Physiological Changes of Eleocharis Kuroguwai During Period of Growth Inhibition Caused by Bensulfuron-methyl

Bensulfuron-methyl처리(處理) 후 올방개 생육억제기간(生育抑制期間) 중의 생리적(生理的) 변화(變化)

  • Chun, J.C. (Department of Agricultural Chemical Jeonbug National University) ;
  • Shin, H.S. (Department of Agricultural Chemical Jeonbug National University)
  • Received : 1994.08.29
  • Published : 1994.09.30

Abstract

Physiological changes in Eleocharis kuroguwai Ohwi as affected by bensulfuron-methyl {Methyl 2-[[[[[(4, 6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino] sulfonyl]methyl]benzoate} was determined to relate the characteristics with regrowth behavior. There were no changes in relative growth rate(RGR) during the period of growth cessation after application of bensulfuron-methyl. RGR's of the growth ceseased plants caused at 39 and 51 g/ha began to increase in between 25 and 30 days after application (DAA) and between 30 and 35 DAA, respectively. In untreated plant tuber carbohydrate rapidly decreased right after emergence and almost consumed within 40 days. There was no carbohydrate consumption during the period of growth cessation in bensulfuron-methyl-applied plant, but the content started to rapidly decrease with regrowth. Tuber viability lasted for 30 days in untreated plant, while tubers were viable for 60 and 70 days after application of bensulfuron-methyl at 39 and 51 g/ha, respectively. During the period of growth cessation the plants kept minimum respiration and photosynthesis, but with regrowth respiration and photosynthesis were resumed and rapidly increased.

Bensulfuron-methyl 처리(處理) 후 올방개 생육(生育) 억제(抑制)로 부터 재생(再生)에 이르는 기간(期間) 중의 상대생장율(相對生長率), 괴경(塊莖) 탄수화물(炭水化物) 함량(含量)의 소장(消長), 각(各) 기관별(器官別) 호흡(呼吸), 광합성율(光合成率) 등을 조사(調査)하였다. Bensulfuron-methyl 처리(處理)이후 생장(生長) 억제(柳制) 기간(期間)에는 상대생장율(相對生長率)의 증가(增加)가 전혀 없다가, 39g/ha 처리(處理)에서는 처리(處理) 후 25-30일부터, 51g/ha 처리(處理)에서는 30-35일부터 증가(增加)되기 시작하였는데 이 시기가 재생(再生)의 시점(時點)이었다. 괴경(塊莖) 탄수화물(炭水化物)은 무처리(無處理)에서는 처리(處理) 직후 부터 급속히 감소되어 40일 후에는 거의 소진(消盡)되었던 반면에, bensulfuron-methyl이 처리(處理)된 경우에는 재생(再生) 직전까지 거의 변화(變化)가 없다가 재생(再生)과 함께 급격히 소모(消耗)되었다. 또한 괴경(塊莖)의 생존력(生存力)은 무처리(無處理)에서는 30일, 39g 및 5lg/ha 처리시(處理時)에는 각각 처리(處理) 후 60일 및 70일까지 지속(持續)되었다. Bensulfuron-methyl 처리(處理) 후 생육(生育) 억제(柳制)된 올방개는 이 기간(期間)중에도 최소한(最小限)의 호흡(乎吸)과 광합성(光合成)을 행하였으며, 재생(再生)과 함께 호흡(呼吸)과 광합성율(光合成率)이 크게 증가되기 시작하였다.

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