In this research, the acclimatized in vitro plants were transferred in aeroponic system and the effects of paclobutrazol (PBZ) and jasmonic acid (JA) on the production of potato (Solanum tuberosum L. cvs Agria and Svalan) minitubers and some plant characteristics in an aeroponic cultivation system under greenhouse conditions were investigated. Plants were foliar sprayed with paclobutrazol (50 and 100 mgl-1) and jasmonic acid (5 and 10 mgl-1) at 30 and 50 days after transplanting (DAT). Significant interactions between plant growth regulators and timing of treatment application were observed for plant height, number of minitubers, fresh and dry weights of minitubers. Also, the results of the analysis of combined experiments showed the significant interactions between cultivars, plant growth regulators and timing of treatment application for the number of minitubers, fresh and dry weights of minitubers. The number, fresh and dry weights of minitubers increased by using the concentration of 5 mgl-1 JA at 30 DAT in Cultivar Agria. Also, the use of 5 mgl-1 JA at 30 DAT in Savalan increased fresh and dry weights of minituber. The use of 100 mgl-1 PBZ reduced plant height and increased significantly the number, fresh and dry weights of minitubers per plant at 50 DAT in Cultivar Agria. In Cultivar Savalan, the concentrations of 5 mgl-1 JA and 50 mgl-1 PBZ increased significantly the number, fresh and dry weights of minitubers per plant at 50 DAT.
