Objective: To study the effect of different concentrations of IAA

IBA

6-BA and GA3 on the germination and seedling growth of medicinal plant Polygala tenuiflora.Method: P. tenuifolia seeds were treated with four exogenous hormones with different concentrations. The germination potential

germination rate

germination index and vigor index were measured with distilled water as control. After germination

the plant height

root length

fresh weight and dry weight were measured.Result: Compared with distilled water control group

different concentrations of GA3 solution had an effect in promoting the germination and seedling growth of P. tenuifolia; 10

20

30 mg·L-1 IAA

20

30 mg·L-1 IBA and 20

30 mg·L-16-BA had different effects in promoting the germination of P. tenuifolia. Under the conditions of IAA

IBA

6-BA ≥ 40 mg·L-1 and IBA

6-BA ≤ 10 mg·L-1

the germination rate of P. tenuifolia seeds was inhibited to varying extent. IAA

IBA and 6-BA showed different degrees of inhibition on the seedling growth of P. tenuifolia after exogenous hormone treatment. By the overall effect

the order was GA3 > IAA > IBA > 6-BA. Among them

treatment with 150 mg·L-1 GA3 had the best effect

the germination rate and vigor index were respectively 1.17 times and 2.13 times that of the control group

and had obvious effects on the early growth of seedlings

such as seedling root elongation and fresh weight increase.Conclusion: By studying the effects of different exogenous hormones soaking seeds on the seed germination and seedling growth of P. tenuifolia

the exogenous hormones with the promoting effect are screened out

in order to provide certain theoretical basis and data reference for the cultivation and artificial cultivation of P. tenuifolia.