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Abstract
The fate of a genetically engineered microorganism, Pseudomonas putida AC30 (pMFB2) [AC30(pMFB2)], which is capable of degrading PCBs, and its effect on the densities of microbes were studied in seawater and seawater‐sediment microcosms contaminated with PCBs. In both microcosms AC30(pMFB2) had no apparent effect on the population densities of indigenous microbes such as virus, bacteria and phytoplankton. It was considered that this was caused by a rapid decrease of AC30(pMFB2). Obtained results confirmed that non‐indigenous genetically engineered microbes could not survive and had no significant effect on the population changes of indigenous microbes, as seen in other experiments.
