Abstract: | Although GA3 doubled the numbers of cells in dwarf pea internodes,it caused no significant acceleration of cell division ratesin the apical meristem, estimated using cell doubling times,mitotic indices, or percentage labelled mitoses data. Increasedcell numbers in GA3-treated pea stems must be generated withinthe extending internodes. Key words: Cell division cycle, gibberellin, pea, Pisum, shoot apical meristem |