Silicon (Si) is a biologically important element for plants in the order Poales (Yamamoto et al., 2011; Kido et al., 2015). In rice, Si is mainly deposited in the motor cells and the cell walls of the leaf epidermis. However, the molecular basis of this overall process has not been elucidated. Thus, we propose a protocol for the histochemical staining of the silica body based on specific hydrogen bonding between silanol group and the carboxylate group of crystal violet lactone (Ichimura et al., 2008), as described by Isa et al. (2010), but with minor modifications. This modified protocol can be used for observing Si accumulation during rice development.
