Fig. 3. Amount of microbial populations during the 60 days-experiment. Compar-
ison of the microbial populations in the control, HDMs and STL-Mssoils. Note:
Each datum represents the mean 7S.D. of three replicates. The statistical
Significance of microbial populations between treatment soils (HDMs and STL-
Ms) and control soils was represented. (*Po0.05, **Po0.01.) Note: HDMs,
hydrocarbon-degrading microorganisms. STL-Ms,HDMs coactive with plant STL.