Abstract
The relationship between the concentration of 2, 4-dichlorophenoxyacetic acid (2, 4-D) and the duration of treatment with 2, 4-D on direct somatic embryogenesis from carrot hypocotyl explants was examined. Elevated concentrations of 2, 4-D (up to 100 mg/liter) reduced the duration of pretreatment required for successful embryogenesis.