Complementation of the atatm3 mutant by overexpression of AtATM3. A, AtATM3 transcript levels in wild-type, atatm3, and cATM3 transgenic plants as determined by RT-PCR. B, Growth of wild-type atatm3 mutant, AtATM3-complemented atatm3 plants (cATM3), and AtATM2-complemented atatm3 plants (cATM2) on 0.5× MS medium or 40 μm Cd(II)-containing 0.5× MS agar plates. C and D, Fresh weight and root length of wild-type and AtATM3 mutant plants shown in B.