Figure 3.

Expression of MT1a and MT2a in germinating seedlings and developing siliques. Sections were probed with: A, B, and E to J, MT1a antisense; C, MT1a sense; D and K to O, MT2a antisense; P, MT2a sense. A to D, F, G, I, J, L, M, and O were treated with excess copper; E, H, K, and N are untreated plants. c, Cotyledons; h, hypocotyl; f, funiculus; p, placenta; ph, phloem; se, seed; v, vascular tissue; x, xylem. Arrows indicate the location of the transcripts. Blue or purple stain corresponds to hybridization signals. The seed coat stains brown because of its normal pigmentation.