Abstract: Positional information is one of the important mechanisms underlying plant development because it is involved in pattern formation, cell differentiation and cell fate determination.Current studies indicate that positional information is related to certain kind of hormones, diffusible molecules or non-transcribed DNA and even molecule(s) localized in cell walls. Positional information may be a collaborative effect that involves these molecules and signaling.

Key words: Positional information, Cell fate, Signaling transduction, Plant development