Research Article

Evaluation of Copper Oxide Nanoparticles Toxicity Using Chlorophyll Fluorescence Imaging in Lemna gibba

Figure 6

The change of the nonphotochemical quenching of fluorescence ( ) in L. gibba whole plants by being exposed to different concentrations of CuO NPs, determined by Chl a fluorescence imaging PAM method. CuO NPs’ concentrations are indicated on the left side of the figure and exposition time on top of the figure. The change of leaf area and leaf Chl distribution is indicated on the figure by the change of the size and shape of the fluorescence emission. The change of color on the leaf area in the figure indicates the change of the value on this specific leaf area. Color scale on the bottom of the figure indicates the color associated with the relative value of .
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