Fig. 2.

Local auxin distribution at the torpedo- and cotyledon-stage embryos of B. napus derived from the “mild” and prolonged heat treatment. a, b The torpedo-stage embryos. The DR5rev activity in the provasculature (vt), in the shoot apical meristem (SAM), and in the leaf primordia (lp). c–e The cotyledon-stage embryos with the DR5rev activity in the apex of cotyledons (c), in the shoot apical meristem (SAM), and in the root tip (rt). The light green color shows the expression of the reporter gfp gene driven by the DR5rev promoter. Bar = 20 μm