KNOTTED1 was the first homeobox gene to be described in plants. Homeobox genes are transcription regulators and required in animals to direct the cascade of genes that sets up pattern during development. Their role in plants is postulated to be as important – there are several KNOTTED-like genes ( KNOX genes) expressed in the meristem and during early leaf development. Mutant phenotypes suggest they maintain correct patterns of cell division and differentiation.
- plant science