Figure 6.

Histochemical localization of GUS activity in 3-month-old flowering transgenic Arabidopsis plants and the mature seed containing the ProDH promoter-GUS fusion gene. A, Flower stained overnight. B, Strong GUS staining in pollen grains and stigmas of flowers stained overnight. C, Silique showing strong GUS staining in the stigma, ovules, and abscission zone stained overnight. D, Longitudinal sections of the mature seed showing strong GUS staining, stained for 4 h. az, Abscission zone; co, cotyledon; ov, ovule; pg, pollen grain; rm, root meristem; sg, stigma; and sm, shoot meristem. Bars = 200 μm.