Fig. 3
From: The seasonal variations of allelopathic activity and allelopathic substances in Brachiaria brizantha
Concentration of (6R,9S)-3-oxo-α-ionol, (6R,9R)-3-oxo-α-ionol and 4-ketopinoresinol in B. brizantha shoots harvested in June, October and January. Mean ± SE from three independent experiments with three quantifications for each determination are shown. The different letters in the same groups indicate significant difference (P < 0.05) according to Duncan’s multiple comparison tests