce the uncertainty. The results indicate that the elemental concentrations in the epidermis, outer endodermis and inner endodermis are significantly (p < 0.01) different. The root endodermis has relatively higher concentrations of these elements than the root epidermis. Furthermore, this high resolution measurement indicates that the elemental concentrations in the outer endodermis are significantly (p < 0.01) higher than those in the inner endodermis. These results suggest that the Casparian strip may play a role in governing the aplastic transport of these elements. Pearson correlation analysis on the average concentrations of each element in the selected areas shows that most of the elements are significantly (p < 0.05) correlated, which suggests that thesemore » elements may share the same transport pathways.« less
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Montclair State Univ., NJ (United States). Dept. of Earth and Environmental Studies
  2. State Univ. of New York (SUNY), Stony Brook, NY (United States). School of Marine and Atmospheric Science
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Shenyang Agricultural Univ. (China). College of Land and Environment
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Computational Science Center
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Biological Sciences Dept.
Publication Date:
Report Number(s):
Journal ID: ISSN 2045-2322
Grant/Contract Number:
SC0012704; AC0298CH10886; MCB-1051675
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); China Scholarship Council
Country of Publication:
United States
OSTI Identifier: