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Gibberellic Acid Promotes Seed Germination In Penstemon Digitalis Cv. Husker Red, Anderson Machado De Mello, Nereu Augusto Streck, Erin E. Blankenship, Ellen Paparozzi

Department of Agronomy and Horticulture: Faculty Publications

Penstemon seed often shows an inconsistent or a low germination percentage. Although most select cultivars are propagated by cuttings, for export to other countries, seed is preferred. Three experiments were conducted to determine if soaking seed in gibberellic acid (GA₃) would increase seed germination of Penstemon digitalis cv. Husker Red. GA₃ concentrations used were 0, 10, 50, 100, 200, and 500 mg∙L^–1 (first experiment); 0, 500, 1000, and 1500 mg∙L^–1 (second experiment); and 0, 500, and 1000 mg∙L^–1 (third experiment). The first and second experiments were conducted in a growth chamber, whereas the third …