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Fig. 2. Effect of rhizosphere suspension (Rhiz) or cultured rhizosphere microbes (Cul) on total Se volatilized in 15 d. The 200-mL TSB cultivation solutions were supplemented with either 20 µM sodium selenate or sodium selenite. Each data point represents the mean value of three replicates. Mean values of total volatilized Se ± standard deviation are presented only in Day 15. The mean percentage of Se volatilized during 15 d of incubation is shown in the bar graph along with ± standard deviation. Different letters accompanying mean values of total Se volatilized (left side) and in the bar graph represent means with significant differences (Duncan multiple range test, p < 0.05).
