Fig. 7From: Differences in the photosynthetic and physiological responses of Leymus chinensis to different levels of grazing intensityThe proline content, SOD, POD, and CAT activity of L. chinensis in the plots with different grazing intensities (control, no grazing; LG, light grazing; MG, medium grazing; HG, heavy grazing). Values are means ± SE (n = 3). Note that the y-axis scales differ greatly among the graphs. Values of a parameter labeled with different letters differ significantly among grazing intensities (ANOVA followed by LSD test, P < 0.05)Back to article page