Fig. 1 in Review paper Stimulation of Plant Growth through Interactions of Bacteria and Protozoa: Testing the Auxiliary Microbial Loop Hypothesis

Fig. 1. Respiration of glucose-C (µg CO -C * g–1 soil) after addi2 tion of 1,000, 2,000, 4,000, and 8,000 ppm glucose to soil from the Heteren field site (Scheu 1992). 1,000 ppm glucose are completely respired by soil microorganisms within a single day, but glucose was not lasting longer than 4 days after saturation of the soil with glucose at 2,000–8,000 ppm (mean of 3 replicates ± 1 SD, see Ekelund et al. (2009) for a characterization of the soil).