Field study on the uptake, accumulation and risk assessment of perchlorate in a soil-chard/spinach system: Impact of agronomic practices and fertilization

Calderón, R.; Palma, P.; Eltit, K.; Arancibia‐Miranda, Nicolás; Silva-Moreno, Evelyn; Yu, Wantai

doi:10.1016/j.scitotenv.2020.137411

Cited by 17 publications

(8 citation statements)

References 36 publications

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“…Since the same climatic condition was attained, the difference in the uptake of perchlorate in Wuniuzao and Fuding Dabai were inclined to be the result of cultivar specificity. This is consistent with previous studies that the uptake and accumulation of perchlorate varies with species ,,− and even cultivars (e.g., rice cultivars and lettuce cultivars). ,, …”

Section: Resultssupporting

confidence: 93%

“…The uptake characteristics of perchlorate in several plants, e.g., lettuce, − cucumber, tomato, soybean, , rice, snap bean, chard and spinach, have been systematically studied by artificial cultivation and field experiments. Perchlorate uptake by plant roots, most probably an active process, were found to decrease linearly with nitrate increasing in the solution, , which indicated that perchlorate is likely to share the transport system of nitrate in plant roots.…”

Section: Introductionmentioning

confidence: 99%

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Uptake, Accumulation, Translocation, and Subcellular Distribution of Perchlorate in Tea (Camellia sinensis L.) Plants

Liang

Zhou

Zhang

et al. 2021

J. Agric. Food Chem.

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Perchlorate, emerging pollution with thyroid toxicity, has a high detection rate in fresh tea leaves. What needs attention is that the uptake characteristic is insufficiently understood. Herein, the uptake, accumulation, and translocation of perchlorate in a tea plant−hydroponic solution system were investigated, of which the mechanism was further lucubrated by subcellular distribution. The perchlorate concentration in tea tissues is ramped up along with the increase in the exposure level and time. The bioaccumulation factor of tea tissues followed the rank: mature leaves > tender leaves > roots. After the seedlings have been transplanted to a perchlorate-free solution, the perchlorate in mature leaves is reduced significantly, accompanied by a progressive increase in perchlorate in new shoots and solutions. The cell-soluble fractions are the major reservoir of perchlorate both for roots (>59%) and leaves (>76%), which precisely explained the translocation within the tea plant−hydroponic solution system. These results not only illuminate the uptake characteristic in tea plants but also improve the understanding of the behavior of perchlorate in higher plants.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Uptake, Accumulation, Translocation, and Subcellular Distribution of Perchlorate in Tea (Camellia sinensis L.) Plants

Liang

Zhou

Zhang

et al. 2021

J. Agric. Food Chem.

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“…Soil usually does not retain ClO 4 − and more than 90% is confined in the aqueous phase [ 58 ] where ClO 4 − spreads and persists due to its high solubility and resistance to photolysis and anaerobic bacterial biodegradation [ 59 ]. Fruits and vegetables represent a relevant food source of ClO 4 − , particularly because of the widespread use of perchlorate-based fertilizers [ 60 ]. In particular, leafy vegetables, spinach, salad plants, raspberries, apricots, asparagus, cantaloupes, and tomatoes accumulate ClO 4 − as a consequence of farming techniques [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, agronomic practices of fertilization may also contribute in this risk. As an example, fertigation is an innovative and less expensive methods of fertilization which allows for less water being wasted, better distribution of fertilizers and superior micronutrient assimilation by crops, but given these principles, it may be easier to foster more significant accumulations of ClO 4 -in fruits and vegetables [60].…”

Section: Discussionmentioning

confidence: 99%

Interference on Iodine Uptake and Human Thyroid Function by Perchlorate-Contaminated Water and Food

et al. 2020

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Background: Perchlorate-induced natrium-iodide symporter (NIS) interference is a well-recognized thyroid disrupting mechanism. It is unclear, however, whether a chronic low-dose exposure to perchlorate delivered by food and drinks may cause thyroid dysfunction in the long term. Thus, the aim of this review was to overview and summarize literature results in order to clarify this issue. Methods: Authors searched PubMed/MEDLINE, Scopus, Web of Science, institutional websites and Google until April 2020 for relevant information about the fundamental mechanism of the thyroid NIS interference induced by orally consumed perchlorate compounds and its clinical consequences. Results: Food and drinking water should be considered relevant sources of perchlorate. Despite some controversies, cross-sectional studies demonstrated that perchlorate exposure affects thyroid hormone synthesis in infants, adolescents and adults, particularly in the case of underlying thyroid diseases and iodine insufficiency. An exaggerated exposure to perchlorate during pregnancy leads to a worse neurocognitive and behavioral development outcome in infants, regardless of maternal thyroid hormone levels. Discussion and conclusion: The effects of a chronic low-dose perchlorate exposure on thyroid homeostasis remain still unclear, leading to concerns especially for highly sensitive patients. Specific studies are needed to clarify this issue, aiming to better define strategies of detection and prevention.

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“…Third, the efficiency of regulatory options might be affected by producer heterogeneity. The producer's heterogeneity is embodied in many ways, such as producers planting different crop varieties, which may include spinach accumulating almost two times more perchlorate than chard for all treatments [17]; producers in different economic areas that may not have sufficient access to certification or markets for crop farmers in poor areas [13]; producers in different environmental areas that can adversely impact the safety of honey under the mining field [18]; producers in different operation modes in which contract farming can reduce pollution more than noncontract farming [19]; and producers entering the organic sector with different time spans in which early adopters pay more attention to the environmental and healthy aspects of organic agriculture, whereas late adopters consider the economic benefits of organic farming more [20].…”

Section: Introductionmentioning

confidence: 99%

Local and Global Welfare When Regulating Organic Products: Should Local Regulation Target Production or Consumption?

Marette

2020

Sustainability

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Based on a welfare approach using a partial equilibrium model coming from microeconomics, this paper analyzes whether a local regulation aimed at reducing risks due to pesticides should be imposed at the production level or the consumption level. This paper characterizes the economic impact of these possible regulations from a theoretical point of view. Local and nonlocal producers compete only in the local market regarding selling conventional and organic products. Local producers incur variable costs related to reducing the risk of damage resulting from their new organic production methods. A local policymaker maximizing local welfare chooses either a regulation that is imposed on its local producers via production requirements or on all local and nonlocal producers via retail requirements that directly affect consumption. We show that local regulation is selected for relatively large values of damage. In this case, the organic regulation is influenced by whether the damage is incurred by residents and the environment close to the production site or by consumers. If the damage is incurred by residents and the environment close to the production site, only regulations targeting the local producers are selected, which improves the profits for nonlocal producers. Concerning damage incurred by consumers after their consumption, each type of regulation is selected depending on the cost of the safe technology, but the regulation targeting the consumption level harms nonlocal producers.

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Field study on the uptake, accumulation and risk assessment of perchlorate in a soil-chard/spinach system: Impact of agronomic practices and fertilization

Cited by 17 publications

References 36 publications

Uptake, Accumulation, Translocation, and Subcellular Distribution of Perchlorate in Tea (Camellia sinensis L.) Plants

Uptake, Accumulation, Translocation, and Subcellular Distribution of Perchlorate in Tea (Camellia sinensis L.) Plants

Interference on Iodine Uptake and Human Thyroid Function by Perchlorate-Contaminated Water and Food

Local and Global Welfare When Regulating Organic Products: Should Local Regulation Target Production or Consumption?

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