본 연구는 붉노랑상사화 인경에 함유된 살초활성물질을 분리하여 살초활성을 평가하고 그 화학구조를 구명하고자 수행되었다. Silica gel flash column chromatography, preparative TLC, HPLC 등 일련의 크로마토그래피법들을 통해 붉노랑상사화 인경의 MeOH 추출물을 분리·정제하였다. HPLC에 의해 최종 획득된 활성분획에 대한 GC/MS 분석 결과, galanthine(galanthan-1-ol)과 isoquinoline alkaloid인 montanine(O<SUP>2</SUP>-methyl pancracine)이 동정되었다. Montanine은 20㎍ mL<SUP>-1</SUP> 농도에서 돌피 유묘의 생장을 거의 100% 억 제시키는 것으로 나타났다. 한편, 붉노랑상사화 인경의 MeOH 추출물은 1,000㎍ mL<SUP>-1</SUP> 에서 대조구에 비해 화영벼 유묘의 신초와 유근의 생장을 각각 약 3.1% 및 8.3% 억제하였다.
This study was conducted to determine the herbicidal activity of herbicidal substances and identify them in bulbs of Lycoris flavescens. Methanol extract was purified by a series of chromatographic techniques including silica gel column chromatography, preparative TLC, and HPLC. The final HPLC gave two active fractions and two herbicidal substances were obtained. By GC/MS analysis, one was identified as galanthine (galanthan-1-ol) and the other was identified as montanine (O<SUP>2</SUP>-methyl pancracine), an isoquinoline alkaloid. Montanine showed nearly 100% of growth inhibition on the shoot and root of barnyardgrass (Echinochloa crusgalli) seedlings at 20 ㎍ mL<SUP>-1</SUP> as compared with the control. Meanwhile, methanol extract of L. flavescens bulbs showed only about 3.1% and 8.3% of growth inhibition on the shoot and root of rice cultivar, Hwayeongbyeo seedlings at 1,000 ㎍ m<SUP>-1</SUP> as compared with the control, respectively.