supported by National Key Research and Development Program of China[2018YFD0900601];L.Chen,the open project fund from Laboratory for Marine Biology and Biotechnology,Qingdao National Laboratory for Marine Science(OF2019NO01);Doctor Fund of Shanghai Ocean University(A2-2006-21-200304);Science and Technology Development Fund of Shanghai Ocean University(A2-2006-20-200201)to W.Li.
Epiboly,the coordinated spreading of the enveloping layer(EVL),the yolk syncytial layer(YSL)and the deep cells(DCs)toward the vegetal pole,is required for gastrulation.Interference with the EVL leads to early developm...