Abstract: The aim of this study was to change the shortcomings that the scape was too slender and prone to lodging， so as to meet the pot culture requirement and explore dwarfing mechanism of uniconazole on Curcuma alismatifolia cv. Chiang Mai Pink according to tissue anatomy. After being treated with different concentrations of uniconazole， the plant height and scape length decreased obviously， whereas diameters of both stem and scape increased a little. Moreover， 150 mg·L-1 uniconazole treatment could increase number of tillers obviously. By analyzing tissues structure of scape， the behavior that scape became short and thick was related to that the scape cells shortened in lengthways and largend in widthways. Based on microscopic observation of leaf epidermal cell， both upper and lower epidermal cell size decreased， and number of stomata increased in the treatment of uniconazole. Moreover， the upper epidermal stomata decreased， whereas lower epidermal stomata increased in the treatment of uniconazole.

Key words: Curcuma alismatifolia, uniconazole, dwarfing effect, tissue anatomy