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Transmission electron microscopy (TEM) images of control (untreated) chloroplasts (a) and 2 day (b), or 5 day (c), Cd-treated Salvia sclarea leaves. Chloroplasts appear electronically dense and upon Cd treatment (b,c), no noticeable disruption has been detected. cw: cell wall; mt: mitochondria; sg: starch grain; v: vacuole. Scale bar: 500 nm.
