CNGC20 expression in roots and shoots. GUS staining of plants carrying the CNGC20p:GUS construct was observed in roots of young seedlings (A), in petioles and tissue surrounding the veins of adult leaves (B), and carpels (C). On the cellular level, GUS staining was detected in the root cortex (D), mesophyll surrounding the veins (E), and in guard cells (F). (G) GFP fluorescence in epidermal cells after Agrobacterium-mediated transformation of Nicotiana benthamiana leaves with the CNGC20p:GFP construct. The bars represent 50 μm.