Development and transfer character of secretory glands in the broad bean (Vicia faba L.)

Abstract

The development and transfer character of the secretory glands developing ,on the stipules (from node I to X) in Vicia faba L. was investigated. It was found that the state of developmental and functional maturity is reached by them in nodes IV-VI from the shoot apex. In mature glands the characteristic ingrowths from the cell wall to the interior of the protoplast develop to different extents (number, size and shape) in the particular gland cells. Their most intensive development up to the formation of labyrinths was observed in the outher walls of the head, and particularly in the cells of its upper tier. In all the other cells of the gland (up to the subepidermal one) less developed ingrowths occur on the transverse walls and even less along the long axis of the gland. This arrangement of the ingrowths shows the direction of flow of secretive substances.