... for correspondence (e-mail: [email protected] ) 15 1 2002 © 2002. 2002 Xcl1 Leaf Maize Differentiation Cell position Lineage Multiple aleurone Protoderm Cell division orientation The development of plant form begins at the meristems, centers of undifferentiated cells...

... gastrulation heart mesoderm epiblast cell position cell movement The immediate outcome of gastrulation is the formation of the definitive germ layer and the organisation of a general body plan, which serves as a blueprint for fetal development. The establishment of the body plan is accomplished...