In the present paper, the effects of
TDZ on the endogenous levels of zeatin (Z),
zeatin riboside ([9R]Z), isopentenyladenine (iP),
isopentenyladenosine ([9R]iP), and indoleacetic
acid (IAA) as well as some histological changes in
the apical meristem of D. Second Love shoots
during flower induction and initial development are reported.