Models of apical constriction. (A) Illustration of apical constriction resulting in tissue morphogenesis. (B) Three of the models of actomyosin architecture observed in apically constricting cells. Orange shading represents the regions of localized myosin-based force generation. (C) Maximum-intensity projections of 10 planes spanning 5 μm total Z-depth depicting C. elegans gastrulation from a ventral view with plasma membranes fluorescently labeled (mex-5p::mScarlet-I::PH). Ea and Ep are pseudocolored to visualize their internalization over time. L, R, A, and P indicate left, right, anterior, and posterior, respectively. Scale bar: 5 µm.
Figure 1.

Models of apical constriction. (A) Illustration of apical constriction resulting in tissue morphogenesis. (B) Three of the models of actomyosin architecture observed in apically constricting cells. Orange shading represents the regions of localized myosin-based force generation. (C) Maximum-intensity projections of 10 planes spanning 5 μm total Z-depth depicting C. elegans gastrulation from a ventral view with plasma membranes fluorescently labeled (mex-5p::mScarlet-I::PH). Ea and Ep are pseudocolored to visualize their internalization over time. L, R, A, and P indicate left, right, anterior, and posterior, respectively. Scale bar: 5 µm.

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