Epidermal patterning genes are active during embryogenesis in XXXX .

@entity2085 @entity958 @entity35700 @entity48031 @entity2270
Epidermal cells in the root of @entity958 seedling differentiate either as hair or non-hair cells, while in the hypocotyl they become either stomatal or elongated cells. WEREWOLF (WER) and @entity35700 ( @entity35700 ) are positive regulators of non-hair and elongated cell development. @entity48031 ( @entity48031 ) is a positive regulator of hair cell development in the root. We show that WER, @entity35700 and @entity48031 are expressed and active during the stages of embryogenesis when the pattern of cells in the epidermis of the root-hypocotyl @entity2270 forms. @entity35700 is first expressed in the future epidermis in the heart stage embryo and its expression is progressively restricted to those cells that will acquire a non-hair identity in the transition between torpedo and mature stage. The expression of @entity35700 at the heart stage requires WER function. WER and @entity48031 are transiently expressed throughout the root epidermal layer in the torpedo stage embryo when the cell-specific pattern of @entity35700 expression is being established in the epidermis. We also show that WER positively regulates @entity48031 transcription and @entity35700 negatively regulates WER transcription in the mature embryo. We propose that the restriction of @entity35700 to the future non-hair cells in the root epidermis can be correlated with the activities of WER and @entity48031 during torpedo stage. In the @entity2085 we show that WER controls @entity35700 expression. We also provide evidence indicating that @entity48031 may also regulate @entity35700 expression in the hypocotyl.
