X-ray Imaging of Zinc Uptake and Accumulation in Hyperaccumulator Thlaspi caerulescens
نویسنده
چکیده
The use of high energy x-ray fluorescence as a trace metal probe offers scientists an innovative tool for research. One application is the study of heavy metal accumulation in plant systems. The test species Thlaspi caerulescens has the ability to accumulate massive amounts of zinc, cadmium, and lead from contaminated soils as a form of bioremediation. In order to understand the efficiency of the plant, the distribution and relative concentration of zinc was determined for the hyperaccumulator Thlaspi caerulescens and a similar plant, Thlaspi arvense, a nonaccumulator. The leaves of the Thlaspi plants were scanned using x-ray microprobe fluorescence. An elemental distribution map of zinc concentration in the plant leaf was generated. Thlaspi caerulescens distributed zinc throughout the tissue of the plant leaf while Thlaspi arvense accumulated zinc in the veins of the plant with little translocation of zinc to surrounding tissues.
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