Fig. 3.

Homeotic changes in transgenic Gerbera. (A) Disk flowers of non-transgenic Gerbera show pappus hairs in whorl 1 (w1), fused petals (corolla) in whorl 2 (w2), and fused anthers in whorl 3 (w3). The disk flower whorl 4 (w4) organs, carpels, are covered by the fused anthers in nontransgenic flowers. (B) In transgenic Gerbera in which GRCD2 is partially down regulated, green leaf-like organs replace carpels in w4. (C) In transgenic Gerbera in which GAGA1 is partially down regulated (14), w4 organs are similarly replaced by green structures, and concomitantly, w3 organs by petal-like structures. (D) Transgenic Gerbera with strongly reduced GRCD2 expression shows petal-like organs in w4. (E) Nontransgenic ray flower showing normal fertile carpels in w4. (Scale bars indicate 1 mm.)