ABSTRACT
The vascular evolution date since 450 million years ago. During the evolution occured several botanical events. The lignification for example is one of the last steps of vascular differentiation, that is a characteristic of plants evolution. The understanding about vascular development, physiological, biochemical and molecular approaches must be considered. Those approaches have been possible due plants as Arabidopsis, Coleus, Zinnia and Populus, which present easy visualization, good adaptability, as well as great laboratory condition of surviving. With the available of the molecular technology will be possible to advance in the knowledge of the mechanisms control to distinguish the type of vascular organization, as well as the gens expression during the differentiation.
Key Words:
lignin; vascular differentiation; xilogenesis