TY - JOUR
T1 - Synchrotron micro-scale study of trace metal transport and distribution in Spartina alterniflora root system in Yangtze River intertidal zone
AU - Feng, Huan
AU - Zhang, Weiguo
AU - Liu, Wenliang
AU - Yu, Lizhong
AU - Qian, Yu
AU - Wang, Jun
AU - Wang, Jia Jun
AU - Eng, Christopher
AU - Liu, Chang Jun
AU - Jones, Keith W.
AU - Tappero, Ryan
N1 - Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - This study is focused on micro-scale measurement of metal (Ca, Cl, Fe, K, Mn, Cu, Pb, and Zn) distributions in Spartina alterniflora root system. The root samples were collected in the Yangtze River intertidal zone in July 2013. Synchrotron X-ray fluorescence (XRF), computed microtomography (CMT), and X-ray absorption near-edge structure (XANES) techniques, which provide micro-meter scale analytical resolution, were applied to this study. Although it was found that the metals of interest were distributed in both epidermis and vascular tissue with the varying concentrations, the results showed that Fe plaque was mainly distributed in the root epidermis. Other metals (e.g., Cu, Mn, Pb, and Zn) were correlated with Fe in the epidermis possibly due to scavenge by Fe plaque. Relatively high metal concentrations were observed in the root hair tip. This micro-scale investigation provides insights of understanding the metal uptake and spatial distribution as well as the function of Fe plaque governing metal transport in the root system.
AB - This study is focused on micro-scale measurement of metal (Ca, Cl, Fe, K, Mn, Cu, Pb, and Zn) distributions in Spartina alterniflora root system. The root samples were collected in the Yangtze River intertidal zone in July 2013. Synchrotron X-ray fluorescence (XRF), computed microtomography (CMT), and X-ray absorption near-edge structure (XANES) techniques, which provide micro-meter scale analytical resolution, were applied to this study. Although it was found that the metals of interest were distributed in both epidermis and vascular tissue with the varying concentrations, the results showed that Fe plaque was mainly distributed in the root epidermis. Other metals (e.g., Cu, Mn, Pb, and Zn) were correlated with Fe in the epidermis possibly due to scavenge by Fe plaque. Relatively high metal concentrations were observed in the root hair tip. This micro-scale investigation provides insights of understanding the metal uptake and spatial distribution as well as the function of Fe plaque governing metal transport in the root system.
KW - Rhizosphere root system
KW - Spartina alterniflora
KW - Synchrotron radiation technique
KW - Trace metals
KW - Transport
KW - Yangtze River estuary
UR - http://www.scopus.com/inward/record.url?scp=84949107304&partnerID=8YFLogxK
U2 - 10.1007/s11356-015-5068-4
DO - 10.1007/s11356-015-5068-4
M3 - Article
C2 - 26208662
AN - SCOPUS:84949107304
SN - 0944-1344
VL - 22
SP - 18933
EP - 18944
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 23
ER -