Dormancy of scarified seeds of Stylosanthes humilis was broken by seleno-1-
methionine (SeM), a phenomenon inhibited by aminoethoxyvinylglycine and res
tored by 1-aminocyclopropane-1-carboxylic acid. Additive effects of SeM wit
h other promoting factors were not observed unless the latter also stimulat
ed germination to a relatively great extent. This germination enhancement o
ccurred regardless of any ethylene-like effect displayed by SeM.