Figure 4.

Promoter GUS expression indicates AtFEX is expressed in young tissues, veins, and hydathodes. Promoter constructs in two different vectors (pKGWFS7, 8 lines and pGWB3, 7 lines) were analyzed with similar results. Pictures are from the pGWB3 lines. A, Widespread staining in seedling. B and C, Staining in older leaves reveals expression in hydathodes and veins. D, Flowers exhibit differential staining depending on the developmental stage. E, Magnification of flowers in (D) showing staining in pollen and sepals in more mature flowers. F, Silique from heterozygous parent with staining in funiculi. Scale bars are 1 mm.