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Title: Seasonal differences in trace element concentrations and distribution in Spartina alterniflora root tissue

This study uses nanometer-scale synchrotron X-ray nanofluorescence to investigate season differences in concentrations and distributions of major (Ca, K, S and P) and trace elements (As, Cr, Cu, Fe and Zn) in the root system of Spartina alterniflora collected from Jamaica Bay, New York, in April and September 2015. The root samples were cross-sectioned at a thickness of 10 μm. Selected areas in the root epidermis and endodermis were mapped with a sampling resolution of 100 and 200 nm, varying with the mapping areas. The results indicate that trace element concentrations in the epidermis and endodermis vary among the elements measured, possibly because of their different chemical properties or their ability to act as micronutrients for the plants. Elemental concentrations (As, Ca, Cr, Cu, Fe, K, P, S and Zn) within each individual root sample and between the root samples collected during two different seasons are both significantly different (p < 0.01). Furthermore, this study indicates that the nonessential elements (As and Cr) are significantly correlated (p < 0.01) with Fe, with high concentrations in the root epidermis, while others are not, implying that Fe may be a barrier to nonessential element transport in the root system. Hierarchy cluster analysismore » shows two distinct groups, one including As, Cr and Fe and the other the rest of the elements measured. Factor analysis also indicates that the processes and mechanisms controlling element transport in the root system can be different between the nutrient and nonessential elements.« less
ORCiD logo [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4] ;  [4] ;  [4] ;  [4] ;  [4] ;  [4] ;  [4] ;  [5] ;  [6] ;  [6]
  1. Montclair State Univ., Montclair, NJ (United States). Dept. of Earth and Environmental Studies
  2. Yunnan Univ. (China). School of Ecology and Environmental Sciences
  3. State Univ. of New York (SUNY), Stony Brook, NY (United States). School of Marine and Atmospheric Science
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  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 0045-6535
Grant/Contract Number:
SC0012704; MCB-1051675; AC0298CH10886; P14AC00888; P14AC01395
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 204; Journal Issue: C; Journal ID: ISSN 0045-6535
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Advanced Scientific Computing Research (SC-21); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; US National Park Service (NPS); Montclair State Univ., Montclair, NJ (United States). Sokol Inst.; China Scholarship Council (CSC); National Science Foundation (NSF); American Littoral Society, Highlands, NJ (United States)
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Synchrotron XRF; Spartina alterniflora; Trace elements; Porewater; Metal uptake; Nanoanalysis
OSTI Identifier: