Abstract
A rapid and quantitative bioassay method for inhibitors of plant transformation by Agrobacterium tumefaciens with an intron-GUS binary vector was devised as an alternative method to the time-consuming potato tuber disk assay. Among several host plants tested, tobacco BY-2 suspension cells were the most preferable for this GUS expression assay. Furthermore, as the phytotoxicity of the test material, if any, is apparent from the growth inhibition of BY-2 suspension cells, this method can exclude phytotoxic com pounds.
