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Your search keyword '"McKenna, Brigid A."' showing total 13 results
Start Over Author "McKenna, Brigid A." Publisher elsevier bv
13 results on '"McKenna, Brigid A."'

3. Investigating How H2s Can Alter the Interactions between Hg0 and Corroded Steel Surfaces to Guide Future Decommissioning Projects

Author

Paton, Lhiam, primary, Marczinczik, Nick, additional, Lindsay, Thomas, additional, De Vega, Raquel Gonzalez, additional, Skrzypek, Etienne, additional, Moro, Thebny Thaise, additional, McKenna, Brigid A., additional, Doolette, Casey, additional, Lombi, Enzo, additional, Clases, David, additional, and Feldmann, Jörg, additional

Published
2024
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9. Time-resolved X-ray fluorescence analysis of element distribution and concentration in living plants: An example using manganese toxicity in cowpea leaves

Author

Blamey, F. Pax C., primary, Paterson, David J., additional, Walsh, Adam, additional, Afshar, Nader, additional, McKenna, Brigid A., additional, Cheng, Miaomiao, additional, Tang, Caixian, additional, Horst, Walter J., additional, Menzies, Neal W., additional, and Kopittke, Peter M., additional

Published
2018
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10. Quantitative determination of metal and metalloid spatial distribution in hydrated and fresh roots of cowpea using synchrotron-based X-ray fluorescence microscopy

Author

Wang, Peng, primary, Menzies, Neal W., additional, Lombi, Enzo, additional, McKenna, Brigid A., additional, de Jonge, Martin D., additional, Donner, Erica, additional, Blamey, F. Pax C., additional, Ryan, Chris G., additional, Paterson, David J., additional, Howard, Daryl L., additional, James, Simon A., additional, and Kopittke, Peter M., additional

Published
2013
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13. Quantitative determination of metal and metalloid spatial distribution in hydrated and fresh roots of cowpea using synchrotron-based X-ray fluorescence microscopy

Author

Peng Wang, Neal W. Menzies, Simon James, Daryl L. Howard, F. Pax C. Blamey, Chris Ryan, Erica Donner, Martin D. de Jonge, Peter M. Kopittke, Brigid A. McKenna, Enzo Lombi, David J. Paterson, Wang, Peng, Menzies, Neal W, Lombi, Enzo, McKenna, Brigid A, de Jonge, Martin D, Donner, Erica, Blamey, F Pax C, Ryan, Chris G, Paterson, David J, Howard, Daryl L, James, Simon A, and Kopittke, Peter M

Subjects
0106 biological sciences, In situ, Environmental Engineering, Analytical chemistry, X-ray fluorescence, Spatial distribution, Plant Roots, 01 natural sciences, Arsenic, Metal, Vigna, Selenium, 03 medical and health sciences, Nickel, distribution, Environmental Chemistry, Waste Management and Disposal, Metalloids, 030304 developmental biology, Manganese, 0303 health sciences, biology, metal(loid)s, Chemistry, toxicity, Fabaceae, Mercury, hydrated root, x-ray fluorescence microscopy, biology.organism_classification, Pollution, Rhizodermis, Zinc, Microscopy, Fluorescence, Metals, uptake, visual_art, Stele, visual_art.visual_art_medium, Metalloid, Copper, Electron Probe Microanalysis, 010606 plant biology & botany, Nuclear chemistry
Abstract

Many metals and metalloids, jointly termed metal(loid)s, are toxic to plants even at low levels. This has limited the study of their uptake, distribution, and modes of action in plant roots grown at physiologically relevant concentrations. Synchrotron-based X-ray fluorescence microscopy was used to examine metal(loid)s in hydrated cowpea (Vigna unguiculata L.) roots exposed to Zn(II), Ni(II), Mn(II), Cu(II), Hg(II), Se(IV), Se(VI), As(III), or As(V). Development of a mathematical model enabled in situ quantitative determination of their distribution in root tissues. The binding strength of metals influenced the extent of their movement through the root cylinder, which influenced the toxic effects exerted-metals (e.g. Cu, Hg) that bind more strongly to hard ligands had high concentrations in the rhizodermis and caused this tissue to rupture, while other metals (e.g. Ni, Zn) moved further into the root cylinder and did not cause ruptures.When longitudinal distributionswere examined, the highest Se concentration in roots exposed to Se(VI) was in the more proximal root tissues, suggesting that Se(VI) is readily loaded into the stele. This contrasted with other metal(loid)s (e.g. Mn, As), which accumulated in the apex. These differences inmetal(loid) spatial distribution provide valuable quantitative data on metal(loid) physiology, including uptake, transport, and toxicity in plant roots. Refereed/Peer-reviewed

Published
2013
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