Increasing Nutrient Solution pH Alleviated Aluminum-Induced Inhibition of Growth and Impairment of Photosynthetic Electron Transport Chain in Citrus sinensis Seedlings

Figure 4

Effects of pH and Al interactions on 21 Chl a fluorescence parameters in dark-adapted C. sinensis leaves. Bars represent means ± SE (n = 12). Different letters above the bars indicate a significant difference at P < 0.05. NS, and indicate nonsignificant and significant at 5% and 1% level, respectively.