Manus Carey

Queen's University Belfast

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Andrew A. Meharg

Queen's University Belfast

Caroline Meharg

Queen's University Belfast

Antonio J. Signes‐Pastor

Instituto de investigación sanitaria y biomédica de Alicante

Paul N. Williams

Queen's University Belfast

Ellen Young

Texas A&M University

Júlia Gomes Farias

U.S. Arid Land Agricultural Research Center

Margaret R. Karagas

Dartmouth College

Christopher T. Elliott

Queen's University Belfast

P. Mangala C.S. De Silva

University of Ruhuna

Jesús Vioqué

Universitat de Miguel Hernández d'Elx

Cooperative Institutions

Queen's University Belfast

Instituto de Salud Carlos III

Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública

University of Ulster

Universitat de Miguel Hernández d'Elx

Instituto de investigación sanitaria y biomédica de Alicante

Bangladesh Agricultural University

Universidade Federal de Santa Maria

Royal Victoria Hospital

Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana

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Inorganic arsenic removal in rice bran by percolating cooking water

Food Chemistry (2017)

Antonio J. Signes‐Pastor Manus Carey Andrew A. Meharg

Ingredient

10.1016/j.foodchem.2017.04.140

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Citations (40)

Fertilization Enhances Grain Inorganic Arsenic Assimilation in Rice

Exposure and Health (2023)

Monira Begum Litian Li Ellen Young Manus Carey Gang Li

Abstract To investigate how soil fertilization/amendments alters arsenic speciation grain off-take in paddy rice, rice was grown to maturity in growth chambers fertilized with standard mineral fertilizer, wood ash (rich in silica), pig slurry (rich in organic matter), and non-amended control. The soil was sourced from a Chinese paddy field. The primary fertilized elements (nitrogen, phosphorus, potassium) were kept constant across treatments. Porewater chemistry and soil microbiology were monitored throughout the experiments. Total grain arsenic, sum of inorganic arsenic and dimethylarsinic acid (DMA), was significantly different between treatments ( P = 0.024), with inorganic arsenic varying from 0.025 to 0.08 mg/kg and DMA from 0.08 to 0.16 mg/kg for control compared to fertilized, respectively. Fertilizer source made no difference to arsenic speciation concentration in grain. Porewater analysis found that as anaerobism set in, inorganic arsenic, phosphorus and manganese greatly lowered in concentration. Methylated arsenic species concentrations increased over time, concurrent with an increase in pH, decrease in Eh, and increase in total organic carbon and iron, with no strong treatment effects, except for pig slurry that enhanced pH and decreased Eh. Methanogenic archaea, sulfate-reducing bacteria and Acidobacteria increased with time and some Actinobacteria and Firmicutes increased due to slurry, but then decreased with time ( P < 0.01). Methanogenic archaea and sulphate-reducing bacteria correlated positively with porewater DMA and negatively with porewater inorganic arsenic ( P < 0.05). Genera within the Actinobacteria and Burkholderiaceae correlated negatively with DMA, while genera with iron-reducing capacity (Clostridiales) correlated positively with porewater inorganic arsenic and DMA ( P < 0.05).

10.1007/s12403-023-00563-y

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Citations (4)

Rice Grain Cadmium Concentrations in the Global Supply-Chain

Exposure and Health (2020)

Zhengyu Shi Manus Carey Caroline Meharg Paul N. Williams Antonio J. Signes‐Pastor

Abstract One of cadmium’s major exposure routes to humans is through rice consumption. The concentrations of cadmium in the global polished (white), market rice supply-chain were assessed in 2270 samples, purchased from retailers across 32 countries, encompassing 6 continents. It was found on a global basis that East Africa had the lowest cadmium with a median for both Malawi and Tanzania at 4.9 μg/kg, an order of magnitude lower than the highest country, China with a median at 69.3 μg/kg. The Americas were typically low in cadmium, but the Indian sub-continent was universally elevated. In particular certain regions of Bangladesh had high cadmium, that when combined with the high daily consumption rate of rice of that country, leads to high cadmium exposures. Concentrations of cadmium were compared to the European Standard for polished rice of 200 μg/kg and 5% of the global supply-chain exceeded this threshold. For the stricter standard of 40 μg/kg for processed infant foods, for which rice can comprise up to 100% by composition (such as rice porridges, puffed rice cereal and cakes), 25% of rice would not be suitable for making pure rice baby foods. Given that rice is also elevated in inorganic arsenic, the only region of the world where both inorganic arsenic and cadmium were low in grain was East Africa.

White rice

Brown rice

10.1007/s12403-020-00349-6

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Citations (92)

Reducing the cadmium, inorganic arsenic and dimethylarsinic acid content of rice through food-safe chemical cooking pre-treatment

Food Chemistry (2020)

E. Pogoson Manus Carey Caroline Meharg Andrew A. Meharg

10.1016/j.foodchem.2020.127842

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Citations (14)

Water Dilutes and Alcohol Concentrates Urinary Arsenic Species When Food is the Dominant Source of Exposure

Exposure and Health (2019)

Natália Valadares de Moraes Manus Carey Charlotte E. Neville Sharon Cruise Bernadette McGuinness

10.1007/s12403-019-00329-5

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Citations (5)

Conserved histidine of metal transporter AtNRAMP1 is crucial for optimal plant growth under manganese deficiency at chilling temperatures

New Phytologist (2014)

Anna Ihnatowicz Joanna Siwinska Andrew A. Meharg Manus Carey Maarten Koornneef

Summary Manganese (Mn) is an essential nutrient required for plant growth, in particular in the process of photosynthesis. Plant performance is influenced by various environmental stresses including contrasting temperatures, light or nutrient deficiencies. The molecular responses of plants exposed to such stress factors in combination are largely unknown. Screening of 108 Arabidopsis thaliana (Arabidopsis) accessions for reduced photosynthetic performance at chilling temperatures was performed and one accession (Hog) was isolated. Using genetic and molecular approaches, the molecular basis of this particular response to temperature (G × E interaction) was identified. Hog showed an induction of a severe leaf chlorosis and impaired growth after transfer to lower temperatures. We demonstrated that this response was dependent on the nutrient content of the soil. Genetic mapping and complementation identified NRAMP 1 as the causal gene. Chlorotic phenotype was associated with a histidine to tyrosine (H239Y) substitution in the allele of Hog NRAMP 1. This led to lethality when Hog seedlings were directly grown at 4°C. Chemical complementation and hydroponic culture experiments showed that Mn deficiency was the major cause of this G × E interaction. For the first time, the NRAMP ‐specific highly conserved histidine was shown to be crucial for plant performance.

Chlorosis

10.1111/nph.12737

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Citations (32)

Feed-derived iodine overrides environmental contribution to cow milk

Journal of Dairy Science (2020)

Claire McKernan Caroline Meharg Manus Carey E. Donaldson Paul N. Williams

Silage

Agroecosystem

Iodised salt

10.3168/jds.2019-17446

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Citations (9)

Correction to: Global Sourcing of Low-Inorganic Arsenic Rice Grain

Exposure and Health (2020)

Manus Carey Caroline Meharg Paul N. Williams Ernest Marwa Jiujin Xiao

10.1007/s12403-019-00341-9

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Citations (4)

The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata

Biomass Conversion and Biorefinery (2016)

Peter Schiener Zhao SuFen Katerina Theodoridou Manus Carey Karen Mooney-McAuley

Ascophyllum

Fucales

Chitobiose

Brown algae

Pleurotus ostreatus

Laminaria digitata

Saccharina

10.1007/s13399-016-0227-5

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Citations (31)

Elevated Trimethylarsine Oxide and Inorganic Arsenic in Northern Hemisphere Summer Monsoonal Wet Deposition

Environmental Science & Technology (2017)

Laurie Savage Manus Carey Mahmud Hossain MR Islam P. Mangala C.S. De Silva

For arsenic speciation, the inputs for wet deposition are not well understood. Here we demonstrate that trimethylarsine oxide (TMAO) and inorganic arsenic are the dominant species in monsoonal wet deposition in the summer Indian subcontinent, Bangladesh, with inorganic arsenic dominating, accounting for ∼80% of total arsenic in this medium. Lower concentrations of both species were found in monsoonal wet deposition in the winter Indian subcontinent, Sri Lanka. The only other species present was dimethylarsinic acid (DMAA), but this was usually below limits of detection (LoD). We hypothesize that TMAO and inorganic arsenic in monsoonal wet deposition are predominantly of marine origin. For TMAO, the potential source is the atmospheric oxidation of marine derived trimethylarsine. For inorganic arsenic, our evidence suggests entrainment of water column inorganic arsenic into atmospheric particulates. These conclusions are based on weather trajectory analysis and on the strong correlations with known wet deposition marine derived elements: boron, iodine, and selenium. The finding that TMAO and inorganic arsenic are widely present and elevated in monsoonal wet deposition identifies major knowledge gaps that need to be addressed regarding the understanding of arsenic's global cycle.

Deposition

Western hemisphere

10.1021/acs.est.7b04356

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Citations (27)