Low GA levels disrupt valve margin development and inhibit fruit opening. (A) SEM images showing the base of Arabidopsis fruit (stage 17b) of the wild type (WT), ind-1, ga4-1, and pIND >> GA2ox. Bar, 50 μm. (B) SEM images showing a close-up of valve margin and replum tissues. Pictures were taken in the middle of an Arabidopsis fruit (stage 17b) of the wild type, ind-1, ga4-1, and pIND >> GA2ox. Bar, 50 μm. (C) Shattering quantification of wild-type, ind-1, ga4-1, and pIND >> GA2ox fruits. Values represent the mean of three biological repeats (n = 3) (20 siliques each). Error bars represent standard deviation (SD).