||P.488 right column bottom paragraph: "Stomatal pores form between specialized pairs of epidermal cells, the guard cells (Fig. 1). Guard cells of dicotyledonous plants bow apart as they expand, thereby opening the stomatal pore (Table I). The anatomy of stomata in many monocotyledonous plants differs, but the principle of their movement is much the same (Chen et al., 2017). In opening the pore, guard cells accumulate solute, mainly K+ salts with Cl− and malate (Mal), as well as sugars. In closing the pore, guard cells reverse this process by metabolizing these solutes or releasing them to the apoplast."