• 식품산업과 영양
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• 제16권1호
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• pp.36-38
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• 2011

• BMB Reports
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• 제29권6호
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• pp.564-568
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• 1996

Bursts of ethylene production occurred in twice at an early exponential (EEP) and prestationary (PSP) phases, respectively, during growth of callus tissue isolated from the root of soybean seedlings. The second burst of ethylene production at PSP was smaller in magnitude than the earlier one at EEP, but was followed by increases in both guaiacol peroxidase (GuPOX) and ascorbate peroxidase (AsPOX). The increase in AsPOX activity was also preceded by an increase in lipoxygenase (LOX) activity. Treatment of the tissue with the ethylene antagonist 2,5-norbonadiene (NBD) resulted in substantial reduction in LOX and AsPOX activities during this period. GuPOX activity was reduced only slightly, if any, by NBD. Role of ethylene in the sequential induction of LOX and AsPOX in senescing callus tissue is discussed.

• 한국식품저장유통학회지
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• 제23권1호
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• pp.7-11
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• 2016

상온에서 기체로 존재하는 기존의 에틸렌 작용억제제인 1-MCP와 달리 상온에서 액상으로 존재하여 분무살포가 가능한 에틸렌 작용억제제를 개발할 목적으로 cyclopropene 유도체의 하나로서 2-decylcyclopropene-1-carboxylic acid ethyl ester(DCPE)를 합성하여 부유 단감을 대상으로 그 처리효과를 분석하였다. $4{\cdot}10^{-4}$ M의 DCPE를 수확 전에 분무살포 처리한 단감을 수확하여 45일간 저온저장한 후 상온($20^{\circ}C$)에 1주간 방치하면서 성숙 관련 지표의 변화를 조사한 결과, 에틸렌의 작용에 의해 유발되는 과육 연화의 진행이 효과적으로 지연되었으며, 그 억제 효과는 1 ppm의 1-MCP 처리와 대등한 수준이었다. 또한 DCPE는 적어도 한달간 성분 손실 없이 냉장 보관이 가능하였다. 따라서 DCPE는 단감 과실의 수확 후 과육의 연화를 지연시키는 약제로의 활용이 가능할 것으로 기대된다.

• Journal of Plant Biology
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• 제39권2호
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• pp.113-121
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• 1996

The role of Ca2+ on benzyladenine (BA)-induced senescence retardation in mature wheat (Triticum aestivum L.) primary leaves was investigated. When an extracellular calcium chelator, ethylene glycol-bis-($\beta$-aminoethylether)-N, N'-tetraacetic acid (EGTA) together with BA, was applied to senescing leaves for 4 days of dark incubation, the content of chlorophyll and soluble protein decreased rapidly. And, the content of malondialdehyde (MDA), known to be a degradation product of membrane lipids, increased compared with the BA alone control. The BA-EGTA combination also caused the stimulation of protease and RNase activity and a rapid loss of catalase activity owing to the decling of BA effects. In the case of treatment with only intracellular calcium antagonist 3, 4, 5-trimethoxybenzoic acid 8-(diethylamino) octyl ester (TMB-8) without the BA addition, the chlorophyll content at day 4 after dark incubation decreased in paralled with the increasing concentration of the antagonist. In addition, the chlorophyll content at 10-5 M calcium ionophore A23187 treatment in the absence of BA was similar to that of the BA alone treatment. These results suggest that calcium may mediate the retardation effect of BA on leaf senescence by acting as a second messenger and that the calcium input from cell organelles, as well as the calcium inflow from intercellular spaces and cell walls, may be involved in modulating cytosolic calcium levels related to BA action.