Co-uptake of atrazine and mercury by rice seedlings from water

Su, Yuhong; Zhu, Yan; Du, Xin

doi:10.1016/j.pestbp.2005.03.002

Cited by 14 publications

(9 citation statements)

References 26 publications

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“…It accumulates in living organisms causing harmful damage (Su et al 2005). At low concentrations of Hg, seedling growth of rice and cucumber was inhibited Cargnelutti et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Toxicity of Metal Elements on Germination and Seedling Growth of Widely Used Medicinal Plants Belonging to Hyacinthaceae

Street

Kulkarni

Stirk

et al. 2007

Bull Environ Contam Toxicol

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In South Africa, pollution of agricultural soils is on the increase primarily due to excessive application of fertilizers, sewage disposal and mining activities. This study was done to determine the effect of trace elements (Cu, Zn) and heavy metals (Cd, Pb, Hg) on germination and seedling development of Bowiea volubilis, Eucomis autumnalis and Merwilla natalensis. These medicinal plant species are highly recommended for cultivation in South Africa to reduce the pressure on wild populations. Copper and Zn at 1 mg L(-1) significantly (p < 0.05) reduced the percentage germination of E. autumnalis. Low concentrations (>or=1 mg L(-1)) of Cu and Zn negatively affected the roots of all three species. Mercury concentrations of 0.5 and 1 mg L(-1) significantly (p < 0.05) decreased the percentage germination of B. volubilis and E. autumnalis respectively. Cadmium and Hg at 2 mg L(-1) showed a detrimental effect on the root growth of B. volubilis. Concentrations of 0.5 mg L(-1) of all heavy metals tested significantly (p < 0.05) decreased shoot length of M. natalensis.

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“…It accumulates in living organisms causing harmful damage (Su et al 2005). At low concentrations of Hg, seedling growth of rice and cucumber was inhibited Cargnelutti et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Toxicity of Metal Elements on Germination and Seedling Growth of Widely Used Medicinal Plants Belonging to Hyacinthaceae

Street

Kulkarni

Stirk

et al. 2007

Bull Environ Contam Toxicol

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“…It inhibits aquaporins by substrate competition (Meharg and Jardine 2003). Results obtained by Su et al (2005) indicated that organic anion atrazine is taken up via water channel. Our finding that neither glycerol nor AgNO 3 inhibited PFOA uptake by maize roots significantly (Fig.…”

Section: Discussionmentioning

confidence: 99%

Mechanistic studies of perfluorooctane sulfonate, perfluorooctanoic acid uptake by maize (Zea mays L. cv. TY2)

et al. 2013

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Background and aims Perfluorinated compounds (PFCs) are of particular environmental concern. The migration of PFCs from soil to plants is a likely pathway for PFCs to enter the human food chain. This study aimed to investigate the uptake mechanisms of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) by maize (Zea mays L. cv. TY2).Methods Hydroponic greenhouse experiments were performed. Results The kinetics of PFOS and PFOA uptake fitted Mechaelis-Menten equation well, suggesting their carrier-mediated influx processes. Uptake of PFOS was insensitive to metabolic inhibitors (NaN 3 and Na 3 VO 4 ). In contrast, treated with NaN 3 and Na 3 VO 4 reduced the uptake of PFOA by 83 and 43 % respectively. PFOS uptake was decreased by 31 % and 25 % when plants were treated with aquaporin inhibitors, AgNO 3 and glycerol, respectively, while aquaporin inhibitors had no effect on PFOA uptake. Anion channel blockers, 4, 4′-diisothiocyanostibene-2,2′-disolfonate (DID) and 5-nitro 2-(3-phenylpropylamine) benzoic acid (NPPB) inhibited the uptake of PFOS by 33 % and 30 %, respectively. Anion channel blocker anthracene-9-carboxylic acid (9-AC) decreased the uptake of PFOA by 28 %. No competitive uptake was found between PFOS and PFOA. Conclusions Uptake of PFOS and PFOA by maize may have different mechanisms.

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“…The magnitude and efficiency of plant uptake depends in principle on contaminant level and properties, plant species/composition, exposure time, and other variables (Briggs et al, 1982;Chiou et al, 2001;Trapp, 2004;Wild et al, 2005). Previously, we have studied the uptake of atrazine by rice seedlings from nutrient solution with and without coexisting organic and metal-ion species (Su et al, 2005;Su and Zhu, 2006). It was found that the uptake of atrazine (ATR) by rice seedlings was largely unaffected by co-existing organic compounds and appeared to proceed essentially by passive (i.e., partition) mechanism.…”

Section: Introductionmentioning

confidence: 99%

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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Co-uptake of atrazine and mercury by rice seedlings from water

Cited by 14 publications

References 26 publications

Toxicity of Metal Elements on Germination and Seedling Growth of Widely Used Medicinal Plants Belonging to Hyacinthaceae

Toxicity of Metal Elements on Germination and Seedling Growth of Widely Used Medicinal Plants Belonging to Hyacinthaceae

Mechanistic studies of perfluorooctane sulfonate, perfluorooctanoic acid uptake by maize (Zea mays L. cv. TY2)

Interactions of mixed organic contaminants in uptake by rice seedlings

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