Movie S4.

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Rapid cell shape changes do not induce microridge fusion and fission. 60-minute time-lapse video with 1-minute intervals of periderm cells expressing Lifeact-GFP on 72hpf zebrafish. Time-lapse begins immediately after laser ablation of periderm cells on either side of the cell of interest. The cell of interest rapidly elongates between the two wounds, but does not increase fusion and fission events. Orange circles show locations of microridge fusions. Blue circles show locations of microridge fissions. Microridge rearrangements occurred at a rate of 0.00393 events/μm·min over the course of the video. Scale bar: 10μm.