“…Flavonols inhibit auxin transport, as shown by genetic analyses of mutants that do not synthesize them or by exogenous treatment of wild-type plants with flavonols Peer et al, 2001Peer et al, , 2004Peer and Murphy, 2014). Moreover, flavonols can act as in vivo reactive oxygen species (ROS) scavengers in Arabidopsis thaliana and in tomato (Solanum lycopersicum) plants (Maloney et al, 2014;Watkins et al, 2014) and interfere with indole-3-acetic acid (IAA) catabolism (Peer et al, 2004(Peer et al, , 2013. Previous studies have shown that in vitro-grown roots, which are routinely exposed to illumination, accumulate high levels of flavonols (Buer and Muday, 2004).…”