Germination of ga-1 seeds is completely dependent on the application of GAs, whereas wild-type seeds germinate in water (Groot and Karssen 1987). It was studied whether the germination characteristics of the seeds depended on the genotype of the embryo and endosperm or were influenced by the maternal tissues. GA-deficient and GA-producing seeds were raised in fruits of both genotypes by self-pollination of Ga-llGa-I, gallga-1 and Ga-llga-1 plants and by the cross ga-llga-1 x Ga-llGa-1 (Tab. 2). Ga-llga-I seeds always germinated in water, even
Tab. 1. Changes in protein content during development of ga-llga-1 and Ga-Ilga-I seeds in ga-llga-1 fruits. Protein content is expressed as equivalents of bovine gamma giobuttne standard (mean ± SD, n=3).