Fig. S4.

Time course of suspensor development. At 28 h after pollination, 85.93% (n = 64) of proembryos were at two-celled stage. In 48 h after pollination, 88.46% (n = 78) of embryos were at the eight-celled stage with a four- or six-celled suspensor. At 56 h after pollination, 77.91% (n = 86) of embryos were at the 16-celled stage with a 6- or 8-celled suspensor. At 72 h after pollination, 85.57% (n = 97) of embryos were at the 32-celled stage and the suspensors still consisted of 6–8 cells. At 96 h after pollination, 93.15% (n = 73) of embryos were at the heart stage, and the number of suspensor cells remains 6–8.