Abstract

Major groups of naturally occurring growth hormones, auxins, gibberellins and cytokinins have an important role in flowering. Morphological and physiological effects of the plant growth regulators were investigated during flower development of Dendrobium sp. Flowering process is initiated by the transition of the apical meristem from a vegetative pattern to a floral pattern. AIA (10mg/l) promotes the formation of vascular tissue (20mg/l) promotes the formation of flower buds and stem elongation. BA (10mg/l) delays the senescence of terminal flowers and stimulates the activity of inflorescence meristem.