Fig. 4.

Germination (mean ± s.e.) of (A,B) Actinotus leucocephalus and (C,D) Tersonia cyathiflora seeds under an alternating light/dark regime (12 h light/12 h dark, open bars) or continuous darkness (filled bars) for 35 days. Seeds were incubated in water (A,C) or smoke water (B,D) at 20 °C. Prior to testing, seeds had been stored in the laboratory (15 °C) or buried in nylon mesh bags in unburnt soil for 24 months. Asterisks (*) indicate significant differences in germination between light regimes for each treatment.