The Mode of Action of Ethalfluralin on Growth Inhibition in Oat (Avena sativa L.)

Ethalfluralin이 귀리 (Avena sativa L.)의 생장억제(生長抑制)에 미치는 영향

  • Chung, N.Y. (College of Agriculture, Chonbuk National University) ;
  • Kwon, S.W. (College of Agriculture, Chonbuk National University) ;
  • Kim, J.C. (College of Agriculture, Chonbuk National University)
  • Published : 1991.03.30

Abstract

The effects of varying concentrations and durations of ethalfluralin (N-ethyl-N-(2-methyl-2-propenyl)-2, 6-dinitro-4-(trifluoromethyl) bezenmine) treated on oat(Avena sativa L.) cell division, cell enlargement, protein synthesis and histology were studied. After 6hr treatment, all concentrations(1${\times}$10^{-6}M to $1{\times}10^{-3}$) of ethalfluralin arrested completely metaphase in the cell division study. The oat coleoptile inhibition of straight-growth test were used to determine the influence of ethalfluralin on coleoptile growth. A range of all concentrations($1{\times}10^{-8}$M to $1{\times}10^{-3}$M) treatment did affect cell enlagement significantly. The $1{\times}10^{-6}$M to $1{\times}10^{-3}$ M concentrations reduced approximately over 50% cell enlargement. Protein incorporation study showed that all concentrations($1{\times}10^{-6}$M to $1{\times}10^{-3}$M) were not affected in protein synthesis. To investigate histological effects, the oats were treated for 24hr with $1{\times}10^{-7}$M. The longitudinal section cells, in the treated oat root tips were appeared to be enlarged and also showed lacking cytoplasm, multinucleate or abnormal cells compare with untreated roots.

식물생장 억제제인 ethalfluralin의 작용기구를 구명하기 위하여 제초제의 작용에 민감한 귀리(Avena sativa L.)를 택하여 조사한 세포분열(細胞分裂), 세포신장(細胞伸長) 및 단백질(蛋白質) 합성(合成) 그리고 조직(組織)의 변화에 미치는 영향을 요약(要約)하면 다음과 같다. 1. Ethalfluralin를 처리한 모든 처리구의 세포분열(細胞分裂) 억제(抑制)효과는 metaphase arrest로 인하여 후기(後期)와 말기(末期)의 세포분열(細胞分裂)이 나타나지 않았다. 2. 세포신장(細胞伸長) 억제(抑制)효과는 $1{\times}10^{-6}$M 이상의 농도에서 50%가 억제(抑制)되었으며 $1{\times}10^{-3}$M에서 87%의 억제(抑制)를 보여 ethalfluralin의 농도가 증가함에 따라 억제률이 증가했다. 3. 단백질합성(蛋白質合成) 억제(抑制)는 8시간 처리후 모든 농도 ($1{\times}10^{-6}$M to $1{\times}10^{-3}$)에서 단백질(蛋白質) 합성(合成)효과 영향을 미치지 않았다. 4. 조직(組織)의 변화는 24시간 처리후$1{\times}10^{-7}$M에서 근단 세포가 크게 보였으며 세포질(細胞質)이 없는 세포, 다핵(多核) 세포(細胞) 및 균일(均一)하지 않은 핵(核)이 관찰되었다.

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