This paper reports the cytohistological sudies on the morphogenisis in thin cell—layers cultures of raches of Brassica napus L.. Explants were obtained by excised thin cell—layers (four to nine layers of epidermal and subepidermal) from raches of Brassica napus L.. The explants cultured on MS mediums with addition different contet and ratio of NAA and 6—BA. Cell activation, cell division and cell differentiation were observed. The subepidermal cells may be activated, the epidermal cells may be activated too...