Effect of hydrogen peroxide on the uptake of chlordane by Cucurbita pepo

Berger, William; Mattina, MaryJane Incorvia; White, Jason C.

doi:10.1007/s11104-012-1207-6

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…The physiological impacts of bulk, NP, and ionic Ag exposure on the two plant species, as well as the subsequent impacts on DDE accumulation processes, are unknown. Hydrophobic contaminants such as DDE may enter plant tissues by passive diffusion through the hydrophobic membranes or potentially by unique transport proteins. , However, with the exception of G. max shoots at select exposures, membrane integrity in the current study appeared to be largely unaffected by Ag.…”

Section: Resultscontrasting

confidence: 52%

“…Hydrophobic contaminants such as DDE may enter plant tissues by passive diffusion through the hydrophobic membranes or potentially by unique transport proteins. 35,36 However, with the exception of G. max shoots at select exposures, membrane integrity in the current study appeared to be largely unaffected by Ag. Berger et al 35 recently showed that aquaporins may play a role in the uptake of chlordane by C. pepo; in that study, plants exposed to hydrogen peroxide, which closes aquaporins, accumulated less chlordane and, upon removal of the peroxide from solution, contaminant levels again rose.…”

Section: ■ Experimental Sectioncontrasting

confidence: 50%

“…max shoots at select exposures, membrane integrity in the current study appeared to be largely unaffected by Ag. Berger et al recently showed that aquaporins may play a role in the uptake of chlordane by C. pepo; in that study, plants exposed to hydrogen peroxide, which closes aquaporins, accumulated less chlordane and, upon removal of the peroxide from solution, contaminant levels again rose.…”

Section: Resultsmentioning

confidence: 85%

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Impact of Ag Nanoparticle Exposure on p,p′-DDE Bioaccumulation by Cucurbita pepo (Zucchini) and Glycine max (Soybean)

Torre-Roche

Hawthorne

Musante

et al. 2013

Environ. Sci. Technol.

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The effect of nanoparticle (NP), bulk, or ionic Ag exposure on dichlorodiphenyldichloroethylene (p,p'-DDE; DDT metabolite) accumulation by Glycine max L. (soybean) and Cucurbita pepo L. (zucchini) was investigated. The plants were grown in 125-mL jars of vermiculite amended with 500 or 2000 mg/L of bulk or NP Ag; ion controls at 5 and 20 mg/L were established. During 19 d of growth, plants were amended with solution containing 100 ng/mL of p,p'-DDE. Total shoot p,p'-DDE levels in non-Ag exposed G. max and C. pepo were 500 and 970 ng, respectively; total root DDE content was 13,700 and 20,300 ng, respectively. Ag decreased the p,p'-DDE content of G. max tissues by up to 40%, with NP exposure resulting in less contaminant uptake than bulk Ag. Total Ag content of exposed G. max ranged from 50.5 to 373 μg; NP-exposed plants had 1.9-2.2 times greater overall Ag than corresponding bulk particle treatments and also significantly greater relative Ag transport to shoot tissues. Bulk and NP Ag at 500 mg/L suppressed DDE uptake by C. pepo by 21-29%, although Ag exposure at 2000 mg/L had no impact on contaminant uptake. Similar to G. max , C. pepo whole plant Ag content ranged from 50.5 to 182 μg, with tissue element content generally being greater for NP exposed plants. These findings show that the Ag may significantly alter the accumulation and translocation of cocontaminants in agricultural systems. Notably, the cocontaminant interactions vary both with Ag particle size (NP vs bulk) and plant species. Future investigations will be needed to clarify the mechanisms responsible for the cocontaminant interactions and assess the impact on overall exposure and risk.

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Section: Resultscontrasting

confidence: 52%

Section: ■ Experimental Sectioncontrasting

confidence: 50%

Section: Resultsmentioning

confidence: 85%

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Impact of Ag Nanoparticle Exposure on p,p′-DDE Bioaccumulation by Cucurbita pepo (Zucchini) and Glycine max (Soybean)

Torre-Roche

Hawthorne

Musante

et al. 2013

Environ. Sci. Technol.

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“…When the resulting F1 and F1 backcrossed hybrids were grown in DDE-contaminated soil under field conditions, the inheritance pattern of the POP uptake ability followed classical Mendelian genetics, thereby suggesting single-locus control. Berger et al 38 exposed chlordane-accumulating zucchini to the contaminant under hydroponic conditions to assess the possible role of aquaporins in contaminant uptake. Hydrogen peroxide deactivates aquaporins, and the effect is reversible.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Accumulation of Weathered p,p′-DDTs in Grafted Watermelon

İşleyen

Sevim

White³

2012

J. Agric. Food Chem.

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The grafting of melon plants onto cucurbit rootstocks is a common commercial practice in many parts of the world. However, certain cucurbits have been shown to accumulate large quantities of weathered persistent organic pollutants from the soil, and the potential contamination of grafted produce has not been thoroughly evaluated. Large pot and field experiments were conducted to assess the effect of grafting on accumulation of weathered DDX (the sum of p,p'-DDT, p,p'-DDD, and p,p'-DDE) from soils. Intact squash (Cucurbita maxima × moschata) and watermelon (Citrullus lanatus), their homografts, and compatible heterografts were grown in pots containing soil with weathered DDX at 1480-1760 ng/g soil or under field conditions in soil at 150-300 ng/g DDX. Movement of DDX through the soil-plant system was investigated by determining contaminant levels in the bulk soil and in the xylem sap, roots, stems, leaves, and fruit of the grafted and nongrafted plants. In all plants, the highest DDX concentrations were detected in the roots, followed by decreasing amounts in the stems, leaves, and fruit. Dry weight concentrations of DDX in the roots ranged from 7900 ng/g (intact watermelon) to 30100 ng/g (heterografted watermelon) in the pot study and from 650 ng/g (intact watermelon) to 2430 ng/g (homografted squash) in the field experiment. Grafting watermelon onto squash rootstock significantly increased contaminant uptake into the melon shoot system. In the pot and field studies, the highest stem DDX content was measured in heterografted watermelon at 1220 and 244 ng/g, respectively; these values are 140 and 19 times greater than contaminant concentrations in the intact watermelon, respectively. The xylem sap DDX concentrations of pot-grown plants were greatest in the heterografted watermelon (6.10 μg/L). The DDX contents of the leaves and fruit of watermelon heterografts were 3-12 and 0.53-8.25 ng/g, respectively, indicating that although the heterografted watermelon accumulated greater pollutant levels, the resulting contamination is not likely a food safety concern.

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“…The main processes involved in the plant-microbe combined remediation of organic soil contamination are plant absorption, plant degradation, and microbial mineralization [19]. The water channel enzyme in the plant roots mediates the transport of PCBs within the plant and consequently influences the ability of the plant to absorb PCBs [20]. Plants secrete the enzyme biphenyl dioxygenase, which is associated with the degradation of PCBs, and the ability of this biphenyl dioxygenase to degrade PCBs influences the effectiveness of plant-based remediation of PCB-contaminated soil [18].…”

Section: Introductionmentioning

confidence: 99%

Enhanced plant-microbe remediation of PCBs in soil using enzyme modification technique combined with molecular docking and molecular dynamics

Li¹,

He²,

Liu

2021

Biochemical Journal

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The study on the enhanced mechanisms of the enzymes involved in plant absorption, plant degradation, and microbial mineralization in the remediation of soils contaminated with polychlorinated biphenyls (PCBs) is of great significance for the application of plant-microbe combined remediation technique in PCB-contaminated soils. The present study first used a combination of molecular docking and molecular dynamics methods to calculate the effects of the plant absorption enzyme, plant degradation enzyme, and microbial mineralization enzyme on the PCBs in the soil environment. A multifunctional plant degradation enzyme was constructed with three functional roles of absorption, degradation, and mineralization using amino acid sequence recombination and site-directed mutagenesis to modify the template of plant degradation enzyme. Finally, using the Taguchi experimental design-assisted molecular dynamics simulation method, the suitable external environmental conditions of plant-microbe combined remediation of the PCB-contaminated soil were determined. In total, six multifunctional plant degradation enzymes were designed, which exhibited a significantly improved efficiency of PCB degradation. In comparison to the complex of plant absorption enzyme, plant degradation enzyme, and microorganism mineralization enzyme (6QIM-3GZX-1B85), the six multifunctional plant degradation enzymes exhibited significantly higher efficiency (2.10–2.38 times) in degrading the PCBs, with a maximum of 2.69 times under suitable external environmental conditions.

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Effect of hydrogen peroxide on the uptake of chlordane by Cucurbita pepo

Cited by 16 publications

References 32 publications

Impact of Ag Nanoparticle Exposure on p,p′-DDE Bioaccumulation by Cucurbita pepo (Zucchini) and Glycine max (Soybean)

Impact of Ag Nanoparticle Exposure on p,p′-DDE Bioaccumulation by Cucurbita pepo (Zucchini) and Glycine max (Soybean)

Accumulation of Weathered p,p′-DDTs in Grafted Watermelon

Enhanced plant-microbe remediation of PCBs in soil using enzyme modification technique combined with molecular docking and molecular dynamics

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