Study of the spatial distribution of mercury in roots of vetiver grass (Chrysopogon zizanioides) by micro-pixe spectrometry.

作者: Cristina Lomonte , Yaodong Wang , Augustine Doronila , David Gregory , Alan J. M. Baker

DOI: 10.1080/15226514.2013.821453

关键词: ChrysopogonEnvironmental chemistryVascular bundleHydroponicsExodermisChemistryChrysopogon zizanioidesSuberinPhytotoxicityMercury (element)

摘要: Localization of Hg in root tissues vetiver grass (Chrysopogon zizanioides) was investigated by micro-Proton Induced X-ray Emission (PIXE) spectrometry to gain a better understanding uptake and its translocation the aerial plant parts. Tillers C. zizanioides were grown hydroponic culture for 3 weeks under controlled conditions then exposed 10 days with or without addition chelators (NH4)2S2O3 KI. These treatments used study effects these on localization allow during assisted-phytoextraction. Qualitative elemental micro-PIXE analysis revealed that mainly localized epidermis exodermis, containing suberin all treatments. at trace levels vascular bundle when plants treated mercury solution only. However, higher concentrations found also contained This findin...

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