The expression pattern of PpGT47A in Physcomitrella , analyzed by histochemical staining of stable pGT47A:GUS lines. (A) Schematic drawing describing the GUS construct inserted into the Physcomitrella genome. (B) Adult gametophore shows GUS staining in the apical region and in the emerging gametophore on the side of the adult gametophore. (C) GUS staining of the antheridia. (D) GUS staining in tissue below the immature sporophyte. (E) Expression peak in young gametophore growing on the side of old gametophore. (F) Protonema side branches undergoing tip growth exhibit peaks in GUS expression. (G) Bud/juvenile gametophore exhibiting GUS staining.