Figure 4
From: Chromium (III) removal by perennial emerging macrophytes in floating treatment wetlands
Light micrographs of the transverse roots section of Phragmites australis for control, Cr500, Cr1000, and Cr2000 treatments; The scale bar is 150 μm (mark: S—stele, En—endodermis, Aer—aerenchyma, C—cortex, Ep—epidermis).
