Figure 1.

Allelopathic effects on Orobanche cumana radicle growth induced by extracts prepared from sequential extractions with n-hexane (A,B), dichloromethane (C,D), and ethyl acetate (E,F) of three types of Bellardia trixago organs: flowers, aerial green organs and roots of two Bellardia trixago populations—a white-flowered population (A,C,E) and yellow-flowered population (B,D,F). In each figure, bars with different letters are significantly different according to the Tukey test (p = 0.05). Error bars represent the standard error of the mean.