Fig. 2
From: Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
Mean germination (± SE) of Ipomoea murucoides (a-e) and I. pauciflora seeds (f-j) in response to the addition of liquid extracts of I. murucoides and I. pauciflora and to sowing at three different densities. Different lowercase letters indicate differences statistically significant among type of aqueous extracts at P < 0.05 (Tukey test)