Abstract
In wild-type Arabidopsis roots, epidermal cells which located in a cleft between two underlying cortical cells (designated H cells) differentiate into root hair cells and the other cells (designated N cells) into non-hair cells. CAPRICE (CPC), a positive regulator of differentiation into root hair cell, is transcribed and translated in N cells and then CPC protein moves to H cells. To elucidate the molecular mechanism that regulates intercellular movement of CPC protein, we isolated a mutant (FN20-4) in which intercellular movement of CPC:GFP fusion protein was suppressed. In FN20-4, root hairs were still formed from H cells, suggesting that the native CPC protein moves from N cells to H cells in this mutant. In FN20-4, genomic rearrangement has occurred and at least 11 genes are disrupted. Identification of gene that regulates intercellular movement of CPC:GFP fusion protein is in progress.
