In the case of absorption trials of pollutant from liquid media, there are two major results. Transformed roots of Calystegia sepium show an anthracene concentration of 50 to 60 times that of their growth medium. Second, no phytotoxicity of anthracene was detectable at all concentration levels tested. In the case of absorption and metabolization of anthracene from gelled media, trials show no phytotoxic effects due to anthracene. These high values are discussed in comparison with trials on whole plants.
Evidence is given for a very low but detectable metabolization level.