Complementation of the rhd3 mutant phenotype by the 12A RHD3 gene::cDNA construct. A through C, Four-day-old seedling roots. Bars = 300 μm. D through F, Rosettes of 4-week-old plants. Bar = 2 cm. A and D, Wild type (Columbia ecotype). B and E, Transgenic rhd3-2 harboring the 12A construct. C and F, rhd3-2 mutant.