Flowering Time and Physiological Reaction of Dendrobium nobile Lindl in Response to TDZ Application

The objective of this work was to analyze the effect Thidiazuron (TDZ) treatment on floral initiation, flowering time, ornamental characteristics and physiological metabolism potted Dendrobium nobile. Three TDZ concentrations (200, 500 1000 mg L−1) were applied as solution water root zone plants. Control plants (plants watered with water) showed a good vegetative development but no branches. greatly influenced process. For all tested concentrations, first flower bud occurred at 55–60 days after last irrigation (DAI), highest concentration showing major delay in its occurrence. initial (30% flowered plants) began 47 initiation statistical differences among treatments. Plants treated 500–1000 L−1 longest period (about 32 days) single flowers delayed withering about 2–3 compared lowest (200 L−1). number flowers, branches percentage distinctly by concentration. (40%) scored when performant providing best morphological features for value plant. Among factors affecting flowering, study that increased relative membrane permeability which facilitated transport macromolecular flower-forming substances into out membrane. Therefore, change could be an indicator shifts physiologically active during transition process nobile