Line Plot from Scientific Research

Mean cell shape index {p}_{0}=P/sqrt{A} as a function of time in the trunk segmental ectoderm, where P is the cell perimeter and A is the cell area. The shaded region shows the standard deviation. Data are aggregated from four embryos. The dotted lines indicate the measured values from nuclear movies, whereas the markers indicate values measured from the snapshots of membrane marker movies ( Methods ). The error bars on the snapshot markers denote standard deviations. The shape index remains close to 4 (the shape index of a perfect square) for the entirety of ectodermal grid formation. The green-shaded region demarcates the convergent extension phase of growth.

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