Bioassay
Ten seeds of A. caudatus L. were placed on filter paper moistened with 0.8 mL of test solutions in a 3-cm Petri dish. Petri dishes were kept in the dark at 250C for 5 d, and then hypocotyl length was measured. The 5-mm coleoptile sections of 3-d-old etiolated oat (Av Avena sativa L. cv Victory) seedlings were incubated in 1% sucrose solution (pH 5.4) containing various concentrations of lepidimoide for 6 h at 250C in the dark. After incubation, the length of each section was measured.