The complementary power of combining multiple X-ray techniques to understand the unusual properties of hyperaccumulator plants has been highlighted in a new cover article just published in New Phytologist.
X-ray fluorescence microscopy (XFM) at the Australian Synchrotron has been used by a consortium of international researchers led by Dr Antony van der Ent of the Centre for Mined Land Rehabilitation at The University of Queensland, in association with A/Prof Peter Kopittke of the School of Agriculture and Food Science also at The University of Queensland.
The XFM technique generates elemental maps showing where elements of interest are found within plant tissue, seedlings or individual cells.
Visually striking images (obtained at the XFM beamline) show various hyperaccumulator plants, on the cover of the April issue of New Phytologist. In the images each element is depicted in a different colour, making up a red-green-blue (RGB) image.
“Hyperaccumulator plants have the unusual ability to accumulate extreme concentrations of metals and metalloids in their living tissues,” said van der Ent.
“Hyperaccumulators are of scientific interest because whilst metals are normally toxic to plants even at low concentrations, these plants are able to accumulate large concentrations without any toxic effects,” he added
Image: X‐ray Fluorescence (XRF) elemental maps of hyperaccumulator plants. The tricolour composite images show (left to right) root cross‐section of Senecio coronatus (red, iron; green, nickel; blue, potassium); and seedlings of Alyssum murale (red, calcium; green, nickel; blue, Compton scatter).
Credit: A. van der Ent.