Abstract: The experiment on tissue culture of A.mongolicus(Maxim.) Cheng F.was conducted with the stem section of sterile plant.On MS basic medium,the results in different phytohormone concentration and proportion showed that:(1)6-BA(1.0 mg/L) favoured the differentiation of sprout but did not favoured its lengthening growth;(2) KT(0.1 mg/L) combined with IBA(0.1 mg/L) is favorable not only for the differentiation but also for the lengthening growth of sprout;(3) GA(1.0 mg/L) could promote sprout to lengthen remarkbly.

Key words: Phytohormone, Ammopiptanthus mongolicus(Maxim.) Cheng F., Tissue culture, Sprout