Movie S1.

Combined time-lapse (1-min interval) live cell image movie (15 mins in total) of inward F-actin movement visualized by proFWA::Lifeact:Venus in the Arabidopsis central cell of the mock, 10 μM wiskostatin application, scar2-1, 200 μM CK-666 application, arp2-1, scar4-1, scar2-1;scar4-1, dis2-1 and arpc4-t2 (related to figure 1 and supplementary figure 1). Scale bar = 20 μm.