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Sulfonylurea계 제초제가 처리된 다년생 잡초의 재생양상과 저장전분량의 변화
황인택(Hwang I.T.),이관휘(K.H. Lee),홍경식(K.S. Hong),김진석(J.S. Kim),이병회(B.H. Lee),조광연(K.Y. Cho) 한국농약과학회 2002 농약과학회지 Vol.6 No.1
Characteristics of regrowth and starch degradation in perennial weed rhizomes were investigated in a greenhouse. Cyperus serotinus started regrowth at 24 days after treatment of 1.25 g ai/㏊ of pyrazosulfuron-ethyl. The regrowth of Sagittaria trifolia, Eleocharis kuroguwai, and S. pygmaea required 30~39 days, and Potamogeton distinctus regrew at 55 days after treatment of 1.25 g ai/㏊ of pyrazosulfuron-ethyl. However, all of 5 perennial weeds hardly regrew until 45 days after treatment more than 5 g ai/㏊ of pyrazosulfuron-ethyl. Regrowth of C. serotinus 4-node rhizomes was 2 times higher than 2-node rhizomes, and 1~1.5 g of E. kuroguwai large tubers regrew faster than 0.3~0.5 g of small tubers treated with bensulfuron-methyl. Regrowth of C. serotinus was enhanced with delayed application of bensulfuron-methyl, however, 2-leaf stage of E. kuroguwai plants regrew better than 3 leaf stage of plants when treated with equal volume of bensulfuron-methyl. The critical periods of S. trifolia and E. kuroguwai growth depending upon the rhizome detachment were 12 and 18 days after sprouting, respectively. The starch stacked in the S. trifolia and E. kuroguwai tubers were exhausted at 18 and 27 days after sprouting, respectively. The highest level of sugar contents was showed at 9 days after sprouting in S. trifolia, and 18 days after sprouting in E. kuroguwai.
Acetolactate synthase에 대한 고효율 활성 측정방법 및 신규 저해제 탐색
박상희(S.H. Park),황인택(I.T. Hwang),이관휘(K.H. Lee),최정섭(J.S. Choi),변종영(J.Y. Pyon),조광연(K.Y. Cho) 한국농약과학회 2001 농약과학회지 Vol.5 No.3
This study was conducted to develop a high throughput system for screening acetolactate synthase (AlS) inhibitors, and to detect basic mother molecules for developing new novel herbicide candidates. The high throughput screening (HIS) method using 96-well plate and microplate reader was developed. This method is 8 times more effective than basic technique in one cycle per person. Futhermore, considering for less than 1/10 volume of materials required for ALS test and enzyme kinetics with 16 times faster speed compared to those of former procedure, this HIS method has more than 100 times higher efficacy than basic system in a consecutive procedure. We discovered 11 new ALS inhibitors such as 2-oxoglutaric acid, aminooxyacetic acid, azelaic acid, citric acid, cyanuric fluoride, itaconic acid, malonic acid, niclosamide, oxalic acid, glyoxylic acid, and suramin from 107 commercial plant-specific inhibitors using this technique. We hope these results might be useful to discover lead compounds for developing new novel herbicide candidate.