Uptake of azoles by lamb's lettuce (Valerianella locusta L.) grown in hydroponic conditions

García-Valcárcel, Ana I.; Loureiro, Íñigo; Escorial, Concepción; Molero, Encarnación; Tadeo, José L.

doi:10.1016/j.ecoenv.2015.10.021

Cited by 24 publications

(28 citation statements)

References 44 publications

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“…These data indicated that wheat roots absorbed azoxystrobin continuously from the nutrient solution, and the system did not reach equilibrium until 96 h. The RCF gradually increased and reached a stable state (1.47 ± 0.11 L kg −1 ) after 96 h. A similar equilibrium between the nutrient solution and barley roots was reached after 24 h of cultivation for the dodemorph and tridemorph by Chamberlain et al 30 Garci ́a-Valcaŕcel et al also observed a stable RCF for lettuce roots for clotrimazole, fluconazole, and propiconazole after 9 days of cultivation. 31 The continuous absorption of azoxystrobin by wheat roots did not lead to a synchronous increase in the concentration of all parts of the wheat plant, which revealed that a fraction of the absorbed azoxystrobin was metabolized in the wheat body. Myung et al observed that 14 C-azoxystrobin could be demethylated in wheat cell culture, but the demethylated metabolite was difficult to accumulate because it could be rapidly degraded into water-soluble unknowns.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

Uptake, Translocation, and Subcellular Distribution of Azoxystrobin in Wheat Plant (Triticum aestivum L.)

Zhang

Yao

et al. 2019

J. Agric. Food Chem.

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The uptake mechanism, translocation, and subcellular distribution of azoxystrobin (5 mg kg–1) in wheat plants was investigated under laboratory conditions. The wheat–water system reached equilibrium after 96 h. Azoxystrobin concentrations in roots were much higher than those in stems and leaves under different exposure times. Azoxystrobin uptake by roots was highly linear at different exposure concentrations, while the bioconcentration factors and translocation factors were independent of the exposed concentration at the equilibrium state. Dead roots adsorbed a larger amount of azoxystrobin than fresh roots, which was measured at different concentrations. Azoxystrobin preferentially accumulated in organelles, and the highest distribution proportion was detected in the soluble cell fractions. This study elucidated that the passive transport and apoplastic pathway dominated the uptake of azoxystrobin by wheat roots. Azoxystrobin primarily accumulated in roots and could be acropetally translocated, but its translocation capacity from roots to stems was limited. Additionally, the uptake and distribution of azoxystrobin by wheat plants could be predicted well by a partition-limited model.

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Section: ■ Results and Discussionmentioning

confidence: 93%

Uptake, Translocation, and Subcellular Distribution of Azoxystrobin in Wheat Plant (Triticum aestivum L.)

Zhang

Yao

et al. 2019

J. Agric. Food Chem.

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“…The RCF (water) data of 37 chemicals with a number of plants/crops from 11 hydroponic studies (Briggs et al, 1982; De Carvalho et al, 2007; Gao et al, 2008; García-Valcárcel et al, 2016; Hinman and Klaine, 1992; Namiki et al, 2015; Romeh, 2014; San Miguel et al, 2013; Su and Zhu, 2006; Su et al, 2009; Xia and Ma, 2006) are listed in Table S1 (Supporting Information). Total data points are 48.…”

Section: Sources Of Literature Datamentioning

confidence: 99%

Improved prediction of the bioconcentration factors of organic contaminants from soils into plant/crop roots by related physicochemical parameters

Chiou

et al. 2019

Environment International

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There has been an on-going pursuit for relations between the levels of chemicals in plants/crops and the source levels in soil or water in order to address impacts of toxic substances on human health and ecological quality. In this research, we applied the quasi-equilibrium partition model to analyze the relations for nonionic organic contaminants between plant/crop roots and external soil/water media. The model relates the in-situ root concentration factors of chemicals from external water into plant/crop roots (RCF(water)) with the system physicochemical parameters and the chemical quasi-equilibrium states with plant/crop roots (αpt, ≤1). With known RCF(water) values, root lipid contents (flip), and octanol-water Kow’s, the chemical-plant αpt values and their ranges of variation at given flipKow could be calculated. Because of the inherent relation between αpt and flipKow, a highly distinct correlation emerges between log RCF(water) and log flipKow (R2 = 0.825; n = 368), with the supporting data drawn from 19 disparate soil-plant studies covering some 6 orders of magnitude in flipKow and 4 orders of magnitude in RCF(water). This correlation performs far better than any relationship previously developed for predicting the contamination levels of pesticides and toxic organic chemicals in plant/crop roots for assessing risks on food safety.

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“…, PCPs have been detected in the environment only at trace levels (ng/L, μg/L, or mg/L) but, as they bioaccumulate in plants and animals due to their high hydrophobicity (log K ow > 3.5), their real concentrations in organisms can be higher than in water or soils. The sorption of contaminants to plants depends principally on the polarity of each compound . In a hydroponic medium, where analytes transfer from an aqueous spiked solution to roots without interferences, hydrophobic compounds show greater sorption to roots than hydrophilic ones.…”

Section: Introductionmentioning

confidence: 99%

Simple method for the determination of personal care product ingredients in lettuce by ultrasound‐assisted extraction combined with solid‐phase microextraction followed by GC–MS

Cabrera-Peralta¹,

Peña-Álvarez²

2018

J of Separation Science

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A simple method for the simultaneous determination of personal care product ingredients: galaxolide, tonalide, oxybenzone, 4-methylbenzyliden camphor, padimate-o, 2-ethylhexyl methoxycinnamate, octocrylene, triclosan, and methyl triclosan in lettuce by ultrasound-assisted extraction combined with solid-phase microextraction followed by gas chromatography with mass spectrometry was developed. Lettuce was directly extracted by ultrasound-assisted extraction with methanol, this extract was combined with water, extracted by solid-phase microextraction in immersion mode, and analyzed by gas chromatography with mass spectrometry. Good linear relationships (25-250 ng/g, R > 0.9702) and low detection limits (1.0-25 ng/g) were obtained for analytes along with acceptable precision for almost all analytes (RSDs < 20%). The validated method was applied for the determination of personal care product ingredients in commercial lettuce and lettuces grown in soil and irrigated with the analytes, identifying the target analytes in leaves and roots of the latter. This procedure is a miniaturized and environmentally friendly proposal which can be a useful tool for quality analysis in lettuce.

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Uptake of azoles by lamb's lettuce (Valerianella locusta L.) grown in hydroponic conditions

Cited by 24 publications

References 44 publications

Uptake, Translocation, and Subcellular Distribution of Azoxystrobin in Wheat Plant (Triticum aestivum L.)

Uptake, Translocation, and Subcellular Distribution of Azoxystrobin in Wheat Plant (Triticum aestivum L.)

Improved prediction of the bioconcentration factors of organic contaminants from soils into plant/crop roots by related physicochemical parameters

Simple method for the determination of personal care product ingredients in lettuce by ultrasound‐assisted extraction combined with solid‐phase microextraction followed by GC–MS

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