Fig. 1
Application of exogenous GA3 to promote seed germination of P. notoginseng. A Appearance and stereoscopic micrographs of control and GA3-treated P. notoginseng seeds during the after-ripening process. B Changes in Em/En ratio of control and GA3-treated P. notoginseng seeds during the after-ripening process. C Appearance and morphology of control and GA3-treated P. notoginseng seeds after germination (t = 60d). D Changes in the rate of germination in control and GA3-treated P. notoginseng seeds during the after-ripening process. The values presented are the means ± SE (n = 3). Different letters indicate significant differences among treatments in the same period using Duncan’s test (P < 0.05)