Compounds produced by photosynthetic plants were shown to support the
growth of PCB-degrading bacteria, and the organisms retained their abi
lity to metabolize PCBs. These results indicate that the rhizosphere z
one surrounding the roots of some plant species may selectively foster
the growth of PCB-degrading microbes. Thus, introduction of a careful
ly selected plant species at PCB-contaminated sites has promise as a n
ew means of enhancing and maintaining microbial degradation of PCBs.