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- W2040854057 abstract "일부 화학물질은 고농도에서 독성을 나타내지만 낮은 농도에서는 촉진되거나 유익하게 이용될 수 있는데 이와 같은 양방향 농도반응 현상을 양면성이라고 하며, 많은 제초제와 식물독소에서 볼 수 있다. 양면성 농도반응은 동물, 식물, 미생물을 포함하는 모든 생물체에서 일반적으로 볼 수 있다. 이 현상은 동물과 포유동물에서 가장 관심이 많았으나 식물에서는 관심이 적었다. 2,4-D, metribuzin, bromacil, bromoxynil, chloramben, propachlor, terbacil, EPTC, MSMA, glyphosate, metsulfuron, acifluorfen, terbuthylazine는 저농도에서 양면성 촉진반응을 나타냈다. Metsulfuron과 glyphosate는 아미노산 생합성에 양면성 반응을 나타냈고, terbacil과 simazine은 단백질 함량을 증가시켰다. 그리고 acifluorfen과 terbuthylazine의 양면성 반응은 직접 혹은 간접적으로 아미노산 생합성과 관련된 기작에 의하여 유도 혹은 증대되었다. Sulfentrazone과 lactofen을 처리하면 식물독소 생산을 증가시켜 균핵병 발생을 감소시켰다. 사탕수수에서 glyphosate 저농도 처리에 의한 설탕생산 증가효과는 설탕산업에서 상용화되어 활용되고 있다. 제초제의 생장촉진 반응을 나타내는 요인들에 대하여는 많이 밝혀졌으나 양면성의 작용기작에 관한 연구는 극히 제한되었고, 생장촉진을 화학적으로 유기하는 기작은 아직 완전히 밝혀지지 않았다. Hormesis is a dose-response phenomenon that is characterized by low-dose stimulation and high-dose inhibition. This biphasic dose-responses have had a long and extensive history in the fields of chemical toxicology, radiation biology and pharmacology. Hormesis has been found from bacteria, fungi, plants and animals, but hormesis in plants has received relatively little attention. Thus principles, occurrence, factors affecting the expression of hormetic responses, and their mechanisms in plants induced by herbicides are reviewed to provide the potentials for crop enhancement. Bromacil, bromoxynil, chloramben, propachlor, terbacil, EPTC, MSMA, and glyphosate at low doses showed stimulatory response in growth. Subtoxic dose of glyphosate increased sucrose content in sugarcane that is used worldwide in sugarcane production. Low dose of protoporphyrinogen-inhibiting herbicides induced increased pathogen defence, and low dose of triazine herbicides improved nitrogen metabolism and increased protein content in some crops. Further researches on potential benefits and risks of hormesis and its mechanism are needed for application of crop enhancement in agriculture." @default.
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- W2040854057 date "2012-09-30" @default.
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- W2040854057 title "Research Trends in Hormetic Stimulation Effects of Herbicides in Plants" @default.
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