Micro-PIXE in Ecophysiology
نویسندگان
چکیده
Two selected examples of PIXE microanalysis in ecophysiology have been shown. Studies of heavy metal distribution in mycorrhizal and nonmycorrhizal roots of Plantago lanceolata showed different mechanisms in filtering of Zn/Pb and Fe/Mn, both enabling plants to cope with metals present in the environment. Studies of the mechanism used by the beetle Chrysolina pardalina to eliminate excessive amounts of Ni revealed that Malpighian tubules are responsible for the elimination of this metal from the hemolymph. In both examples GeoPIXE software was used for true elemental mapping using Dynamic Analysis method and analysis of spectra from selected micro-areas. Specimen thickness and matrix composition were obtained from proton backscattering spectra.
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