Fig. 1From: Effect of root exudates of Eucalyptus urophylla and Acacia mearnsii on soil microbes under simulated warming climate conditionsThree type compounds of Acacia mearnsii root exudates. a The first category: more secretion under elevated CO2 condition, b The second category: more secretion under higher temperature condition, and c The third category: more secretion under ambient CO2 condition. The mean values and standard deviations of three replicates are presented. Significant differences of variable means among different treatments at each sampling date are indicated by different letters (P < 0.05). Legends refer to Table 1Back to article page