Normalized K-edge XANES spectra for freeze-dried leaves, stems, and roots of soybean, white lupin, narrow-leafed lupin, and sunflower grown for 16 d at 100 µm Mn. To allow comparison, the vertical lines correspond approximately to the white-line peaks of Mn(II; 6,552 eV) and Mn(III) and Mn(IV; 6,560 eV).