Effect of Photoperiod, Seed Vernalization and Growth Regulators on Growth, Development and Endogenous Hormones in Carrot Var. Nantes

The investigations reveal that the carrot var. Nantes responds to photoperiod. LD enhanced morphological characters and promoted flowering. Vernalization of seeds was ineffective in altering the growth and development of carrot plants. GA₃, at 100 mg/1 as seed soaking treatment did not influence either growth parameters or flowering. The growth promoters, cytokinins were higher in plant exposed to LD. 7VDHZ was predominant cytokinin observed under long photoperiod in carrot. The growth inhibitor, ABA was markedly higher under SD in plants raised from both unvernalized and vernalized seed. The growth and development of carrot plant is discussed in relation to the environmental variables and endogenous hormones.