Phytomediated Biostimulation of the Autochthonous Bacterial Community for the Acceleration of the Depletion of Polycyclic Aromatic Hydrocarbons in Contaminated Sediments

Figure 2

Fractional copy numbers of GN (Gram negative) and GP (Gram positive) PAH-RHDα transcripts at the different time-points of analysis in N spiked sediments. Histogram values represent mean + SE of the 6 parallel samples. The same letters on the bars indicate values not significantly different at . BE: beginning of the experiment; notB: not biostimulated sediments (not N spiked nor vegetated) after 12 months of incubation; Ns6: N spiked sediments after 6 months of incubation; Ns9: N spiked sediments after 9 months of incubation; Ns12: N spiked sediments after 12 months of incubation.