Floral Initiation

Activation is generally most marked in the central zone of the meristems. Most of the responses following inductive treatment have been recorded in different meristem components. For example in the peripheral zone in Sinapis alba, central corpus in Xanthium and sunflower, central tunica in tobacco, leaf primordia in some cases-are some of the zones where greater activity in terms of cell division and differentiation are noted in the shoot apex after exposure to inductive stimuli. Rise in RNA levels, increase in synthesis of new proteins, increase in general in translation, increase in ATP levels are some of the major molecular events that follow floral induction.