Plant-derived smoke and aqueous extracts of smoke can overcome certain
types of seed dormancy. Successful smoke (aqueous) pre-treatment of s
eed of the fire-climax grass Themeda triandra Forssk. is reported. The
promotive effect of smoke on seed germination was retained when pre-t
reated seed was dried and stored for up to 21 days. Seed pre-treatment
with smoke had no detrimental effect on subsequent seedling growth.