Phenotypic, molecular, and biochemical analyses of T-DNA insertion lines bdx-1 and bdx-2 . A) Schematic representation of T-DNA insertion at end of second exon of BDX for bdx-1 and at end of third exon for bdx-2. B) Phenotypic comparison between heterozygous bdx-1 plant and wt. All siliques from heterozygous bdx-1 plants were shorter than those from wt. C) Many seeds from bdx-1 plants were small and wrinkled (right). Similar phenotype was observed for T-DNA bdx-2 siliques and seeds (Additional file 1: Figure S6). D) Quantitative analysis of silique length in wt, bdx-1, and bdx-2. E) BDX endogenous gene expression was significantly decreased in inflorescences of heterozygous bdx-1and bdx-2, compared with that in wt inflorescences. Different letters indicate significant differences.