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Fig. 7. RGL1, RGL2 and RGA repress flower opening, petal and stamen development in ga1-3 plants. (A) Comparison of the flowers of 30-day-old plants; genotypes as indicated. (B) Comparison of the seed set of various genotypes. (Left panel) Segment of main shoots bearing siliques. (Right panel) Seed production in a typical silique from genotypes as shown. Although ga1-3 plants lacking RGL1, GAI and RGA, or RGL2, GAI and RGA both have short siliques, the former bears no seeds whereas the latter is partially fertile. Siliques of ga1-3 plants lacking RGL1, RGL2 and RGA or lacking all four DELLA proteins are similar not only in length but seed production as well as in wild type. Scale bar: 1.0 mm.