Fig. 1.

Germination index for sorghum lines ‘IS9530’ and ‘RedlandB2’. Caryopses were harvested on different days after pollination (DAP), and incubated for 12 d in water at 25 °C (circles). Embryos (axis plus scutellum; Fig. S4 in Supplementary data, available online) were dissected and incubated at 25 °C in distilled water (squares) or 50 µm ABA (triangles). Each data point is the mean value of two biological replicates (i.e. two field plots) assessed in triplicate. Bars indicate standard error with n = 2. Time of physiological maturity is indicated with an arrow.