봉래꼬리풀의 종자 발아에 미치는 온도 조건과 화학적 처리의 영향

Effect of Temperature Conditions and Chemical Treatments on Seed Germination of Pseudolysimachion kiusianum var. diamantiacum (Nakai) T.Yamaz.

The germination characteristics of Pseudolysimachion kiusianum var. diamantiacum (Nakai) T.Yamaz., a rare and endemic plant designated by the Korea Forest Service, were investigated according to light conditions, temperature, and pretreatment. As a result of the germination experiment according to light conditions, it was determined that P. kiusianum is a photoblastic seed that does not germinate at all in dark conditions. The optimum germination temperature of the seeds was found to be 20-25℃, considering the final germination rate and germination time. Three growth regulators (IAA, GA3, kinetin) and two inorganic salts (KNO3, KCl) were pretreated to improve the germination rate of P. kiusianum seeds. The growth regulators IAA and kinetin had no significant effect on improving the germination rate of P. kiusianum seeds. On the other hand, GA3 significantly increased the final germination percentage and germination rate regardless of the concentration, especially the treatment of more than 500 ㎎·L-1 at 20℃ was more than 4 times more effective than the untreated. The inorganic salts KNO3 and KCl had no significant effect on the seeds of P. kiusianum at low concentrations, but at higher concentrations (40 mM and 300 mM, respectively), they improved the germination rate and germination age by 2 times compared to the untreated. The results of this study will be useful for the mass propagation of P. kiusianum, which has the potential to be utilized as a native plant for restoration.