Cell fate in the Arabidopsis root meristem determined by directional signalling.

摘要: Postembryonic development in plants is achieved by apical meristems. Surgical studies and clonal analysis have revealed indirectly that cells shoot meristems no predictable destiny position likely to play a role the acquisition of cell identity. In contrast animal systems, there has been direct evidence for inductive signalling until now. Here we present such using laser ablation root meristem Arabidopsis thaliana. Although these show rigid relationships, now demonstrate it positional control most important determination fate. Positional signals can be perpetuated from more mature initial guide pattern differentiation. This offers an alternative general opinion are source patterning information.