Research Article

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

Figure 6

Effects of pH and Al interactions on concentrations of (a, f, k) B, (b, g, l) Cu, (c, h, m) Fe, (d, i, n) Mn, and (e, j, o) Zn in C. sinensis (a-e) leaves, (f-j) stems, and (k-o) roots. Bars represent means ± SE (n = 8 except for 4 for Fe and Mn). 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.