• Nuclear Engineering and Technology
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• v.15 no.2
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• pp.110-116
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• 1983

The absorption and translocation of strontium-90 by soybean plant, Glycine max, was studied by applying strontium-90 solution on the foliage or on the soil surface right after the first flowering time under greenhouse conditions. The results are summarized as follows. In the foliar application of strontium-90, only a small portion of the radioactivity was translocated to other parts of the plant and most of it remained in the applied leaves, which should cause soil contamination after falling. In the soil surface application of strontium-90, much of the radioactivity was absorbed through the root and translocated to stems and leaves by different patterns depending on the growth stage.

• Korean Journal of Weed Science
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• v.15 no.4
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• pp.321-328
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• 1995

Absorption, translocation, and metabolism study of $^{14}C$-bensulfuron were conducted to determine selectivity and herbicidal action of bensulfuron in two rice cultivars and three paddy weeds at different temperatures. 1. Absorption of $^{14}C$-bensulfuron was greater at 30/$25^{\circ}C$ than at 25/$20^{\circ}C$ and also in cv. Sangpung than in cv. Samgang, and Cyperus serotinus and Sagittaria pygmaea showed greater amount of absorption than Echinochloa crus-galli. 2. Translocation rate of bensulfuron was higher at 30/$25^{\circ}C$ than at 25/$20^{\circ}C$ and also in cv. Sangpung than in cv. Samgang, and C. serotinus showed highest translocation rate followed by the S. pygmaea and E. crus-galli. 3. In metabolism study, concentration of parent compound in rice plants was greater in cv. Sangpung which was susceptible to bensulfuron than in cv. Samgang. More amount of parent compound was distributed in shoots and root of C. serotinus and S. pygmaea than E. crus-galli. 4. It may suggested that sensitivity to bensulfuron between rice cultivars may be due to different inactivation metabolic ability and phytotoxicity of rice increased at high temperature since higher amount of bensulfuron was absorbed. Higher herbicidal activity of bensulfuron may caused by higher absorption and translocation in three weed species at high temperature.

• Korean Journal of Weed Science
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• v.8 no.1
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• pp.45-52
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• 1988

A serial study on differential response in absorption and translocation of $^{14}C$-bensulfuron-methyl was conducted by use of a group of selected rice cultivars as the tolerant or the susceptible to bensulfuron-methly. Trial 1. Differential Response in Absorption and Translocation of Selected Cultivar Group. The susceptible cultivar group has reached as higher rate as 102%, 113%, 115%, 127% and 113% of the tolerant cultivar group in root absorption per seedling, per unit dry weight, and the rate of translocation from bottom to shoot, respectively. Trial 2. Differential Response in Absorption and Translocation of Selected Rice Cultivar as Affected by Exposed Time of Root Portion upto 48 hrs. ${\bullet}$ Regardless of leaf stage of experimented plants, the amount of absorption per seedling and per unit dry weight has reached rather higher in the susceptible(cv. IR 1846) than the tolerant (cv. Chinsurah Boro II). However, separating by portions, the tolerant was realized higher rate of aborption in root but the susceptible in shoot, respectively. ${\bullet}$ Translocation rate from root to shoot, namely the individual seedling based rate of radioactivity in shoot to total radioactivity, was significantly higher in the susceptile than the tolerant. ${\bullet}$ Depending on higher rate of seedling growth at the time of chemical treatment, the susceptible (cv. IR 1846) was seemed more sensitive even at equivalent rate of absorption and translocation.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.10 no.6 s.93
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• pp.25-31
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• 1989

제초제의 해독제란 제초제 약해로부터 작물을 선택적으로 보호하는 화합물을 의미한다. 현재 사용되고 있는 제초제 해독제는 작물에 흡수, 이행되는 제초제의 양을 줄여주거나 작물체내에서 제초제의 대사작용 속도를 촉진하여 무독성화 시킴으로써 작물의 약해를 경감시킨다.

• Korean Journal of Weed Science
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• v.13 no.2
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• pp.75-80
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• 1993

Root absorption, translocation and metabolism studies of $^{14}C$-bensulfuron in rice and Cyperus serotinus Rottb. were conducted to determine their selective mode of action. Rice absorbed a greater amount of bensulfron than Cyperus serotinus. The translocation rates of bensulfuron from roots into shoots were much faster in Cyperus serotinus than rice plants. The metabolic rate of bensulfuron was very fast in rice plants, but slow in Cyperus serotinus and therefore, the amount of parent bensulfuron remained in the shoots after 12 hours absorption was greater in Cyperus serotinus than rice. In conclusion, this studies indicated that Cyperus serotinus was susceptible to bensulfuron because of the slower metabolic rate and fast translocation rate, but tolerance of rice might be caused by faster metabolic rate in plants.

• Korean Journal of Weed Science
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• v.14 no.2
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• pp.107-111
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• 1994

Selective action of root-treated oxyfluorfen [(2-chloro-4-thrifluoromethylphenyl)-3'-ethoxy-4'-nitrophenyl ether] and chlomethoxynil [2, 4-dichlorophenyl-3'-methoxy-4'-nitrophenyl ether] were investigated. Oxyfluorfen showed greater activity to all plant species than chlomethoxynil. $^{14}C$-oxyfluorfen was little metabolized in roots of the plant species and more slowly absorbed than $^{14}C$-chlomethoxynil. These results suggest that herbicidal activity of oxyfluorfen at the site of action is higher than chlomethoxynil. In the tested plants, rice, barnyardgrass, sorghum, and corn were absorbed less of the oxyfluorfen and chlomethoxynil than the broad leaf plant species. However, no clear relationship was observed between a degree of tolerance and absorption and metabolism of both herbicides by the plant species.

• Nuclear Engineering and Technology
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• v.13 no.4
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• pp.221-228
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• 1981

${\gamma}$-(U-$^{14}$ C)-BHC was applied to rice plants grown in a pot and its fate in the growth, polishing and oil-extraction processes of the grain was investigated. The $^{14}$ C-activity was absorbed and translocated widely in the plant and the recovery of applied $^{14}$ C-activity in the straw and grain was about 2.8%, of which 9.4% was found in the brown rice. The % partitioning of $^{14}$ C-residues in bran and polished rice was 12:88 and that in oil and oilcake was 37 : 63. Characterization of $^{14}$ C-residues indicated the presence of ${\gamma}$-BHC, pentachlorocyclohexene, trichlorobenzene and hydrophilic metabolites, whose proportions were different in the straw and grain.

• The Korean Journal of Pesticide Science
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• v.8 no.4
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• pp.280-287
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• 2004

We investigated the residual amounts of endosulfan and procymidone taken by vegetables grown in hydroponics culture and field conditions treated with the pesticides in order to evaluate safe cultivation concentration of the pesticides in the vegetables. Endosulfan and procymidone were selected as test pesticides because they have been reported to frequently detect in agricultural products at different concentrations. In hydroponic culture, by Chinese cabbage, procymidone was absorbed 3.8 times higher than endosulfan. The higher the pesticide concentration get, the worse the plant grew. In soil treated with 10 mg/kg of endosulfan, the pesticide absorbed by Leafy radish, Chinese cabbage and radish was less then their MRLs. In case of carlot, the residue level in soil which did not exceed its MRL was 1 mg/kg. The concentrations of procymidone in soil which did not exceed the MRLs in Leafy radish, Chinese cabbage, radish and carrot were 10, 10, 2 and 1 mg/kg, respectively Usually aged endosulfan and procymidone residues were less absorbed into crops than the fresh ones. Chinese cabbage absorbed more endosulfan and pocymidone than leafy radish, radish doing more than carrot.

• Applied Biological Chemistry
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• v.39 no.4
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• pp.287-292
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• 1996

The present study was carried out to investigate the difference of absorption and translocation of Ni by radish grown for 45 days under factors such as the levels of Ni in soil, soil pH, competitive metal interactions, covering with soil, organic matter and lime. Germination rate of radish in soil treated by Ni 150 mg/kg was 40%. As soil pH was increased, the contents of Ni translocated to radish showed the negative correlation$(shoot=-0.965^{**},\;root= -0.837^{*})$. The Ni content in shoot and root of radish grown under 50 mg/kg Ni treated soil were slowly decreased with iron levels increased. However Ni content in shoot and root of radish grown under 50 mg/kg Ni treated soil showed increasing trend with the increasing the zinc levels. As covering with soil, organic matter and lime were treated, Ni contents of shoot and root in radishes were in the decreasing order of organic matter>covering with soil>lime.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.116-119
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• 1997

광산지 및 쓰레기매립지의 오염토양을 정화하는데 식물의 이용가능성을 평가하기 위하여 강원도, 경상북도 지역에 분포하는 17곳의 폐광산과 강원도에 분포하는 농촌형 일반 쓰레기매립지 6곳을 대상으로 광산지와 매립지의 토양 특성을 조사하고, 서식 식물종의 오염 물질 제거 능력과 개척종으로서의 가능성을 평가하였다. 광산지 토양의 경우 산성화가 진행된 곳이 많았고, 중금속함유량도 전국 토양의 평균함유량보다 훨씬 높게 나타났으나, 매립지의 경우 약알카리성 토양이 많았고, 광산지와 달리 중금속 오염의 우려는 없었다. 오염토양에 서식하는 쑥을 포함한 14종의 식물체중에서 오염토양정화기술에 이용 가능한 유용식물로 Aremisia princeps(쑥), Micanthus sinensis(억새), Oenanthera odorata(달맞이 꽃)등이 중금속의 흡수력과 지상부로의 이행력이 큰 식물종으로 나타나 phytoremediation에 있어서 개척종으로 이용가능할 것으로 판단되었다.