Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Herbicidal Characteristics of Dhelwangin Isolated from Agastache rugosa

방아풀로부터 분리한 Dhelwangin의 살초 작용 특성

An, Xue-Hua;Li, Li-Zhong;Cho, Kwang-Min;Kim, Sung-Eun;Chun, Jae-Chul
안설화;이입충;조광민;김성은;전채철

  • Published : 2008.12.30
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Abstract

A series of experiments were conducted to elucidate herbicidal action characterisitics of dhelwangin [4-hydroxy-6-methyl-3-(4-methyl-1-oxo-pentyl)-2H-pyran-2-one] isolated from Agastache rugosa. Dhelwangin did not affect seed germination. Reduction of chlorophyll content in maize and soybean as affected by 10mM dhelwangin was about 84% and 75%, respectively, which were very close to the level obtained with 0.1mM paraquat. The herbicidal activity of dhelwangin increased under light condition, but mode of action of dhelwangin was not likely to be associated with photosynthesis. Electrolyte leakage from soybean leaf disks incubated in dhelwangin solution was much greater than one from maize leaf disks. Elongation of oat coleoptile was completely inhibited at higher than 0.5mM dhelwangin. The results suggested that mode of action of dhelwangin was possibly related in part with destruction of cell membrane, resulting in inhibition of cell elongation.

방아풀(Agastache rugosa) 중 dhelwangin의 살초작용 특성과 작용 기구를 밝히고자 일련의 실험을 수행하였다. 살초 활성물질 dhelwangin은 종자의 발아에 영향을 끼치지 않았다. 콩과 옥수수에 대한 10mM dhelwangin 처리 결과에 따른 엽록소 함량 감소는 0.1mM paraquat 처리 결과와 비슷한 수준을 나타내었으며, 콩에서 약 84%, 옥수수에서 약 75%가 소실되었다. 광 존재 하에서는 dhelwangin의 약효 발현효과가 증대되는 경향을 나타내었으나, dhelwangin의 살초 작용 기구가 광합성과 관련되어 있지는 않는것으로 나타났다. Dhelwangin 처리에 따른 콩 엽절편에서의 전해질 유출 정도는 옥수수에 비하여 매우 높아 큰 살초 반응성 차이를 보였다. 또한 귀리 엽초에 대한 dhewangin 처리 결과는 0.5mM dhelwangin 처리 수준 이상에서는 완전한 세포 신장 억제 효과를 나타내었다. 이상의 결과는 dhelwangin의 살초 기구가 일정 부분 세포막 파괴로 세포 신장이 억제되는것임을 시사해 주었다.

Keywords

References

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