Molecular cloning and biochemical characterization of indole-3-acetic acid methyltransferase from poplar

The gene PtIAMT1 was cloned from poplar and found to encode indole-3-acetic acid methyltransferase (IAMT). The latter catalyzes formation of methyl indole-3-acetate (MeIAA) using indole-3-acetic acid (IAA) as substrate. Gene expression analysis suggests that PtIAMT1 is involved in development of multiple organs in poplar.