Abstract: The effects of concentration of sucrose and hormone,photoperiod,temperature, the size of plantlets and the types of cultivars on the induction of in vitro corms and the effects of cultural bases on the survial ratio of the transplanted plants in vitro were studied with the plantlets cultured from taro ( Colocasia esculenta
Schott . ) shoot tips. The results are as follows: The suitable cultural medium for inducing in vitro corms is MS + sucrose 8 % +BA 1. 0 mg·L ^-1 + NAA 0. 5 mg·L^-1 ; The suitable cultural conditions is 12 h/ d light , 30 ℃; The bigger the size of the plantlets are , the easier the in vitro corms are to be induced ; The characters of taro in vitro corms induced are in accordance with the types of the cultivars; The survial ratio are affected by the cultural bases, among which the vermiculite is the best.

Key words: Taro ( Colocasia esculenta Schott.), Tube plantlets, Induction, Seedling culture