Effect of Salicylic Acid on the Root Growth and the Eleutheroside Accumulation in the Adventitious Root Culture of Eleutherococcus senticosus

This study was carried out to investigate the dose-dependent effect of salicylic acid on both the adventitious root growth and the accumulation of various eleutherosides in the bioreactor culture of Eleutherococcus senticosus. The highest biomass production (5.4 g DW/L) was observed in the absence of salicylic acid, while the root growth was significantly decreased by increasing the concentration of salicylic acid. Salicylic acid stimulated the production of both eleutheroside B, E and $E_1$. The highest levels of eleutheroside B ($179.5{\mu}g/g$ DW), E ($1169.9{\mu}g/g$ DW) and $E_1$ ($45.4{\mu}g/g$ DW) were obtained by the addition of $80{\mu}M$ of salicylic acid. The maximum eleutheroside production was $4975.8{\mu}g/L$ when salicylic acid was not added. In addition, when the adventitious roots were cultured in the basal medium supplemented with $80{\mu}M$ of salicylic acid, the highest levels of eleutheroside B was observed at the 9th day, while eleutheroside E and $E_1$ were observed at the 6th day, respectively.

가시오갈피나무 불정근(不定根) 배양(培養)에서 불정근(不定根)의 생장(生長)과 Eleutheroside류(類)의 생산(生産)에 미치는 Salicylic Acid 처리(處理)의 영향

생물반응기를 이용한 가시오갈피 부정근 배양시에 salicylic acid를 농도별(0, 5, 10, 20, 40, 80 ${\mu}M$)로 처리하여 부정근의 생장과 eleutheroside류 생산과의 관계를 조사하였다. Salicylic acid 처리농도별 부정근의 생장은 무처리구에서 4.4 g dry weight(DW)/L로 가장 높았으며, salicylic acid 농도가 증가할수록 부정근 생장은 감소하였다. 그러나 eleutheroside B, E 및 $E_1$의 함량은 대체로 salicylic acid 농도가 높을수록 증가하여 $80{\mu}M$ 처리구에서 각각 179.5, 1169.9 및 $45.4{\mu}g/g$ DW로 생산량이 가장 많았다. 배지 1 L당 eleutheroside류의 총생산량은 무처리구에서 $4975.8{\mu}g/L$를 생산하여 가장 우수하였다. $80{\mu}M$의 salicylic acid 처리 후 15일간 eleutheroside류의 함량을 조사한 결과 eleutheroside B는 salicylic acid처리 후 9일째, eleutheroside E 및 $E_1$은 처리 후 6일째 각각 가장 많은 생산량을 보여 주었다.