Feng Huan, Zhang Weiguo, Qian Yu, Liu Wenliang, Yu Lizhong, Yoo Shinjae, Wang Jun, Wang Jia Jun, Eng Christopher, Liu Chang Jun, Tappero Ryan
Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, USA.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, People's Republic of China.
J Synchrotron Radiat. 2016 Jul;23(Pt 4):937-46. doi: 10.1107/S1600577516008146. Epub 2016 Jun 15.
This study investigates the distributions of Br, Ca, Cl, Cr, Cu, K, Fe, Mn, Pb, Ti, V and Zn in Phragmites australis root system and the function of Fe nanoparticles in scavenging metals in the root epidermis using synchrotron X-ray microfluorescence, synchrotron transmission X-ray microscope measurement and synchrotron X-ray absorption near-edge structure techniques. The purpose of this study is to understand the mobility of metals in wetland plant root systems after their uptake from rhizosphere soils. Phragmites australis samples were collected in the Yangtze River intertidal zone in July 2013. The results indicate that Fe nanoparticles are present in the root epidermis and that other metals correlate significantly with Fe, suggesting that Fe nanoparticles play an important role in metal scavenging in the epidermis.
本研究利用同步辐射X射线微荧光、同步辐射透射X射线显微镜测量和同步辐射X射线吸收近边结构技术，研究了芦苇根系中溴、钙、氯、铬、铜、钾、铁、锰、铅、钛、钒和锌的分布情况，以及铁纳米颗粒在根表皮中清除金属的功能。本研究的目的是了解湿地植物根系从根际土壤中吸收金属后金属的迁移情况。2013年7月在长江潮间带采集了芦苇样本。结果表明，根表皮中存在铁纳米颗粒，其他金属与铁显著相关，这表明铁纳米颗粒在表皮中清除金属方面发挥着重要作用。
