Figure 1From: Root exudate profiling of maize seedlings inoculated with Herbaspirillum seropedicaeand humic acidsNumber of bacterial cells (log cells g −1fresh tissue) on roots of maize seedlings during different growth times. Treatments: control plants, log 109 cells mL−1 of Herbaspirillum seropedicae strain HRC 54, humic acids isolated from vermicompost (50 mg L−1), and bacteria plus humic acids. The values represent the mean ± standard deviation.Back to article page