Uptake of trifluralin and lindane from water by ryegrass

Li, Hui; Sheng, Guangyao; Sheng, Wentao; Xu, Ouyong

doi:10.1016/s0045-6535(02)00093-0

Cited by 84 publications

(42 citation statements)

References 23 publications

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“…Food crops are susceptible to contamination by various pesticides and organic wastes when exposed to a polluted source, as these chemicals may be transported to varying extents into crop tissues (Harris and Sans, 1967;Walker, 1972;Li et al, 2002;Wild et al, 2006). The need for better understanding the mechanism and influential factors on plant uptake has prompted a series of studies on the plant-uptake process in recent times (Riederer, 1990;Paterson et al, 1994;Trapp, 1995;Trapp and Mathies, 1995;Burken and Schnoor, 1997;Weiss, 2000;Li et al, 2002Li et al, , 2005Wild et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…The need for better understanding the mechanism and influential factors on plant uptake has prompted a series of studies on the plant-uptake process in recent times (Riederer, 1990;Paterson et al, 1994;Trapp, 1995;Trapp and Mathies, 1995;Burken and Schnoor, 1997;Weiss, 2000;Li et al, 2002Li et al, , 2005Wild et al, 2005). Analyses of the concentrations of nonionic contaminants in plants in relation to the external levels in water (or soil solution) from extensive sources have revealed that these contaminants enter plants largely via a passive (i.e., partition) process (Briggs et al, 1982;Chiou et al, 2001;Trapp, 2004;Su and Zhu, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Interactions of mixed organic contaminants in uptake by rice seedlings

Zhu

Liang

2009

Chemosphere

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a b s t r a c tUptakes of o-chlorophenol (CP), 2,4-dichlorophenol (DCP), trichloroethylene (TCE), and atrazine (ATR), as single and mixed contaminants, by roots and shoots of rice seedlings (Oryza sativa L.) from hydroponic solutions were measured following a 48-h exposure of plant roots. As single contaminants, the concentrations of CP, DCP, and ATR in rice roots and shoots increased significantly with increasing concentrations in external solutions; however, TCE concentrations in rice roots and shoots decreased with increasing external TCE concentration or the exposure time. The observed bioconcentration factors (BCFs) of CP and DCP with roots and the BCF of ATR with shoots approximated the equilibrium values according to the partition-limited model. The BCF of DCP with shoots was about 30% of the partition limit, due to insufficient water transport into plants for DCP. In the ATR-CP-DCP mixed system, the BCFs of CP and DCP with both roots and shoots decreased significantly with increasing contaminant concentrations due to the enhanced mixed-contaminant phytotoxicity, as manifested by the greatly reduced plant transpiration rate. In the ATR-CP-DCP mixture system, the BCFs of ATR with roots at low concentrations were comparable with those for ATR alone, whereas the BCFs increased at high concentrations for an unknown reason. In the TCE-DCP system, TCE concentrations in roots increased with increasing TCE in external solutions, while TCE concentration in shoots stayed steady because of the strong TCE exchange at the air-leaf interface. The BCF of DCP with roots was comparable with that of DCP alone because there was no significant effect of added TCE on the plant transpiration rate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interactions of mixed organic contaminants in uptake by rice seedlings

Zhu

Liang

2009

Chemosphere

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“…There has been a considerable interest in understanding the uptake of organic contaminants by plants during the last two decades (Briggs et al, 1982;Trapp and Matthies, 1995;Weiss, 2000;Chiou et al, 2001;Li et al, 2002;Trapp, 2004). Plants could be exposed to contaminants in different ways.…”

Section: Introductionmentioning

confidence: 99%

Interaction between cadmium and atrazine during uptake by rice seedlings (Oryza sativa L.)

Zhu

Lin

et al. 2005

Chemosphere

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The uptake of atrazine by rice seedlings (Oryza sativa L.) through plant roots from nutrient solution was investigated in the presence and absence of Cd 2+ over an exposure period of four weeks. It was found that both atrazine and Cd 2+ were toxic to rice seedlings. Both shoot and root biomasses decreased when the seedlings were exposed to increasing atrazine or Cd 2+ concentrations in nutrient solutions. In the absence of Cd 2+ , a linear relationship was observed between atrazine concentrations in roots/shoots and in external solution, and more atrazine is concentrated in roots than in shoots. When atrazine and Cd 2+ concentrations in solution were maintained at mole ratio of 1:1, the accumulation of atrazine by seedlings was less and the seedling biomass was greater than found with other ratios, such as 1:2 or 2:1. Therefore, the formation of the complex between atrazine and Cd 2+ reduced the individual toxicities. Analyses of data with the quasi-equilibrium partition model indicated that the atrazine concentrations in rice seedlings and external water were close to equilibrium. In the presence of Cd 2+ , however, the measured bioconcentration factor (BCF) of atrazine with roots and shoots were considerably greater. The latter findings resulted presumably from the atrazine-Cd 2+ complex formation that led to a large apparent BCF.

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“…37 Although the reactors were closed and sterile, root-associated microbes such as rhizobia and rhizobacteria 38 could be inoculated in the solution as a result of plant cultivation. Compared with those of whole soybean systems, more 8:2 FTOH, 8:2 FTCA, 8:2 FTUCA, and 7:2 sFTOH, while less 7:3 FTCA, PFOA, PFHpA, and PFHxA were found in the solutions and plant roots of ethanol-washed soybean controls.…”

Section: Concentrations Of 8:2 Ftoh and Its Degradation Products In Smentioning

confidence: 99%

Uptake, Translocation, and Metabolism of 8:2 Fluorotelomer Alcohol in Soybean (Glycine max L. Merrill)

Zhang

Wen

et al. 2016

Environ. Sci. Technol.

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Biotransformation of fluorotelomer alcohols (FTOHs) is widely considered as an additional source of perfluorocarboxylic acids (PFCAs) in environmental biota. Compared with the extensive studies conducted in animals and microbes, biotransformation pathways of FTOHs in plants are still unclear. In this study, a hydroponic experiment was conducted to investigate the uptake, translocation and metabolism of 8:2 FTOH in soybean (Glycine max L. Merrill) over 144 h. 8:2 FTOH and its metabolites were found in all parts of soybean plants. At the end of the exposure, 7:3 FTCA [F(CF 2 ) 7 CH 2 CH 2 COOH] was the primary metabolite in roots and stems, while PFOA [F(CF 2 ) 7 COOH] was predominant in leaves. PFOA and 7:3 FTCA in the soybean-solution system accounted for 6.01 and 5.57 mol % of the initially applied 8:2 FTOH, respectively. Low levels of PFHpA [F(CF 2 ) 6 COOH] and PFHxA [F(CF 2 ) 5 COOH] in solutions and soybean roots resulted from microbial metabolism and plant root uptake. Glutathione-conjugated metabolites in soybean tissues were also identified. The activities of alcohol dehydrogenase, aldehyde dehydrogenase, and glutathione S-transferase in soybean roots increased during the exposure, suggesting their roles in 8:2 FTOH metabolism in soybean. This study provides important information for a better understanding of the uptake and metabolism of FTOHs and fluorotelomer-based compounds in plants.

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Uptake of trifluralin and lindane from water by ryegrass

Cited by 84 publications

References 23 publications

Interactions of mixed organic contaminants in uptake by rice seedlings

Interactions of mixed organic contaminants in uptake by rice seedlings

Interaction between cadmium and atrazine during uptake by rice seedlings (Oryza sativa L.)

Uptake, Translocation, and Metabolism of 8:2 Fluorotelomer Alcohol in Soybean (Glycine max L. Merrill)

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