Fig. 6From: Embryological observations on seed abortion in Hibiscus syriacus L. and physiological studies on nutrients, enzyme activity and endogenous hormonesChanges in endogenous phytohormone contents during seed development in H. syriacus. Bars and error bars indicate the mean ± standard errors (n = 3). ABA, abscisic acid; CTK, cytokinin; GA, gibberellin; IAA, indoleacetic acid. I, proto-embryonic, 5–8 DAP; II, spherical embryo, 9–10 DAP; III, heart-shaped embryo, 11–12 DAP; IV, torpedo-shaped embryo, 13–17 DAP; V, cotyledon embryo, 18–20 DAP; VI, mature embryo I, 30 DAP; VII, mature embryo II, 40 DAP; VIII, mature embryo III, 50 DAP; IX, mature embryo IV, 60 DAP.Back to article page