4. Conclusions
Bioaugmentation with the Arthrobacter sp. strain DAT1 could
achieve a quick and significant reduction of atrazine in soil amended
with 400 mg/kg.
Exposure to high concentration of atrazine
decreased the density of trzN, atzB and atzC genes in soil adapted to
low concentration, however, continuous increase in abundance of
the three functional genes was observed after inoculation of the
strain DAT1. TRFLP analysis also revealed the increase in relative
abundance of the strain DAT1. Therefore, bioaugmentation with the
strain DAT1could be a very effective bioremediation strategy for
heavy soil contamination