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적심 및 분지(分枝) 유도를 위한 신규 생장조절제로서의 mevalocidin 활용
김진석(Jin-Seog Kim),연규환(Gyu Hwan Yon),김보관(Bo Gwan Kim),최정섭(Jung-Sup Choi),김은애(Eun Ae Kim),고영관(Young Kwan Ko),이일영(Ill Young Lee) 한국잡초학회·한국잔디학회 2020 Weed & Turfgrass Science Vol.9 No.1
현재 적심 및 분지조절제로서 여러 가지 약제가 개발되어 사용되고 있지만 화합물마다 약해, 효능 부족, 심한 잔류성, 좁은 사용범위, 기타 부작용 등의 단점이 있기 때문에 이를 보완할 수 있는 보다 안전하고 새로운 유형의 물질 탐색과 개발은 매우 필요한 상황이다. 본 연구에서는 미생물 유래의 천연물인 mevalocidin에 대해 적심제 및 분지생장조절제로서의 사용 가능성을 검토하였다. 토마토, 고추, 콩, 고구마, 들깨 유묘를 대상으로 여러 농도의 mevalocidin을 처리해 본 결과, 흡수된 mevalocidin은 정단부로 빠르게 이동하여 생장점을 고사시키는 특징을 보이며 상대적으로 체내 대사가 빠르게 진행되는 것 같았다. 작물에 따라 적정농도가 다르지만 전반적으로 2-4 kg ha<SUP>-1</SUP> 처리범위에서 양호한 적심효과가 나타났고, 1-3 kg ha<SUP>-1</SUP> 처리 범위에서는 정단 생장억제와 함께 분지가 유도되면서 유도된 분지의 양호한 생장이 진행되었다. 따라서 미생물 유래의 천연물인 mevalocidin은 원예작물, 식량작물, 일부 수목에 적심 및 분지(分枝) 유도를 위한 친환경적 신규 생장조절제로서 유용하게 활용될 수 있을 것으로 판단되었다. Modulating shoot architecture in many agricultural, horticultural, and ornamental industries, is important in increasing the yield and quality of their products. This study was conducted to investigate the possibility to use mevalocidin as a new plant growth regulator for thinning and lateral shoot induction. Mevalocidin which was discovered from static cultures of two fungal isolates by Dow Agrosciences, were sprayed with various rates at the seedlings of five crops (tomato, pepper, soybean, sweet potato, and perilla) and investigated several cultural traits such as shoot growth, lateral shoot induction and length. As a results, mevalocidin was seemed to rapidly move into shoot tip and selectively killed an apical meristem part or inhibit its growth at a proper dosage. Then the induced-lateral shoots were grown rapidly, showing that the chemical was easily metabolized in plant. Generally mevalocidin at 2-4 kg ha<SUP>-1</SUP> (500- 1,000 ppm) led effectively to kill the apical part although the proper rate was different to crop species. On the other hand, The lower rate of mevalocidin (1-3 kg ha<SUP>-1</SUP>, 250-750 ppm) were effective for height control and lateral branching through the break of apical dominance. Therefore, it seemed that mevalocidin, natural phytotoxin from microorganism metabolites, could be used as a new eco-friendly plant growth regulator for thinning and lateral shoot induction for agricultural, horticultural, and ornamental industries.
신규의 triazoyl quinoline 화합물 KSI-4315와 KSI-4317의 보리 흰가루병과 밀 붉은녹병에 대한 방제효과
최경자(Gyung Ja Choi),연규환(Gyu Hwan Yon),김홍태(Heung Tae Kim),장경수(Kyoung Soo Jang),김진철(Jin-Cheol Kim),이선우(Seon-Woo Lee),박창식(Chwang Siek Pak),조광연(Kwang Yun Cho) 한국농약과학회 2003 농약과학회지 Vol.7 No.4
Disease control activities of 230 triazolyl quinoline derivatives were investigated against six plant diseases such as rice blast, rice sheath blight, tomato gray mold, tomato late blight, wheat leaf rust (WLR) and barley powdery mildew (BPM). New triazolyl quinolines, KSI-4315 and KSI-4317 exhibited a great in vivo control activities against WLR and BPM, and then were selected for further tests such as preventive, curative, systemic, and persistence against WLR and BPM. The KSI-4315 and KSI-4317 contained MeS moiety and MsO moiety in carbon 4-position, respectively. They possessed both preventive activity and curative activity against WLR and BPM. KSI-4317 showed the better control activity than KSI-4315 against BPM, while KSI-4315 represented the better antifungal activity against WLR. Good persistence of KSI-4315 and KSI-4317 were also observed against WLR and BPM. Persistence of KSI-4315 was similar to that of KSI-4317 on WLR, but KSI-4317 was superior to KSI-4315 on BPM in its persistence. Systemic disease control of KSI-4315 and KSI-4317 was investigated by examining translaminar activity from leaf-under-surface to leaf-upper-surface, systemic activities by leaf to leaf movement and the effect of drenching treatment. Systemicities of KSI-4315 and KSI-4317 were not observed in wheat, but KSI-4317 showed more predominant systemicity than KSI-4315 in barley. These results suggest that KSI-4317 would potentially control WLR and BPM in the fields.