Fig. 1

Percentage of germination under five pre-sowing methods. a Seed germination was evaluated for 100 days. Treatment #1 = seeds treated with sulphuric acid; treatment #2 = seeds treated with sulphuric acid and imbibed in aerated water for 48 h; treatment #3 = seeds treated with GA and soaked in aerated water for 48 h; and treatment #4 = seeds soaked in water for 48 h and then clipped. n = 10 in each treatment. b Three germinated seeds displaying hairy roots, cotyledons and the first leaves. Bar = 1 cm