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Zymograms of peroxidase (POX) isoforms. Total soluble proteins isolated from leaves (100 μg protein/lane) of watered plants (W), drought-stressed plants (D), watered plants treated with SA (WS) or drought-stressed plants treated with SA (DS) were separated by native PAGE and assayed for POX activity using guaiacol as a substrate. T0–T4 are different sampling points (see Figure 1). Densitometrically determined individual POX activities are represented by bars.
