Video 3. Example movies of Tissue strain rate tensor (SRT), Cell Shape SRT and Intercalation SRT.

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DOI: 10.7554/eLife.35717.013

Local strain rates are extracted from segmented and tracked movies. Rates of tissue shape change (left), cell shape change (centre) and intercalation (right) are shown. Green vectors represent contraction and magenta vectors represent expansion. Time stamp indicates time before and after initiation of tissue bending at t = 0. See also Figure 2.