2-D X-ray Fluorescence Imaging of Cadmium Hyperaccumulating Plants by Using High-energy Synchrotron Radiation X-ray Microbeam

摘要

The monochromatic X-ray (37 keV) focused to microbeam (3 x3 mu m~2) with a Fresnel zone plate allows us for the first time to measure a cellular distribution of cadmium in the cadmium hyperaccumulating plant,Arabidopsis halleri ssp.gemmifera by detecting the CdK alpha line.The distribution of cadmium in the leaves was clearly observed by in vivo monitoring.It was found that cadmium had highly accumulated in certain parts of the trichomes.