Fig. 7. Auxin maxima in wild-type, pid-15 and laterne (pid-15 enp) embryos. (A-C,I) Wild-type embryos; (D-H) pinoid embryos; (K-M) laterne embryos. (A) Heart stage (arrowhead points to weak signal); (B,E-H,L,M) mid torpedo stage; (C) detail of B; (D) detail of E; (I) detail of B (reversed picture); (K) detail of L. Arrowheads indicate maxima. The arrow indicates the missing shoot maximum in F and a variable shoot maximum in L and M. co, cotyledon; rm, root meristem precursor. Scale bars: 20 µm.