Abstract: The aim of this study was to investigate the effects of different concentrations of uniconazole on growth and plant type regulation of potted Prunus mume seedlings, and hence to cultivate more potted Prunus mume products with higher ornamental value. Six cultivars of potted Prunus mume seedlings were selected as the research objects, and three different concentrations of uniconazole were used for foliar spraying treatment, with water treatment as the control. The results were as follows, foliar spraying of 100~300 mg/L uniconazole decreased the growth of plant height and crown width of different cultivars of potted Prunus mume seedlings significantly, and the increase in the concentration of uniconazole could evidently enhance the inhibitory effect. Additionally, at the concentration of 300 mg/L of uniconazole, the growth of plant height and crown width of potted Prunus mume seedlings in six cultivars could be declined by 27.50%~80.05% and 39.45%~83.93%, respectively. Three different concentrations of uniconazole could improve the lateral bud germination in diverse potted Prunus mume seedlings, but inhibit the growth of basal diameter, branch stem thickness, branch length and internode length. Furthermore, the rise in the concentration of uniconazole could shorten the branch length and internode length. In summary, the study results suggest that from the perspective of the overall effect on regulating the plant type of potted Prunus mume seedlings, foliar spraying of 300 mg/L uniconazole was the optimal choice, which could make potted Prunus mume compact and full-crowned, with the best ornamental effect.

Key words: potted plant, Prunus mume, uniconazole, dwarfing, plant type regulation