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Compton-corrected µ-XRF images of Mn in a leaf of a sunflower plant grown for 16 d at 100 µm Mn. A, Overview of a whole leaf illustrating Mn accumulation associated with NGTs. B, Relative Mn concentration along the transect identified in A illustrating the variation in Mn accumulation. C, Detailed Mn distribution in a leaf section identified by the white box in A. D, Relative Mn concentration along the transect identified in C illustrating high Mn accumulation in NGTs.
