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Cheseto X, Ochieng BO, Subramanian S, Tanga CM. Unravelling the nutritional and health benefits of marketable winged termites (Macrotermes spp.) as sustainable food sources in Africa. Sci Rep 2024; 14:9993. [PMID: 38693201 PMCID: PMC11063174 DOI: 10.1038/s41598-024-60729-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 04/26/2024] [Indexed: 05/03/2024] Open
Abstract
Termites are widely distributed globally and serve as a valuable food source in many countries. However, information on the myriad nutritional benefits of processed termite products in African markets remain largely unexploited. This study evaluated the phytochemicals, fatty acids, amino acids, minerals, vitamins and proximate composition of the edible winged termites (Macrotermes spp.) from three major Counties of Kenya. A total of 9 flavonoids, 5 alkaloids, and 1 cytokinin were identified. The oil content varied from 33 to 46%, exhibiting significant levels of beneficial omega 3 fatty acids, such as methyl (9Z,12Z,15Z)-octadecatrienoate and methyl (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate, ranging from 82.7-95.1 to 6.3-8.1 µg/g, respectively, across the different regions. Four essential and cereal-limiting amino acids lysine (1.0-1.3 mg/g), methionine (0.08-0.1 mg/g), leucine (0.6-0.9 mg/g) and threonine (0.1-0.2 mg/g), were predominant. Moreover, termites had a rich profile of essential minerals, including iron (70.7-111.8 mg/100 g), zinc (4.4-16.2 mg/100 g) and calcium (33.1-53.0 mg/100 g), as well as vitamins A (2.4-6.4 mg/kg), C (0.6-1.9 mg/kg) and B12 (10.7-17.1 mg/kg). The crude protein (32.2-44.8%) and fat (41.2-49.1%) contents of termites from the various Counties was notably high. These findings demonstrated the promising nutrients potential of winged termites and advocate for their sustainable utilization in contemporary efficacious functional food applications to combat malnutrition.
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Affiliation(s)
- Xavier Cheseto
- International Centre of Insect Physiology and Ecology (Icipe), P.O. BOX 30772-00100, Nairobi, Kenya.
| | - Brian O Ochieng
- International Centre of Insect Physiology and Ecology (Icipe), P.O. BOX 30772-00100, Nairobi, Kenya
| | - Sevgan Subramanian
- International Centre of Insect Physiology and Ecology (Icipe), P.O. BOX 30772-00100, Nairobi, Kenya
| | - Chrysantus M Tanga
- International Centre of Insect Physiology and Ecology (Icipe), P.O. BOX 30772-00100, Nairobi, Kenya
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Chilala P, Skalickova S, Horky P. Selenium Status of Southern Africa. Nutrients 2024; 16:975. [PMID: 38613007 PMCID: PMC11013911 DOI: 10.3390/nu16070975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 03/24/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
Selenium is an essential trace element that exists in inorganic forms (selenite and selenates) and organic forms (selenoamino acids, seleno peptides, and selenoproteins). Selenium is known to aid in the function of the immune system for populations where human immunodeficiency virus (HIV) is endemic, as studies suggest that a lack of selenium is associated with a higher risk of mortality among those with HIV. In a recent study conducted in Zambia, adults had a median plasma selenium concentration of 0.27 μmol/L (IQR 0.14-0.43). Concentrations consistent with deficiency (<0.63 μmol/L) were found in 83% of adults. With these results, it can be clearly seen that selenium levels in Southern Africa should be investigated to ensure the good health of both livestock and humans. The recommended selenium dietary requirement of most domesticated livestock is 0.3 mg Se/kg, and in humans above 19 years, anRDA (recommended daily allowance) of 55 mcg Se/per dayisis recommended, but most of the research findings of Southern African countries have recorded low levels. With research findings showing alarming low levels of selenium in soils, humans, and raw feed materials in Southern Africa, further research will be vital in answering questions on how best to improve the selenium status of Southern African soils and plants for livestock and humans to attain sufficient quantities.
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Affiliation(s)
| | | | - Pavel Horky
- Department of Animal Nutrition and Forage Production, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 3, 613 00 Brno, Czech Republic; (P.C.); (S.S.)
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Qian L, Wang T, Shi Y, Xu Q, Zhou X, Ke L, Liang R, Fu C, Zheng X, Sun G. Topsoil selenium (Se) under Se-rich farming in China: Current status, cropping impacts and ecological risk assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118918. [PMID: 37666134 DOI: 10.1016/j.jenvman.2023.118918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 09/06/2023]
Abstract
Selenium (Se), as an essential microelement, can be supplied through Se-biofortified food from Se-rich soils and associated farming practices for human health, while it can also cause eco-risks if overapplied. In this study, a multi-scale spatiotemporal meta-analysis was conducted to guide sustainable Se-rich farming in China by combining a long-term survey with a reviewed database. The weighted mean concentration, spatial distribution of soil Se, nationwide topsoil Se variation from cropping impacts and its bioavailability-based ecological risks were assessed and quantified. The results showed that the weighted mean content (0.3 mg kg-1) of China was slightly higher than that of previous nationwide topsoil Se surveys, as more Se-rich areas were found in recent high-density sampling surveys. Cropping has overall reduced Se content by 9.5% from farmland across China and deprived more with the increase in farming rotation driven by geo-climatic conditions. Long-term cropping removed Se from Se-rich areas but accumulated it in Se-deficient areas. Additionally, the bioavailable Se content of topsoil in China ranged from 0 to 332 μg kg-1, and the bioavailability-based eco-risks indicated that high eco-risks only existed in overfertilized and extremely high-Se soils, such as in Enshi, Ziyang and some coalfield areas. This work provides evidence for the development of sustainable Se-rich farming with proper utilization of soil Se resources, simultaneously protecting the soil eco-environment.
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Affiliation(s)
- Li Qian
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ting Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yajuan Shi
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Qiuyun Xu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xuan Zhou
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lingjie Ke
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ruoyu Liang
- School of Biosciences, The University of Sheffield, Sheffield, S10 2TN, United Kingdom
| | - Chuancheng Fu
- Red Sea Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Xiaoqi Zheng
- School of Economics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Guoxin Sun
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
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Njiru L, Yegon J, Mwithiga G, Micheni A, Gitari N, Mairura F. Restoring soil nutrient stocks using local inputs, tillage and sorghum-green gram intercropping strategies for drylands in Eastern Kenya. Heliyon 2023; 9:e20926. [PMID: 37876491 PMCID: PMC10590955 DOI: 10.1016/j.heliyon.2023.e20926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/07/2023] [Accepted: 10/11/2023] [Indexed: 10/26/2023] Open
Abstract
Soil macronutrient and micronutrient availability is particularly critical in semi-arid agro-ecological zones that are characterized by poor soil fertility and low rainfall regimes. An experiment was initiated in Siakago, Embu County to investigate the effects of tied-ridges, conventional tillage and input applications on soil nutrient fertility using a randomized complete block design with a split-split plot arrangement for 4 seasons (2018-2021). The treatments comprised of two main plot tillage systems, three cropping systems allocated to the sub-plots and four soil input management treatments assigned to sub-sub plots. ANOVA was used to test the effects of different treatments including tillage, crop system and soil fertility management using Genstat software. The data was also subjected to Principal Component Analysis procedures using R ("FactoMineR" and "factoextra") to examine the inter-relationship patterns between different soil fertility parameters and to reduce the data into independent soil fertility components. There were significant main effects due to crop system (Soil Mn), tillage and crop system interaction (SOC and TSN) and soil fertility management (TOC, TSN, Ca, Zn). Soil inputs significantly influenced soil carbon concentrations (p = 0.002), with the lowest values observed in the control (0.2 %), followed by sole fertilizer (0.35 %), manure + fertilizer (0.41 %) and the fully decomposed manure treatment (0.61 %). The soil-extracted manganese values recorded significant effects due to crop system, while soil-extracted Zn values were significant due to soil fertility management. Multivariate analysis results revealed the structure of soil nutrient distribution. Tied ridging can improve soil micronutrient availability through reduced soil erosion, conservation of soil organic matter, which can improve soil micronutrient availability. Soil conservation practices such as tied-ridging integrated with organic input applications can enhance multiple nutrient availability for improved crop performance and human nutrition in dryland farming systems where farmers lack soil moisture, technologies and resources to enhance crop nutrient availability.
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Affiliation(s)
- L.G. Njiru
- University of Embu, Department Water and Agricultural Resource Management, P.O. Box 6-, 601600, Embu, Kenya
| | - J.R. Yegon
- University of Embu, Department Water and Agricultural Resource Management, P.O. Box 6-, 601600, Embu, Kenya
| | - G. Mwithiga
- University of Embu, Department Water and Agricultural Resource Management, P.O. Box 6-, 601600, Embu, Kenya
| | - A. Micheni
- Kenya Agricultural and Livestock Research Organization, Food Crops Research Institute, P.O. Box 27 – , 60100, Embu, Kenya
| | - N.J. Gitari
- University of Embu, Department Water and Agricultural Resource Management, P.O. Box 6-, 601600, Embu, Kenya
| | - F.S. Mairura
- University of Embu, Department Water and Agricultural Resource Management, P.O. Box 6-, 601600, Embu, Kenya
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Li J, Huang C, Lai L, Wang L, Li M, Tan Y, Zhang T. Selenium hyperaccumulator plant Cardamine enshiensis: from discovery to application. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:5515-5529. [PMID: 37355493 DOI: 10.1007/s10653-023-01595-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 04/25/2023] [Indexed: 06/26/2023]
Abstract
Selenium (Se) is an essential trace element for animals and humans. Se biofortification and Se functional agriculture are emerging strategies to satisfy the needs of people who are deficient in Se. With 200 km2 of Se-excess area, Enshi is known as the "world capital of Se." Cardamine enshiensis (C. enshiensis) is a Se hyperaccumulation plant discovered in the Se mine drainage area of Enshi. It is edible and has been approved by National Health Commission of the People's Republic of China as a new source of food, and the annual output value of the Se-rich industry in Enshi City exceeds 60 billion RMB. This review will mainly focus on the discovery and mechanism underlying Se tolerance and Se hyperaccumulation in C. enshiensis and highlight its potential utilization in Se biofortification agriculture, graziery, and human health.
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Affiliation(s)
- Jiao Li
- Cancer Center, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Chuying Huang
- Cancer Center, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Hubei Selenium and Human Health Institute, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, Hubei, China.
| | - Lin Lai
- Hubei Selenium and Human Health Institute, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, Hubei, China
| | - Li Wang
- Hubei Selenium and Human Health Institute, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, Hubei, China
| | - Minglong Li
- Second Geological Brigade of Hubei Geological Bureau, Enshi, 445000, Hubei, China
| | - Yong Tan
- Hubei Selenium and Human Health Institute, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, Hubei, China
| | - Tao Zhang
- Cancer Center, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Mwesigye RA, Mwavu N E. Forage accumulation of potentially toxic elements (PTEs) from soils around Kilembe copper mine, Western Uganda. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:151-158. [PMID: 37424097 DOI: 10.1080/15226514.2023.2231550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
Past copper mining within Kilembe valley between 1956-1982 left behind mine tailings rich in potentially toxic elements (PTEs). This study was conducted to assess the concentrations of PTEs in soils and the potential uptake by forage. Tailings, soils and forage were collected and analyzed using ICP-MS. The study established that over 60% of grazed plots contained high concentrations of Cu, Co, Ni and As. Copper in 35%, Co in 48% and Ni in 58% of forage soil plots exceeded the thresholds for agricultural soils. Bio-accumulation of Zn and Cu, was observed. Zinc in 14% of guinea grass (Panicum maximum), 33% coach grass (Digitalia Scarulum) and in 20% of elephant grasses (Penisetum perpureun) exceeded thresholds of 100-150 mg kg-1. Copper (Cu) concentrations in 20% of Penisetum perpureun and 14% of Digitalia Scarulum exceeded grazing thresholds of 25 mg kg-1. Containment of tailing erosion should be explored to control erosion of tailings into grazing areas.
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Affiliation(s)
| | - Edward Mwavu N
- School of Forestry, Environment and Geographical Sciences, Makerere University, Kampala, Uganda
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Mlangeni AT, Chinthenga E, Kapito NJ, Namaumbo S, Feldmann J, Raab A. Safety of African grown rice: Comparative review of As, Cd, and Pb contamination in African rice and paddy fields. Heliyon 2023; 9:e18314. [PMID: 37519744 PMCID: PMC10375803 DOI: 10.1016/j.heliyon.2023.e18314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/07/2023] [Accepted: 07/13/2023] [Indexed: 08/01/2023] Open
Abstract
This review aimed to investigate the reported concentrations of arsenic (As), cadmium (Cd), and lead (Pb) in rice cultivated in Africa and African rice paddies compared to other regions. It also aimed to explore the factors influencing these concentrations and evaluate the associated health risks of elevated As, Cd, and Pb exposure. Relevant data were obtained from electronic databases such as PubMed, Scopus, and Google Scholar using specific keywords related to arsenic, cadmium, lead, rice, Africa, paddy, and grain. While the number of studies reporting the concentrations of As, Cd, and Pb in rice and rice paddies in Africa is relatively low compared to other regions, this review revealed that most of the African rice and paddy soils have low concentrations of these metals. However, some studies have reported elevated concentrations of As, Cd, and Pb in paddy fields, which is concerning due to the increased use of agrochemicals containing heavy metals in rice production. Nonetheless, agronomical interventions such as implementing alternate wetting and drying water management, cultivating cultivars with low accumulation of As, Cd, and Pb, amending rice fields with sorbents, and screening irrigation water can limit the bioaccumulation of these carcinogens in paddy fields using phytoremediation techniques. Therefore, we strongly urge African governments and organizations operating in Africa to enhance the capacity of rice farmers and extension officers in adopting approaches and practices that reduce the accumulation of these carcinogenic metals in rice. This is essential to achieve the sustainable development goal of providing safe food for all.
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Affiliation(s)
- Angstone Thembachako Mlangeni
- Department of Land and Water Resources, Natural Resources College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Evans Chinthenga
- Department of Land and Water Resources, Natural Resources College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Noel Jabesi Kapito
- Department of Land and Water Resources, Natural Resources College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Sydney Namaumbo
- Department of Land and Water Resources, Natural Resources College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Joerg Feldmann
- TESLA Analytical Chemistry, Institute of Chemistry, University of Graz, Austria
| | - Andrea Raab
- TESLA Analytical Chemistry, Institute of Chemistry, University of Graz, Austria
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Sach F, Fields L, Chenery S, Yon L, Henley MD, Buss P, Dierenfeld ES, Langley-Evans SC, Watts MJ. Method development to characterise elephant tail hairs by LA-ICP-MS to reflect changes in elemental chemistry. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:1153-1164. [PMID: 35129705 PMCID: PMC10060304 DOI: 10.1007/s10653-022-01207-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
This paper evaluated analytical methods used to generate time-series data from elephant tail hairs, which can be used to reflect changing exposure to environmental geochemistry. Elephant tail hairs were analysed by three methods sequentially, each providing data to inform subsequent analysis. Scanning Electron Microscopy (SEM) and X-ray Microanalysis visually showed the structure of the hair, specific structures such as tubules, and the mineral crusting around the edge of the hair, informing targeting of subsequent analysis by Laser Ablation-Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). LA-ICP-MS generated time-series data which informed sectioning of the tail hairs for subsequent quantitative analysis for potentially toxic elements and micronutrients using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) of dissolved tail hairs. This novel approach to characterise the tail hair enabled time-series analysis to reflect changes in environmental exposure which may result from seasonal or geochemical spatial variation and could inform elephant movement patterns. The seasonal change between wet and dry seasons was reflected down the length of the hair. Correlations were seen between LA-ICP-MS data and ICP-MS data in several elements including Mg, P, Ca, Fe, Na, Mn and U. This study provided time-series data for the analysis of elephant tail hairs by evaluating analytical challenges to obtaining quantitative data, such as improving protocols to ensure removal of extraneous material, determining where to section the tail hairs to best reflect environmental changes/exposure and ensuring representative analyses. A protocol was established to determine mineral status across a 12-18 month time period utilizing single elephant tail hairs.
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Affiliation(s)
- Fiona Sach
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, UK
- School of Biosciences, University of Nottingham, Nottingham, UK
| | - Lorraine Fields
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, UK
| | - Simon Chenery
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, UK
| | - Lisa Yon
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
| | - Michelle D Henley
- Applied Behavioural Ecology and Environmental Research Unit, University of South Africa, Pretoria, South Africa
- Elephants Alive, Bosbokrand, Limpopo, South Africa
| | - Peter Buss
- Veterinary Wildlife Services, South African National Parks, Kimberley, South Africa
| | - Ellen S Dierenfeld
- LLC, Saint Louis, MO, 63128, USA
- School of Animal, Rural & Environmental Sciences, Nottingham Trent University, Nottingham, UK
| | | | - Michael J Watts
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, UK.
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de la Revilla LS, Ferguson E, Dooley C, Osman G, Ander L, Joy EJ. The availability and geographic location of open-source food composition data used to estimate micronutrient intakes in sub-Saharan Africa: A scoping review. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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10
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Shetaya WH, Bailey EH, Young SD, Mohamed EF, Antoniadis V, Rinklebe J, Shaheen SM, Marzouk ER. Soil and plant contamination by potentially toxic and emerging elements and the associated human health risk in some Egyptian environments. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:359-379. [PMID: 34676511 DOI: 10.1007/s10653-021-01097-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
The aim of this work was to assess the origins, mobility, bioavailability and potential health risks of V, Cr, Co, As, Se, Mo, Cd, Sn and Sb, which are not sufficiently studied in the terrestrial environment of Egypt. This has been carried out by employing a combination of chemical fractionation, plants uptake, mathematical modeling and risk assessment approaches on a wide range of soils and plants sampled from industrial, urban and agricultural locations across Egypt. The contents of As, Cd, Sn and Sb were elevated in the soils of some urban and industrial locations within Cairo, although their soil geo-accumulation (Igeo) indices remained ≤ 2, indicating only moderate contamination. Selenium showed moderate to heavy contamination levels (Igeo up to 4.7) in all sampling locations, and Sb was highly elevated (Igeo = 7.1; extreme contamination) in one industrial location. Therefore, Se was the most important contributor to the pollution load followed by Sb and Cd. Both principle component analysis (of total content) and geochemical fractionation (by sequential extraction) suggested that V, Cr and Co are mostly of geogenic origin, while Se and Sb contents appear to be highly influenced by anthropogenic inputs. The most mobile and bioavailable element was Cd with a large non-residual fraction in all soils (76% of total Cd). The bio-concentration factors of Cd in leafy and fruiting plants were 50 times larger than other elements (except Mo) indicating preferential systematic plant uptake of Cd. Risk assessment models showed an overall low noncarcinogenic and carcinogenic risks to the population of Egypt due to the studied elements with only a few anomalies.
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Affiliation(s)
- Waleed H Shetaya
- Air Pollution Research Department, Environmental Research Division, National Research Centre, 33 El-Bohouth St., Dokki, 12622, Giza, Egypt.
| | - Elizabeth H Bailey
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK
| | - Scott D Young
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK
| | - Elham F Mohamed
- Air Pollution Research Department, Environmental Research Division, National Research Centre, 33 El-Bohouth St., Dokki, 12622, Giza, Egypt
| | - Vasileios Antoniadis
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Volos, Greece
| | - Jörg Rinklebe
- School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste Management, Laboratory of Soil- and Groundwater-Management, University of Wuppertal, Pauluskirchstraße 7, 42285, Wuppertal, Germany
- Department of Environment, Energy and Geoinformatics, Sejong University, Seoul, 05006, Republic of Korea
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, Himachal Pradesh, 173212, India
| | - Sabry M Shaheen
- School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste Management, Laboratory of Soil- and Groundwater-Management, University of Wuppertal, Pauluskirchstraße 7, 42285, Wuppertal, Germany.
- Faculty of Meteorology, Environment and Arid Land Agriculture, Department of Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
- Faculty of Agriculture, Department of Soil and Water Sciences, University of Kafrelsheikh, Kafr El-Sheikh, 33 516, Egypt.
| | - Ezzat R Marzouk
- Division of Soil and Water Sciences, Faculty of Environmental Agricultural Sciences, Arish University, North Sinai, 45516, Egypt.
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11
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Bioaccessibility of iron in pearl millet flour contaminated with different soil types. Food Chem 2023; 402:134277. [DOI: 10.1016/j.foodchem.2022.134277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 09/09/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022]
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12
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Biological Activity of Selenium and Its Impact on Human Health. Int J Mol Sci 2023; 24:ijms24032633. [PMID: 36768955 PMCID: PMC9917223 DOI: 10.3390/ijms24032633] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/03/2023] Open
Abstract
Selenium (Se) is a naturally occurring metalloid element essential to human and animal health in trace amounts but it is harmful in excess. Se plays a substantial role in the functioning of the human organism. It is incorporated into selenoproteins, thus supporting antioxidant defense systems. Selenoproteins participate in the metabolism of thyroid hormones, control reproductive functions and exert neuroprotective effects. Among the elements, Se has one of the narrowest ranges between dietary deficiency and toxic levels. Its level of toxicity may depend on chemical form, as inorganic and organic species have distinct biological properties. Over the last decades, optimization of population Se intake for the prevention of diseases related to Se deficiency or excess has been recognized as a pressing issue in modern healthcare worldwide. Low selenium status has been associated with an increased risk of mortality, poor immune function, cognitive decline, and thyroid dysfunction. On the other hand, Se concentrations slightly above its nutritional levels have been shown to have adverse effects on a broad spectrum of neurological functions and to increase the risk of type-2 diabetes. Comprehension of the selenium biochemical pathways under normal physiological conditions is therefore an important issue to elucidate its effect on human diseases. This review gives an overview of the role of Se in human health highlighting the effects of its deficiency and excess in the body. The biological activity of Se, mainly performed through selenoproteins, and its epigenetic effect is discussed. Moreover, a brief overview of selenium phytoremediation and rhizofiltration approaches is reported.
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13
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Hussein RA, Ahmed M, Kuldyushev N, Schönherr R, Heinemann SH. Selenomethionine incorporation in proteins of individual mammalian cells determined with a genetically encoded fluorescent sensor. Free Radic Biol Med 2022; 192:191-199. [PMID: 36152916 DOI: 10.1016/j.freeradbiomed.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/14/2022] [Accepted: 09/17/2022] [Indexed: 11/26/2022]
Abstract
Selenomethionine (SeMet) randomly replaces methionine (Met) in protein translation. Because of strongly differing redox properties of SeMet and Met, SeMet mis-incorporation may have detrimental effects on protein function, possibly compromising the use of nutritional SeMet supplementation as an anti-oxidant. Studying the functional impact of SeMet in proteins on a cellular level is hampered by the lack of accurate and efficient methods for estimating the SeMet incorporation level in individual viable cells. Here we introduce and apply a method to measure the extent of SeMet incorporation in cellular proteins by utilizing a genetically encoded fluorescent methionine oxidation probe. Supplementation of SeMet in mammalian culture medium resulted in >84% incorporation of SeMet, and SeMet labeling as low as 5% was readily measured. Kinetics and extent of SeMet incorporation on the single-cell level under live-cell imaging conditions provided direct access to protein turn-over kinetics and SeMet redox properties in a cellular context. The method is furthermore suited for experiments utilizing high-throughput fluorescence microplate readers or fluorescence-activated cell sorting (FACS) analysis.
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Affiliation(s)
- Rama A Hussein
- Center for Molecular Biomedicine, Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Jena, Germany
| | - Marwa Ahmed
- Center for Molecular Biomedicine, Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Jena, Germany
| | - Nikita Kuldyushev
- Center for Molecular Biomedicine, Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Jena, Germany
| | - Roland Schönherr
- Center for Molecular Biomedicine, Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Jena, Germany
| | - Stefan H Heinemann
- Center for Molecular Biomedicine, Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Jena, Germany.
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14
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Cunha MLO, Oliveira LCAD, Silva VM, Montanha GS, Reis ARD. Selenium increases photosynthetic capacity, daidzein biosynthesis, nodulation and yield of peanuts plants (Arachis hypogaea L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 190:231-239. [PMID: 36137309 DOI: 10.1016/j.plaphy.2022.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/04/2022] [Accepted: 08/11/2022] [Indexed: 06/16/2023]
Abstract
This study aimed to investigate the roles of selenium (Se) application on the profile of photosynthetic pigments, oxidant metabolism, flavonoids biosynthesis, nodulation, and its relation to agronomic traits of peanut plants. Two independent experiments were carried out: one conducted in soil and the other in a nutrient solution. When the plants reached the V2 growth stage, five Se doses (0, 7.5, 15, 30, and 45 μg kg-1) and four Se concentrations (0, 5, 10, and 15 μmol L-1) were supplied as sodium selenate. The concentration of photosynthetic pigments, activity of antioxidant enzymes and the concentration of total sugars in peanut leaves increased in response to Se fertilization. In addition, Se improves nitrogen assimilation efficiency by increasing nitrate reductase activity which results in a higher concentration of ureides, amino acids and proteins. Se increases the synthesis of daidzein and genistein in the root, resulting in a greater number of nodules and concentration and transport of ureides to the leaves. Se-treated plants showed greater growth, biomass accumulation in shoots and roots, yield and Se concentration in leaves and grains. Our results contribute to food security and also to increase knowledge about the effects of Se on physiology, biochemistry and biological nitrogen fixation in legume plants.
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Affiliation(s)
- Matheus Luís Oliveira Cunha
- São Paulo State University, Faculty of Agricultural and Veterinary Sciences, Via de Acesso Prof. Paulo Donato Castellane, 14884-900, Jaboticabal, São Paulo, Brazil
| | - Lara Caroline Alves de Oliveira
- São Paulo State University, Faculty of Agricultural and Veterinary Sciences, Via de Acesso Prof. Paulo Donato Castellane, 14884-900, Jaboticabal, São Paulo, Brazil
| | - Vinicius Martins Silva
- São Paulo State University, Faculty of Agricultural and Veterinary Sciences, Via de Acesso Prof. Paulo Donato Castellane, 14884-900, Jaboticabal, São Paulo, Brazil
| | - Gabriel Sgarbiero Montanha
- University of São Paulo, Centre for Nuclear Energy in Agriculture, Laboratory of Nuclear Instrumentation, Avenida Centenário, 303, 13400-970, Piracicaba, Brazil
| | - André Rodrigues Dos Reis
- São Paulo State University (UNESP), School of Science and Engineering, Rua Domingos da Costa Lopes 780, 17602-496, Tupã, Brazil.
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15
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Mutonhodza B, Joy EJM, Bailey EH, Lark MR, Kangara MGM, Broadley MR, Matsungo TM, Chopera P. Linkages between soil, crop, livestock, and human selenium status in Sub-Saharan Africa: a scoping review. Int J Food Sci Technol 2022; 57:6336-6349. [PMID: 36605250 PMCID: PMC9804181 DOI: 10.1111/ijfs.15979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 07/11/2022] [Indexed: 01/07/2023]
Abstract
Selenium (Se) is essential for human health, however, data on population Se status and agriculture-nutrition-health linkages are limited in sub-Saharan Africa (SSA). The scoping review aims to identify linkages between Se in soils/crops, dietary Se intakes, and livestock and human Se status in SSA. Online databases, organisational websites and grey literature were used to identify articles. Articles were screened at title, abstract and full text levels using eligibility criteria. The search yielded 166 articles from which 112 were excluded during abstract screening and 54 full text articles were assessed for eligibility. The scoping review included 34 primary studies published between 1984 and 2021. The studies covered Se concentrations in soils (n = 7), crops (n = 9), animal tissues (n = 2), livestock (n = 3), and human Se status (n = 15). The evidence showed that soil/crop Se concentrations affected Se concentration in dietary sources, dietary Se intake and biomarkers of Se status. Soil types are a primary driver of human Se status and crop Se concentration correlates positively with biomarkers of Se dietary status. Although data sets of Se concentrations exist across the food system in SSA, there is limited evidence on linkages across the agriculture-nutrition nexus. Extensive research on Se linkages across the food chain is warranted.
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Affiliation(s)
- Beaula Mutonhodza
- Department of Nutrition, Dietetics and Food SciencesUniversity of ZimbabweP.O. Box MP167, Mt PleasantHarareZimbabwe
| | - Edward J. M. Joy
- London School for Hygiene and Tropical MedicineKeppel StreetLondonWC1E 7HTUK,Rothamsted ResearchWest CommonHarpendenAL5 2JQUK
| | - Elizabeth H. Bailey
- School of BiosciencesUniversity of NottinghamSutton Bonington CampusLoughboroughLeicestershireLE12 5RDUK
| | - Murray R. Lark
- School of BiosciencesUniversity of NottinghamSutton Bonington CampusLoughboroughLeicestershireLE12 5RDUK
| | | | - Martin R. Broadley
- Rothamsted ResearchWest CommonHarpendenAL5 2JQUK,School of BiosciencesUniversity of NottinghamSutton Bonington CampusLoughboroughLeicestershireLE12 5RDUK
| | - Tonderayi M. Matsungo
- Department of Nutrition, Dietetics and Food SciencesUniversity of ZimbabweP.O. Box MP167, Mt PleasantHarareZimbabwe
| | - Prosper Chopera
- Department of Nutrition, Dietetics and Food SciencesUniversity of ZimbabweP.O. Box MP167, Mt PleasantHarareZimbabwe
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16
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Estimates of Dietary Mineral Micronutrient Supply from Staple Cereals in Ethiopia at a District Level. Nutrients 2022; 14:nu14173469. [PMID: 36079728 PMCID: PMC9459787 DOI: 10.3390/nu14173469] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 11/20/2022] Open
Abstract
Recent surveys have revealed substantial spatial variation in the micronutrient composition of cereals in Ethiopia, where a single national micronutrient concentration values for cereal grains are of limited use for estimating typical micronutrient intakes. We estimated the district-level dietary mineral supply of staple cereals, combining district-level cereal production and crop mineral composition data, assuming cereal consumption of 300 g capita−1 day−1 proportional to district-level production quantity of each cereal. We considered Barley (Hordeum vulgare L.), maize (Zea mays L.), sorghum (Sorghum bicolor (L.) Moench), teff (Eragrostis tef (Zuccagni) Trotter), and wheat (Triticum aestivum L.) consumption representing 93.5% of the total cereal production in the three major agrarian regions. On average, grain cereals can supply 146, 23, and 7.1 mg capita−1 day−1 of Ca, Fe, and Zn, respectively. In addition, the Se supply was 25 µg capita−1 day−1. Even at district-level, cereals differ by their mineral composition, causing a wide range of variation in their contribution to the daily dietary requirements, i.e., for an adult woman: 1–48% of Ca, 34–724% of Fe, 17–191% of Se, and 48–95% of Zn. There was considerable variability in the dietary supply of Ca, Fe, Se, and Zn from staple cereals between districts in Ethiopia.
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17
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Chen H, Cheng Q, Chen Q, Ye X, Qu Y, Song W, Fahad S, Gao J, Saud S, Xu Y, Shen Y. Effects of Selenium on Growth and Selenium Content Distribution of Virus-Free Sweet Potato Seedlings in Water Culture. FRONTIERS IN PLANT SCIENCE 2022; 13:965649. [PMID: 35874011 PMCID: PMC9298572 DOI: 10.3389/fpls.2022.965649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Understanding the selenium tolerance of different sweet potato [Dioscorea esculenta (Lour.) Burkill] is essential for simultaneously for breeding of new selenium-tolerant varieties and improving the selenium content in sweet potato. Therefore, a greenhouse experiment was conducted from February to April 2022 to evaluate the effect of sweet potato cultivars and selenium (Na2SeO3) concentrations (0-40 mg/L) on plant growth, physiological activities and plant selenium content distribution. The results showed that when the selenium concentration was more than 3 mg/L, the plant growth was significantly affected and the plant height and root length were significantly different compared to the control. While the selenium concentration was 20 and 40 mg/L had the greatest effect on plant growth when the number of internodes and leaves of the plant decreased, the root system stopped growing and the number of internodes of the plant, the number of leaves and the dry-to-fresh weight ratio of the plant a very significant level compared to reached control. The relative amount of chlorophyll in leaves under treatment with a selenium concentration of 1 mg/L was increased, and the relative amount of chlorophyll in 3 mg/L leaves gradually increased with the increase in the selenium concentration. The values of the maximum photochemical efficiency PSII (fv/fm) and the potential activity of PSII (fv/fo) compared to the control under treatment with 40 mg/L selenium concentration and photosynthesis of plants was inhibited. The selenium content in root, stem and leaf increased with the increase in selenium concentration, and the distribution of selenium content in the plant was leaf <stem <root, and the selenium content in root was significantly higher than that in stem and leaf. In summary, the appropriate concentration of selenium tolerance has been determined to be 3 mg/L. The aquatic culture identification method of selenium tolerance of sweet potatoes and growth indices of various selenium tolerant varieties (lines) established in this study will provide a technical basis for selenium tolerant cultivation and mechanism research.
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Affiliation(s)
- Huoyun Chen
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Qun Cheng
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Qiaoling Chen
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Xingzhi Ye
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Yong Qu
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Weiwu Song
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
| | - Shah Fahad
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Department of Agronomy, Faculty of Agricultural Sciences, The University of Haripur, Haripur, Pakistan
| | - Jianhua Gao
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
| | - Shah Saud
- College of Life Science, Linyi University, Linyi, China
| | - Yi Xu
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
- Enshi Comprehensive Test Station of Sweet Potato Industry Technology System, Enshi, China
| | - Yanfen Shen
- Academy of Agricultural Sciences, Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
- Hubei Enshi South China Potato Research Center, Enshi, China
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18
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Andrés-Hernández L, Blumberg K, Walls RL, Dooley D, Mauleon R, Lange M, Weber M, Chan L, Malik A, Møller A, Ireland J, Segovia L, Zhang X, Burton-Freeman B, Magelli P, Schriever A, Forester SM, Liu L, King GJ. Establishing a Common Nutritional Vocabulary - From Food Production to Diet. Front Nutr 2022; 9:928837. [PMID: 35811979 PMCID: PMC9265659 DOI: 10.3389/fnut.2022.928837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 05/17/2022] [Indexed: 11/13/2022] Open
Abstract
Informed policy and decision-making for food systems, nutritional security, and global health would benefit from standardization and comparison of food composition data, spanning production to consumption. To address this challenge, we present a formal controlled vocabulary of terms, definitions, and relationships within the Compositional Dietary Nutrition Ontology (CDNO, www.cdno.info) that enables description of nutritional attributes for material entities contributing to the human diet. We demonstrate how ongoing community development of CDNO classes can harmonize trans-disciplinary approaches for describing nutritional components from food production to diet.
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Affiliation(s)
| | - Kai Blumberg
- Department of Biosystems Engineering, University of Arizona, Tucson, AZ, United States
| | - Ramona L. Walls
- Department of Biosystems Engineering, University of Arizona, Tucson, AZ, United States
- Data Collaboration Center at the Critical Path Institute, Tucson, AZ, United States
| | - Damion Dooley
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Ramil Mauleon
- Southern Cross Plant Science, Southern Cross University, Lismore, NSW, Australia
| | - Matthew Lange
- International Center for Food Ontology Operability Data & Semantics (IC-FOODS), Davis, CA, United States
| | | | - Lauren Chan
- Nutrition Department, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
| | - Adnan Malik
- European Bioinformatics Institute, European Molecular Biology Laboratory (EMBL-EBI), Hinxton, United Kingdom
| | | | | | - Lucia Segovia
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
| | - Xuhuiqun Zhang
- Illinois Institute of Technology, Chicago, IL, United States
| | | | | | | | | | - Lei Liu
- Southern Cross Plant Science, Southern Cross University, Lismore, NSW, Australia
| | - Graham J. King
- Southern Cross Plant Science, Southern Cross University, Lismore, NSW, Australia
- School of Biosciences, University of Nottingham, Sutton Bonington, United Kingdom
- *Correspondence: Graham J. King
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19
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Botoman L, Chagumaira C, Mossa AW, Amede T, Ander EL, Bailey EH, Chimungu JG, Gameda S, Gashu D, Haefele SM, Joy EJM, Kumssa DB, Ligowe IS, McGrath SP, Milne AE, Munthali M, Towett E, Walsh MG, Wilson L, Young SD, Broadley MR, Lark RM, Nalivata PC. Soil and landscape factors influence geospatial variation in maize grain zinc concentration in Malawi. Sci Rep 2022; 12:7986. [PMID: 35568698 PMCID: PMC9107474 DOI: 10.1038/s41598-022-12014-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 05/03/2022] [Indexed: 11/25/2022] Open
Abstract
Dietary zinc (Zn) deficiency is widespread globally, and in particular among people in sub-Saharan Africa (SSA). In Malawi, dietary sources of Zn are dominated by maize and spatially dependent variation in grain Zn concentration, which will affect dietary Zn intake, has been reported at distances of up to ~ 100 km. The aim of this study was to identify potential soil properties and environmental covariates which might explain this longer-range spatial variation in maize grain Zn concentration. Data for maize grain Zn concentrations, soil properties, and environmental covariates were obtained from a spatially representative survey in Malawi (n = 1600 locations). Labile and non-labile soil Zn forms were determined using isotopic dilution methods, alongside conventional agronomic soil analyses. Soil properties and environmental covariates as potential predictors of the concentration of Zn in maize grain were tested using a priori expert rankings and false discovery rate (FDR) controls within the linear mixed model (LMM) framework that informed the original survey design. Mean and median grain Zn concentrations were 21.8 and 21.5 mg kg−1, respectively (standard deviation 4.5; range 10.0–48.1). A LMM for grain Zn concentration was constructed for which the independent variables: soil pH(water), isotopically exchangeable Zn (ZnE), and diethylenetriaminepentaacetic acid (DTPA) extractable Zn (ZnDTPA) had predictive value (p < 0.01 in all cases, with FDR controlled at < 0.05). Downscaled mean annual temperature also explained a proportion of the spatial variation in grain Zn concentration. Evidence for spatially dependent variation in maize grain Zn concentrations in Malawi is robust within the LMM framework used in this study, at distances of up to ~ 100 km. Spatial predictions from this LMM provide a basis for further investigation of variations in the contribution of staple foods to Zn nutrition, and where interventions to increase dietary Zn intake (e.g. biofortification) might be most effective. Other soil and landscape factors influencing spatially dependent variation in maize grain Zn concentration, along with factors operating over shorter distances such as choice of crop variety and agronomic practices, require further exploration beyond the scope of the design of this survey.
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Affiliation(s)
- L Botoman
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Bunda College Campus, P.O. Box 219, Lilongwe, Malawi.,The Department of Agricultural Research Services, P.O. Box 30779, Lilongwe 3, Malawi
| | - C Chagumaira
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Bunda College Campus, P.O. Box 219, Lilongwe, Malawi.,School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK.,Future Food Beacon, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK.,Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - A W Mossa
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - T Amede
- Alliance for Green Revolution in Africa (AGRA), o/C, ILRI, Guidoshola, P.O. Box 5689, Addis Ababa, Ethiopia
| | - E L Ander
- Centre for Environmental Geochemistry, British Geological Survey, Keyworth, Nottinghamshire, NG12 5GG, UK
| | - E H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - J G Chimungu
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Bunda College Campus, P.O. Box 219, Lilongwe, Malawi
| | - S Gameda
- International Maize and Wheat Improvement Center (CIMMYT), ILRI Sholla Campus, P.O. Box 5689, Addis Ababa, Ethiopia
| | - D Gashu
- Centre for Food Science and Nutrition, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - S M Haefele
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - E J M Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - D B Kumssa
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - I S Ligowe
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Bunda College Campus, P.O. Box 219, Lilongwe, Malawi.,The Department of Agricultural Research Services, P.O. Box 30779, Lilongwe 3, Malawi
| | - S P McGrath
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - A E Milne
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - M Munthali
- The Department of Agricultural Research Services, P.O. Box 30779, Lilongwe 3, Malawi
| | - E Towett
- World Agroforestry (ICRAF), United Nations Avenue, P.O. Box 30677, Nairobi, Kenya
| | - M G Walsh
- Africa Soil Information Service, Selian Agricultural Research Institute, P.O. Box 2704, Arusha, Tanzania
| | - L Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - S D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - M R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK.,Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - R M Lark
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK.,Future Food Beacon, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, LE12 5RD, UK
| | - P C Nalivata
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Bunda College Campus, P.O. Box 219, Lilongwe, Malawi.
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20
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Galani YJH, Ligowe IS, Kieffer M, Kamalongo D, Kambwiri AM, Kuwali P, Thierfelder C, Dougill AJ, Gong YY, Orfila C. Conservation Agriculture Affects Grain and Nutrient Yields of Maize (Zea Mays L.) and Can Impact Food and Nutrition Security in Sub-Saharan Africa. Front Nutr 2022; 8:804663. [PMID: 35155522 PMCID: PMC8826957 DOI: 10.3389/fnut.2021.804663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/21/2021] [Indexed: 11/13/2022] Open
Abstract
Maize is a major staple and plays an essential role in food and nutrition security in Sub-Saharan Africa (SSA). Conservation agriculture (CA), a climate-smart agriculture practise based on minimum soil disturbance, crop residue retention, and crop diversification, has been widely advocated but without extensive research on the impact it may have on maize nutrient composition, and food and nutrition security. This study assessed the grain yield, macro- and micronutrient mineral content, and nutrient yield of eight maize varieties grown in Malawi, and how these are affected by CA practises over two seasons. The minerals were analysed by inductively coupled plasma (ICP) coupled to optical emission spectroscopy (OES) and to mass spectroscopy (MS). Grain yield and Se content differed among the varieties, while C, N, Fe, K, Mg, Mn, P, and Zn were similar. The local variety Kanjerenjere showed lowest grain and nutrient yields. The open-pollinated varieties (OPVs) concentrated more minerals than the F1 hybrids, but the latter showed higher yields for both grain and nutrients. Typical consumption of the eight maize varieties could fully meet the protein and Mg dietary reference intake (DRIs) of Malawian children (1–3 years), as well as Mg and Mn needs of adult women (19–50 years), but their contribution to dietary requirements was low for Fe (39–41%) and K (13–21%). The trials showed that CA increased grain yield (1.2- to 1.8-fold) and Se content (1.1- to 1.7-fold), but that it had no effect on C, K, Mg, P, and Zn, and that N (1.1- to 1.2-fold), Mn (1.1- to 1.8-fold), and Fe (1.3- to 3.4-fold) were reduced. The high increase in grain yield under CA treatments resulted in increased yields of protein and Se, no effect on the yields of K, Mg, Mn, P, Zn, and reduced Fe yield. Conservation agriculture could contribute in reducing the risk of Se deficiency in Malawian women and children but exacerbates the risk of Fe deficiency. A combination of strategies will be needed to mitigate some of the foreseen effects of climate change on agriculture, and food and nutrition security, and improve nutrient intake.
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Affiliation(s)
- Yamdeu Joseph Hubert Galani
- School of Food Science and Nutrition, Faculty of Environment, University of Leeds, Leeds, United Kingdom
- *Correspondence: Yamdeu Joseph Hubert Galani
| | - Ivy S. Ligowe
- Chitedze Agricultural Research Station, Lilongwe, Malawi
| | - Martin Kieffer
- Centre for Plant Sciences, University of Leeds, Leeds, United Kingdom
| | | | - Alfred Mexon Kambwiri
- Centre for Environmental Policy and Advocacy, Blantyre, Malawi
- Civil Society Agriculture Network, Lilongwe, Malawi
| | | | | | - Andrew J. Dougill
- School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, United Kingdom
| | - Yun Yun Gong
- School of Food Science and Nutrition, Faculty of Environment, University of Leeds, Leeds, United Kingdom
| | - Caroline Orfila
- School of Food Science and Nutrition, Faculty of Environment, University of Leeds, Leeds, United Kingdom
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21
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Joy EJM, Kalimbira AA, Sturgess J, Banda L, Chiutsi-Phiri G, Manase H, Gondwe J, Ferguson EL, Kalumikiza Z, Bailey EH, Young SD, Matandika L, Mfutso-Bengo J, Millar K, Niksic M, Segovia de la Revilla L, Likoswe BH, Phuka JC, Phiri FP, Lark RM, Gashu D, Langley-Evans SC, Ander EL, Lowe NM, Dangour AD, Nalivata PC, Broadley MR, Allen E. Biofortified Maize Improves Selenium Status of Women and Children in a Rural Community in Malawi: Results of the Addressing Hidden Hunger With Agronomy Randomized Controlled Trial. Front Nutr 2022; 8:788096. [PMID: 35071297 PMCID: PMC8770811 DOI: 10.3389/fnut.2021.788096] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 12/07/2021] [Indexed: 01/18/2023] Open
Abstract
Background: Selenium deficiency is widespread in the Malawi population. The selenium concentration in maize, the staple food crop of Malawi, can be increased by applying selenium-enriched fertilizers. It is unknown whether this strategy, called agronomic biofortification, is effective at alleviating selenium deficiency. Objectives: The aim of the Addressing Hidden Hunger with Agronomy (AHHA) trial was to determine whether consumption of maize flour, agronomically-biofortified with selenium, affected the serum selenium concentrations of women, and children in a rural community setting. Design: An individually-randomized, double-blind placebo-controlled trial was conducted in rural Malawi. Participants were randomly allocated in a 1:1 ratio to receive either intervention maize flour biofortified with selenium through application of selenium fertilizer, or control maize flour not biofortified with selenium. Participant households received enough flour to meet the typical consumption of all household members (330 g capita -1 day-1) for a period of 8 weeks. Baseline and endline serum selenium concentration (the primary outcome) was measured by inductively coupled plasma mass spectrometry (ICP-MS). Results: One woman of reproductive age (WRA) and one school-aged child (SAC) from each of 180 households were recruited and households were randomized to each group. The baseline demographic and socioeconomic status of participants were well-balanced between arms. No serious adverse events were reported. In the intervention arm, mean (standard deviation) serum selenium concentration increased over the intervention period from 57.6 (17.0) μg L-1 (n = 88) to 107.9 (16.4) μg L-1 (n = 88) among WRA and from 46.4 (14.8) μg L-1 (n = 86) to 97.1 (16.0) μg L-1 (n = 88) among SAC. There was no evidence of change in serum selenium concentration in the control groups. Conclusion: Consumption of maize flour biofortified through application of selenium-enriched fertilizer increased selenium status in this community providing strong proof of principle that agronomic biofortification could be an effective approach to address selenium deficiency in Malawi and similar settings. Clinical Trial Registration: http://www.isrctn.com/ISRCTN85899451, identifier: ISRCTN85899451.
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Affiliation(s)
- Edward J M Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Alexander A Kalimbira
- Bunda College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Joanna Sturgess
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Leonard Banda
- Bunda College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Gabriella Chiutsi-Phiri
- Natural Resources College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Hastings Manase
- Bunda College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Jellita Gondwe
- National Nutrition Reference Lab, Community Health Sciences Unit, Public Health Institute of Malawi, Lilongwe, Malawi
| | - Elaine L Ferguson
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Zione Kalumikiza
- Bunda College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Elizabeth H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Scott D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Limbanazo Matandika
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Joseph Mfutso-Bengo
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Kate Millar
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Maja Niksic
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Lucia Segovia de la Revilla
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Blessings H Likoswe
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - John C Phuka
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Felix P Phiri
- Department of Nutrition, HIV and AIDS, Ministry of Health, Lilongwe, Malawi
| | - R Murray Lark
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Dawd Gashu
- Center for Food Science and Nutrition, Addis Ababa University, Addis Ababa, Ethiopia
| | - Simon C Langley-Evans
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - E Louise Ander
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, United Kingdom
| | - Nicola M Lowe
- UCLan Research Centre for Global Development, University of Central Lancashire, Preston, United Kingdom
| | - Alan D Dangour
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Patson C Nalivata
- Bunda College, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Martin R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
- Rothamsted Research, Harpenden, United Kingdom
| | - Elizabeth Allen
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
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22
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Boorboori MR, Li Z, Yan X, Dan M, Zhang Z, Lin W, Fang C. Comparison of Silicon-Evoked Responses on Arsenic Stress between Different Dular Rice Genotypes. PLANTS 2021; 10:plants10102210. [PMID: 34686019 PMCID: PMC8541284 DOI: 10.3390/plants10102210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 11/28/2022]
Abstract
Arsenic is one of the most hazardous metalloids in nature, and due to its high water solubility, it is one of the most important causes of pollution. However, silicon reduces the uptake and transport of arsenic in rice. This study investigates the interaction of different arsenic and silicon levels on dry weight, protein content, and concentrations of arsenic and silicon in two different rice shoots and roots of Dular wild-type (DU-WT) and Dular Lsi1-overexpressed (DU-OE) rice. It should be noted that all seedlings were subjected to four different treatments. For RNA-seq and qPCR, the DU-WT genotype was selected as the control and DU-OE as the treatment. With the addition of silicone treatment, dry weight and protein content in the shoots and roots of both rice lines were increased, while the concentration of arsenic in these two organs was decreased. When seedlings were exposed to arsenic treatments, protein content, silicon concentration, and dry weight were decreased in both roots and shoots, while arsenic concentration was increased in both rice genotypes. The RNA-seq in DU-OE showed 5823 differentially expressed genes (DEGs), of which 2604 were up-regulated and 3219 down-regulated. Treatment of rice by arsenic and silicon has changed the expression of genes encoding cytokinin-responsive GATA transcription factor 1, protein IN2-1 homolog B, calcium-binding EGF domain-containing protein, Os01g0369700 protein, probable glutathione S-transferase GSTU1, glutathione S-transferase protein, Os09g0367700 protein, isocitrate dehydrogenase (NADP), and Os08g0522400 protein in the root of DU-OE. The present study’s findings showed that in the presence of silicon, the transgenic genotype is much more resistant to arsenic than the wild genotype of Dular rice.
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23
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Ishfaq M, Wakeel A, Shahzad MN, Kiran A, Li X. Severity of zinc and iron malnutrition linked to low intake through a staple crop: a case study in east-central Pakistan. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:4219-4233. [PMID: 33830390 DOI: 10.1007/s10653-021-00912-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/26/2021] [Indexed: 05/24/2023]
Abstract
Micronutrients deficiency in soil-plant and human is well-addressed; however, little is known about their spatial distribution, magnitude of deficiency and biological nexus. Zinc deficiency (ZnD) and iron-deficiency anemia (FeD) are two serious nutritional concerns which are negatively affecting human health. Herein, a survey-based case study was conducted in major wheat-based cropping system of east-central Pakistan. Soil and grain samples were collected from 125 field-grown wheat from 25 distinct sites/villages and GPS coordinates were taken for mapping. The collected samples were tags according to the names of 25 sites, i.e., UCs (union councils; an administrative unit). The quantified amount of zinc (Zn) or iron (Fe) in soil-wheat grains was compared with their recommended concentrations (RCZn, RCFe) for human nutrition. Additionally, clinical features of ZnD and FeD were diagnosed among local farmers who used to consume these grains, throughout the year, cultivated on their farm, and quantified their deficiency prevalence (ZnDP, FeDP). Results revealed, the collected 64% (0.54 to 5.25 mg kg-1) soils, and 96% (1.4 to 31 mg kg-1) grain samples are Zn-deficient (RCZn) along with ZnDP recorded among 68% of population. Meanwhile, FeD is quantified in 76% (1.86 to 15 mg kg-1) soil, 72% grain (2.1 to 134 mg kg-1) samples, and FeDP is found among 84% of studied population. A strong and positive correlation is developed in the Zn-or FeDP with their deficiencies in soil and grain by plotting multivariate analysis. In line with spatial distribution pattern, the UCs, namely, 141, 151, 159 and 132 are quantified severe deficient in Zn and Fe, and others are marginal or approaching to deficient level. Our findings rationalize the biological nexus of Zn and Fe, and accordingly, draw attention in the biofortification of staple crop as a win-win approach to combat the rising malnutrition concerns.
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Affiliation(s)
- Muhammad Ishfaq
- Department of Plant Nutrition, The Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China.
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan.
| | - Abdul Wakeel
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Muhammad Nadeem Shahzad
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Aysha Kiran
- Department of Botany, University of Agriculture, Faisalabad, 38040, Pakistan.
| | - Xuexian Li
- Department of Plant Nutrition, The Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
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24
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Tang K, Adams KP, Ferguson EL, Woldt M, Kalimbira AA, Likoswe B, Yourkavitch J, Chrisinger B, Pedersen S, Segovia De La Revilla L, Dary O, Ander EL, Joy EJM. Modeling food fortification contributions to micronutrient requirements in Malawi using Household Consumption and Expenditure Surveys. Ann N Y Acad Sci 2021; 1508:105-122. [PMID: 34580873 PMCID: PMC9291765 DOI: 10.1111/nyas.14697] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/20/2021] [Accepted: 08/29/2021] [Indexed: 01/20/2023]
Abstract
Large-scale food fortification may be a cost-effective intervention to increase micronutrient supplies in the food system when implemented under appropriate conditions, yet it is unclear if current strategies can equitably benefit populations with the greatest micronutrient needs. This study developed a mathematical modeling framework for comparing fortification scenarios across different contexts. It was applied to model the potential contributions of three fortification vehicles (oil, sugar, and wheat flour) toward meeting dietary micronutrient requirements in Malawi through secondary data analyses of a Household Consumption and Expenditure Survey. We estimated fortification vehicle coverage, micronutrient density of the diet, and apparent intake of nonpregnant, nonlactating women for nine different micronutrients, under three food fortification scenarios and stratified by subpopulations across seasons. Oil and sugar had high coverage and apparent consumption that, when combined, were predicted to improve the vitamin A adequacy of the diet. Wheat flour contributed little to estimated dietary micronutrient supplies due to low apparent consumption. Potential contributions of all fortification vehicles were low in rural populations of the lowest socioeconomic position. While the model predicted large-scale food fortification would contribute to reducing vitamin A inadequacies, other interventions are necessary to meet other micronutrient requirements, especially for the rural poor.
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Affiliation(s)
- Kevin Tang
- Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom.,USAID Advancing Nutrition, Arlington, Virginia
| | - Katherine P Adams
- Institute for Global Nutrition, University of California, Davis, Davis, California
| | - Elaine L Ferguson
- Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Monica Woldt
- USAID Advancing Nutrition, Arlington, Virginia.,Helen Keller International, Washington, DC
| | - Alexander A Kalimbira
- Department of Human Nutrition and Health, Faculty of Food and Human Sciences, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
| | - Blessings Likoswe
- Department of Public Health, School of Public Health and Family Medicine, University of Malawi, Chichiri, Malawi
| | - Jennifer Yourkavitch
- USAID Advancing Nutrition, Arlington, Virginia.,Results for Development, Washington, DC
| | - Benjamin Chrisinger
- Department of Social Policy and Intervention, University of Oxford, Oxford, United Kingdom
| | - Sarah Pedersen
- USAID, Bureau for Resilience and Food Security, Washington, DC
| | | | - Omar Dary
- USAID, Bureau for Global Health, Washington, DC
| | - E Louise Ander
- School of Biosciences, University of Nottingham, Loughborough, United Kingdom.,Centre for Environmental Geochemistry, British Geological Survey, Keyworth, United Kingdom
| | - Edward J M Joy
- Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
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25
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Kaninga B, Lark RM, Chishala BH, Maseka KK, Sakala GM, Young SD, Tye A, Hamilton EM, Watts MJ. Crop uptake of heavy metals in response to the environment and agronomic practices on land near mine tailings in the Zambian Copperbelt Province. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:3699-3713. [PMID: 33751307 DOI: 10.1007/s10653-021-00849-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
A field experiment was undertaken on farmers' fields adjacent to a large mine tailings dam in the Zambian mining town of Kitwe. Experimental plots were located close to the tailings (≤ 200 m) or further away (300-400 m) within the demarcated land farmed by the same community. This study evaluated the uptake of Cd, Cu, Ni, Pb and Zn by pumpkin leaves and maize grown in soil amended with lime and manure applied at agronomic rates, and the subsequent risk of dietary exposure to the local community, typical of many similar situations across the Zambian Copperbelt. Treatments, combinations of lime and manure (present or absent), were applied to subplots selected independently and randomly within each main plot, which represented variable geochemistry across this study site as a result of windblown/rain-driven dust from the tailings. Total elemental concentrations in crops were determined by ICP-MS following microwave-assisted acid digestion. Concentrations of Cu and Pb in pumpkin leaves were above the prescribed FAO/WHO safe limits by 60-205% and by 33-133%, respectively, while all five metals were below the limit for maize grain. Concentration of metals in maize grain was not affected by the amendments. However, lime at typical agronomic application rates significantly reduced concentrations of Cd, Cu, Pb and Zn in the pumpkin leaves by 40%, 33%, 19% and 10%, respectively, and for manure Cd reduced by 16%, while Zn increased by 35%. The uptake of metals by crops in locations further from the tailings was greater than closer to the tailings because of greater retention of metals in the soil at higher soil pH closer to the tailings. Crops in season 2 had greater concentrations of Cu, Ni, Pb and Zn than in season 1 due to diminished lime applied only in season 1, in line with common applications on a biannual basis. Maize as the staple crop is safe to grow in this area while pumpkin leaves as a readily available commonly consumed leafy vegetable may present a hazard due to accumulation of Cu and Pb above recommended safe limits.
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Affiliation(s)
- Belinda Kaninga
- Zambia Agriculture Research Institute, Mount Makulu Central Research Station, P/B 7, Chilanga, Lusaka, Zambia.
- School of Agricultural Sciences, University of Zambia, Great East Road Campus, P.O Box 32379, Lusaka, Zambia.
| | - R Murray Lark
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK
| | - Benson H Chishala
- School of Agricultural Sciences, University of Zambia, Great East Road Campus, P.O Box 32379, Lusaka, Zambia
| | - Kakoma K Maseka
- Copperbelt University, Jambo Drive, Riverside, P.O. Box 21692, Kitwe, Zambia
| | - Godfrey M Sakala
- Zambia Agriculture Research Institute, Mount Makulu Central Research Station, P/B 7, Chilanga, Lusaka, Zambia
| | - Scott D Young
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire, LE12 5RD, UK
| | - Andrew Tye
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK
| | - Elliott M Hamilton
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK
| | - Michael J Watts
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK
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26
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Speich C, Brittenham GM, Cercamondi CI, Zeder C, Nkosi-Gondwe T, Phiri KS, Moretti D, Zimmermann MB. Isotopic measurement of iron requirements in sub-Saharan African children. Am J Clin Nutr 2021; 114:986-996. [PMID: 34113969 DOI: 10.1093/ajcn/nqab161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 04/19/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Prevention of iron deficiency in African children is a public health priority. Current WHO/FAO estimations of iron requirements are derived from factorial estimates based on healthy, iron-sufficient "model" children using data derived mainly from adults. OBJECTIVES In this study, we aimed to quantify iron absorption, loss, and balance in apparently healthy 5- to 7-y-old children living in rural Africa. METHODS We directly measured long-term iron absorption and iron loss in a 2-y observational study in Malawian children (n = 48) using a novel stable iron isotope method. RESULTS Of the 36 children with height-for-age and weight-for-age z scores ≥-2, 13 (36%) were iron deficient (soluble transferrin receptor >8.3 mg/L) and 23 were iron sufficient. Iron-deficient children weighed more than iron-sufficient children [mean difference (95% CI): +2.1 (1.4, 2.7) kg; P = 0.01]. Mean iron losses did not differ significantly between iron-deficient and iron-sufficient children and were comparable to WHO/FAO median estimates of 19 µg/(d × kg). In iron-sufficient children, median (95% CI) dietary iron absorption was 32 (28, 34) µg/(d × kg), comparable to WHO/FAO-estimated median requirements of 32 µg/(d × kg). In iron-deficient children, absorption of 28 (25, 30) µg/(d × kg) was not increased to correct their iron deficit, likely because of a lack of bioavailable dietary iron. Twelve children (25%) were undernourished (underweight, stunted, or both). CONCLUSIONS Our results suggest that WHO/FAO iron requirements are adequate for healthy iron-sufficient children in this rural area of Malawi, but iron-deficient children require additional bioavailable iron to correct their iron deficit.
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Affiliation(s)
- Cornelia Speich
- Laboratory of Human Nutrition, Institute of Food, Nutrition and Health, ETH Zürich, Zurich, Switzerland
| | - Gary M Brittenham
- Department of Pediatrics, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Colin I Cercamondi
- Laboratory of Human Nutrition, Institute of Food, Nutrition and Health, ETH Zürich, Zurich, Switzerland
| | - Christophe Zeder
- Laboratory of Human Nutrition, Institute of Food, Nutrition and Health, ETH Zürich, Zurich, Switzerland
| | - Thandile Nkosi-Gondwe
- Training and Research Unit of Excellence, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Kamija S Phiri
- Training and Research Unit of Excellence, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Diego Moretti
- Laboratory of Human Nutrition, Institute of Food, Nutrition and Health, ETH Zürich, Zurich, Switzerland.,Nutrition Group, Health Department, Swiss Distance University of Applied Sciences, Regensdorf, Switzerland
| | - Michael B Zimmermann
- Laboratory of Human Nutrition, Institute of Food, Nutrition and Health, ETH Zürich, Zurich, Switzerland
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27
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Ahmad S, Bailey EH, Arshad M, Ahmed S, Watts MJ, Young SD. Fate of selenium in biofortification of wheat on calcareous soil: an isotopic study. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:3643-3657. [PMID: 33634392 PMCID: PMC8405469 DOI: 10.1007/s10653-021-00841-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
Selenium (Se) biofortification of staple cereal crops can improve the Se nutritional status of populations. A field trial employing an enriched stable isotope of Se (77Se) was undertaken over three consecutive cropping seasons in a coarse-textured, calcareous soil in Gilgit-Baltistan, Pakistan. The objectives were to (1) assess the feasibility and efficiency of Se biofortification, (2) determine the fate of residual Se, and (3) assess the consequences for dietary Se intake. Isotopically enriched 77Se (77SeFert) was applied, either as selenate or as selenite, at three levels (0, 10, and 20 g ha-1) to a wheat crop. Residual 77SeFert availability was assessed in subsequent crops of maize and wheat without further 77SeFert addition. Loss of 77SeFert was c.35% by the first (wheat) harvest, for both selenium species, attributable to the practice of flood irrigation and low adsorption capacity of the soil. No 77SeFert was detectable in subsequent maize or wheat crops. The remaining 77SeFert in soil was almost entirely organically bound and diminished with time following a reversible (pseudo-)first-order trend. Thus, repeat applications of Se would be required to adequately biofortify grain each year. In contrast to native soil Se, there was no transfer of 77SeFert to a recalcitrant form. Grain from control plots would provide only 0.5 µg person-1 day-1 of Se. By contrast, a single application of 20 g ha-1 SeVI could provide c. 47 µg person-1 day-1 Se in wheat, sufficient to avoid deficiency when combined with dietary Se intake from other sources (c. 25 µg day-1).
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Affiliation(s)
- Saeed Ahmad
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Elizabeth H Bailey
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK.
| | - Muhammad Arshad
- Pakistan Agricultural Research Council - Mountain Agricultural Research Centre, Gilgit-Baltistan, Pakistan
| | - Sher Ahmed
- Pakistan Agricultural Research Council - Mountain Agricultural Research Centre, Gilgit-Baltistan, Pakistan
| | - Michael J Watts
- British Geological Survey, Centre for Environmental Geochemistry, Inorganic Geochemistry, Nottingham, NG12 5GG, UK
| | - Scott D Young
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
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28
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Knez M, Stangoulis JCR. Calcium Biofortification of Crops-Challenges and Projected Benefits. FRONTIERS IN PLANT SCIENCE 2021; 12:669053. [PMID: 34335646 PMCID: PMC8323714 DOI: 10.3389/fpls.2021.669053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Despite Calcium (Ca) being an essential nutrient for humans, deficiency of Ca is becoming an ensuing public health problem worldwide. Breeding staple crops with higher Ca concentrations is a sustainable long-term strategy for alleviating Ca deficiency, and particular criteria for a successful breeding initiative need to be in place. This paper discusses current challenges and projected benefits of Ca-biofortified crops. The most important features of Ca nutrition in plants are presented along with explicit recommendations for additional exploration of this important issue. In order for Ca-biofortified crops to be successfully developed, tested, and effectively implemented in most vulnerable populations, further research is required.
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Affiliation(s)
- Marija Knez
- College of Science and Engineering, Flinders University, Adelaide, SA, Australia
- Centre of Research Excellence in Nutrition and Metabolism, National Institute for Medical Research, University of Belgrade, Belgrade, Serbia
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29
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Liu T, Liu X, Zhou R, Chen H, Zhang H, Zhang B. De novo Transcriptome Assembly and Comparative Analysis Highlight the Primary Mechanism Regulating the Response to Selenium Stimuli in Oats ( Avena sativa L.). FRONTIERS IN PLANT SCIENCE 2021; 12:625520. [PMID: 34220876 PMCID: PMC8249945 DOI: 10.3389/fpls.2021.625520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 05/27/2021] [Indexed: 06/13/2023]
Abstract
Selenium is an essential microelement for humans and animals. The specific processing technique of oats can maximize the preservation of its nutrients. In this study, to understand the genetic response of oats in a high-selenium environment, oats were treated with sodium selenate for 24 h, and transcriptome analysis was performed. A total of 211,485,930 clean reads composing 31.30 Gb of clean data were retained for four samples. After assembly, 186,035 unigenes with an average length of 727 bp were generated, and the N50 length was 1,149 bp. Compared with that in the control group, the expression of 7,226 unigenes in the treatment group was upregulated, and 2,618 unigenes were downregulated. Based on the sulfur assimilation pathway and selenocompound metabolic pathway, a total of 27 unigenes related to selenate metabolism were identified. Among them, the expression of both key genes APS (ATP sulfurylase) and APR (adenosine 5'-phosphosulfate reductase) was upregulated more than 1,000-fold under selenate treatment, while that of CBL (cystathionine-β-synthase) was upregulated 3.12-fold. Based on the transcriptome analysis, we suspect that the high-affinity sulfur transporter Sultr1;2 plays a key role in selenate uptake in oats. A preliminary regulatory mechanism explains the oat response to selenate treatment was ultimately proposed based on the transcriptome analysis and previous research.
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Affiliation(s)
- Tao Liu
- Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, China
- University of Chinese Academy of Sciences, Beijing, China
| | | | - Rangrang Zhou
- Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Hong Chen
- Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Huaigang Zhang
- Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Bo Zhang
- Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, China
- University of Chinese Academy of Sciences, Beijing, China
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30
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Gashu D, Nalivata PC, Amede T, Ander EL, Bailey EH, Botoman L, Chagumaira C, Gameda S, Haefele SM, Hailu K, Joy EJM, Kalimbira AA, Kumssa DB, Lark RM, Ligowe IS, McGrath SP, Milne AE, Mossa AW, Munthali M, Towett EK, Walsh MG, Wilson L, Young SD, Broadley MR. The nutritional quality of cereals varies geospatially in Ethiopia and Malawi. Nature 2021; 594:71-76. [PMID: 34012114 PMCID: PMC8172382 DOI: 10.1038/s41586-021-03559-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 04/15/2021] [Indexed: 02/04/2023]
Abstract
Micronutrient deficiencies (MNDs) remain widespread among people in sub-Saharan Africa1-5, where access to sufficient food from plant and animal sources that is rich in micronutrients (vitamins and minerals) is limited due to socioeconomic and geographical reasons4-6. Here we report the micronutrient composition (calcium, iron, selenium and zinc) of staple cereal grains for most of the cereal production areas in Ethiopia and Malawi. We show that there is geospatial variation in the composition of micronutrients that is nutritionally important at subnational scales. Soil and environmental covariates of grain micronutrient concentrations included soil pH, soil organic matter, temperature, rainfall and topography, which were specific to micronutrient and crop type. For rural households consuming locally sourced food-including many smallholder farming communities-the location of residence can be the largest influencing factor in determining the dietary intake of micronutrients from cereals. Positive relationships between the concentration of selenium in grain and biomarkers of selenium dietary status occur in both countries. Surveillance of MNDs on the basis of biomarkers of status and dietary intakes from national- and regional-scale food-composition data1-7 could be improved using subnational data on the composition of grain micronutrients. Beyond dietary diversification, interventions to alleviate MNDs, such as food fortification8,9 and biofortification to increase the micronutrient concentrations in crops10,11, should account for geographical effects that can be larger in magnitude than intervention outcomes.
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Affiliation(s)
- D Gashu
- Centre for Food Science and Nutrition, Addis Ababa University, Addis Ababa, Ethiopia
| | - P C Nalivata
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Lilongwe, Malawi
| | - T Amede
- International Crop Research Institute for the Semi-Arid Tropics (ICRISAT), Addis Ababa, Ethiopia
| | - E L Ander
- Centre for Environmental Geochemistry, British Geological Survey, Keyworth, UK
| | - E H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
| | - L Botoman
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Lilongwe, Malawi
- The Department of Agricultural Research Services, Lilongwe, Malawi
| | - C Chagumaira
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Lilongwe, Malawi
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
- Future Food Beacon, University of Nottingham, Sutton Bonington, UK
- Sustainable Agriculture Sciences Department, Rothamsted Research, Harpenden, UK
| | - S Gameda
- International Maize and Wheat Improvement Center (CIMMYT), Addis Ababa, Ethiopia
| | - S M Haefele
- Sustainable Agriculture Sciences Department, Rothamsted Research, Harpenden, UK
| | - K Hailu
- Centre for Food Science and Nutrition, Addis Ababa University, Addis Ababa, Ethiopia
- Department of Food Science and Applied Nutrition, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
| | - E J M Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - A A Kalimbira
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Lilongwe, Malawi
| | - D B Kumssa
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
| | - R M Lark
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
- Future Food Beacon, University of Nottingham, Sutton Bonington, UK
| | - I S Ligowe
- Lilongwe University of Agriculture and Natural Resources (LUANAR), Lilongwe, Malawi
- The Department of Agricultural Research Services, Lilongwe, Malawi
| | - S P McGrath
- Sustainable Agriculture Sciences Department, Rothamsted Research, Harpenden, UK
| | - A E Milne
- Sustainable Agriculture Sciences Department, Rothamsted Research, Harpenden, UK
| | - A W Mossa
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
| | - M Munthali
- The Department of Agricultural Research Services, Lilongwe, Malawi
| | - E K Towett
- World Agroforestry (ICRAF), Nairobi, Kenya
| | - M G Walsh
- Africa Soil Information Service, Selian Agricultural Research Institute, Arusha, Tanzania
| | - L Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
| | - S D Young
- School of Biosciences, University of Nottingham, Sutton Bonington, UK
| | - M R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington, UK.
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31
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Selenium speciation and bioaccessibility in Se-fertilised crops of dietary importance in Malawi. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103841] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Bevis LE, Hestrin R. Widespread heterogeneity in staple crop mineral concentration in Uganda partially driven by soil characteristics. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:1867-1889. [PMID: 33165803 DOI: 10.1007/s10653-020-00698-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 08/12/2020] [Indexed: 05/07/2023]
Abstract
Calcium (Ca), iron (Fe), selenium (Se), and zinc (Zn) deficiencies are widespread in sub-Saharan Africa, with severe implications for human health. In Uganda, where the predominant diet depends heavily on plant-based staples, crop mineral concentration is an important component of dietary mineral intake. Studies assessing the risk of nutrient deficiency or the effectiveness of nutrient-focused interventions often estimate dietary mineral intake using food composition tables that are based on crops grown in developed countries. However, little is known about the actual nutritional content of crops grown in Uganda. Here, we document the Ca, Fe, Se, and Zn concentration of staple crops collected from Ugandan household farms. While median mineral concentrations were similar to those reported previously, variation in crop mineral concentration was high, particularly for Fe and Se. An ordinary least squares regression showed that some soil characteristics were correlated with crop mineral concentrations. Of these, soil pH was often positively associated with crop mineral concentration, while sand and organic carbon concentrations were negatively associated with several crop mineral concentrations. However, much of the variation in crop mineral content was not associated with the soil characteristics measured. Overall, our results suggest that extensive heterogeneity in staple crop mineral concentration in Uganda is likely due to a combination of edaphic characteristics and other variables. Because staple foods constitute a large portion of dietary mineral intake in Uganda and other developing countries, these results have implications for estimates of dietary mineral intake and the development of effective intervention strategies in such regions.
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Affiliation(s)
- Leah Em Bevis
- Department of Agricultural, Environmental and Development Economics, The Ohio State University, Columbus, OH, USA.
| | - Rachel Hestrin
- Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA
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33
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Webster AB, Rossouw R, Callealta FJ, Bennett NC, Ganswindt A. Assessment of trace element concentrations in sediment and vegetation of mesic and arid African savannahs as indicators of ecosystem health. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 760:143358. [PMID: 33187707 DOI: 10.1016/j.scitotenv.2020.143358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
The savannah biome supports unique biodiversity and provides a multitude of ecosystem services. Defining background concentrations for trace elements in the environment is beneficial for the determination of nutrient deficiencies/hotspots and for the management of pollution. Sediment and corresponding vegetation samples were collected around 48 surface water points in two savannah wildlife areas for assessment and comparison of 20 trace elements using ICP-MS. Site-specific and matrix-specific differences were evident for essential B, Co, Cu, Fe, Mn, Mo, Ni, Se and Zn, potentially toxic As, Cd, Cr, Hg, Pb and V and additional elements Al, Ba, Sb, Sn and Sr analysed. Sediment and vegetation from all sampled locations at both sites contained single or multiple potentially toxic elements at various concentrations. Although the presence of all elements can be linked to underlying geology and geochemistry specific to each site, evidence of anthropogenic cause was also evident at both sites. This paper covers the widest range of trace elements assessed in protected terrestrial wildlife reserves in the South African savannah biome to date and highlights the potential for deleterious consequences of trace element contamination of the environment.
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Affiliation(s)
- Andrea B Webster
- Mammal Research Institute, Department of Zoology and Entomology, Cnr Lynwood and University Roads, University of Pretoria, 0083, South Africa.
| | - Riana Rossouw
- Central Analytical Facilities, ICP-MS Laboratory, Cnr Ryneveld & Merriman Street, University of Stellenbosch, South Africa, 7600
| | - F Javier Callealta
- Department of Economics, Universidad de Alcalá, Plaza Victoria, 2, Alcalá de Henares 28802, Spain
| | - Nigel C Bennett
- Mammal Research Institute, Department of Zoology and Entomology, Cnr Lynwood and University Roads, University of Pretoria, 0083, South Africa
| | - Andre Ganswindt
- Mammal Research Institute, Department of Zoology and Entomology, Cnr Lynwood and University Roads, University of Pretoria, 0083, South Africa
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34
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Ligowe IS, Bailey EH, Young SD, Ander EL, Kabambe V, Chilimba AD, Lark RM, Nalivata PC. Agronomic iodine biofortification of leafy vegetables grown in Vertisols, Oxisols and Alfisols. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:361-374. [PMID: 32965604 DOI: 10.1016/j.geoderma.2019.114106] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 08/31/2020] [Indexed: 05/19/2023]
Abstract
Iodine deficiency disorders (IDD) in sub-Saharan African countries are related to low dietary I intake and generally combatted through salt iodisation. Agronomic biofortification of food crops may be an alternative approach. This study assessed the effectiveness of I biofortification of green vegetables (Brassica napus L and Amaranthus retroflexus L.) grown in tropical soils with contrasting chemistry and fertility. Application rates of 0, 5 and 10 kg ha-1 I applied to foliage or soil were assessed. Leaves were harvested fortnightly for ~ 2 months after I application before a second crop was grown to assess the availability of residual soil I. A separate experiment was used to investigate storage of I within the plants. Iodine concentration and uptake in sequential harvests showed a sharp drop within 28 days of I application in all soil types for all I application levels and methods. This rapid decline likely reflects I fixation in the soil. Iodine biofortification increased I uptake and concentration in the vegetables to a level useful for increasing dietary I intake and could be a feasible way to reduce IDD in tropical regions. However, biofortification of green vegetables which are subject to multiple harvests requires repeated I applications.
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Affiliation(s)
- Ivy Sichinga Ligowe
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
- Department of Agricultural Research Services, P.O. Box 30779, Lilongwe 3, Malawi
| | - E H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK.
| | - S D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - E L Ander
- Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK
| | - V Kabambe
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
| | - A D Chilimba
- Department of Agricultural Research Services, P.O. Box 30779, Lilongwe 3, Malawi
| | - R M Lark
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - P C Nalivata
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
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35
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Phiri FP, Ander EL, Lark RM, Joy EJM, Kalimbira AA, Suchdev PS, Gondwe J, Hamilton EM, Watts MJ, Broadley MR. Spatial analysis of urine zinc (Zn) concentration for women of reproductive age and school age children in Malawi. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:259-271. [PMID: 32862269 PMCID: PMC7847879 DOI: 10.1007/s10653-020-00700-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/18/2020] [Indexed: 05/04/2023]
Abstract
Zinc (Zn) is an essential micronutrient, and Zn deficiency remains a major global public health challenge. Recognised biomarkers of population Zn status include blood plasma or serum Zn concentration and proxy data such as dietary Zn intake and prevalence of stunting. Urine Zn concentration is rarely used to assess population Zn status. This study assessed the value of urine Zn concentration as a biomarker of population Zn status using a nationally representative sample of non-pregnant women of reproductive age (WRA) and school-aged children (SAC) in Malawi. Spot (casual) urine samples were collected from 741 WRA and 665 SAC. Urine Zn concentration was measured by inductively coupled plasma mass spectrometry with specific gravity adjustment for hydration status. Data were analysed using a linear mixed model with a spatially correlated random effect for between-cluster variation. The effect of time of sample collection (morning or afternoon), and gender (for SAC), on urine Zn concentration were examined. There was spatial dependence in urine Zn concentration between clusters among SAC but not WRA, which indicates that food system or environmental factors can influence urine Zn concentration. Mapping urine Zn concentration could potentially identify areas where the prevalence of Zn deficiency is greater and thus where further sampling or interventions might be targeted. There was no evidence for differences in urine Zn concentration between gender (P = 0.69) or time of sample collection (P = 0.85) in SAC. Urine Zn concentration was greater in afternoon samples for WRA (P = 0.003). Relationships between urine Zn concentration, serum Zn concentration, dietary Zn intake, and potential food systems covariates warrant further study.
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Affiliation(s)
- Felix P. Phiri
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD UK
- Department of Nutrition, HIV and AIDS, Ministry of Health, P. Bag B401, Lilongwe, Malawi
| | - E. Louise Ander
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG UK
| | - R. Murray Lark
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD UK
| | - Edward J. M. Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT UK
| | - Alexander A. Kalimbira
- Department of Human Nutrition and Health, Faculty of Food and Human Sciences, Bunda Campus, Lilongwe University of Agriculture and Natural Resources, P.O. Box 219, Lilongwe, Malawi
| | - Parminder S. Suchdev
- Department of Pediatrics and Hubert Department of Global Health, Emory University, Atlanta, GA 30322 USA
| | - Jellita Gondwe
- Community Health Sciences Unit, Ministry of Health, Private Bag 65, Lilongwe, Malawi
| | - Elliott M. Hamilton
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG UK
| | - Michael J. Watts
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG UK
| | - Martin R. Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD UK
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36
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Aziz N, Butt A. Enzymatic and non-enzymatic detoxification in Lycosa terrestris and Pardosa birmanica exposed to single and binary mixture of copper and lead. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 80:103500. [PMID: 32950716 DOI: 10.1016/j.etap.2020.103500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/18/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Organisms employ various enzymatic and non-enzymatic detoxification mechanisms to minimize the harmful effects of metal pollution in the terrestrial environment. We examined the effects of copper (Cu), lead (Pb) and their mixture (Cu + Pb) on glutathione (GSH), metallothionein (MTs), cytochrome P450 (CYP 450), carboxylesterase (CarbE), acetylcholinesterase (AchE) and glutathione S-transferase (GST) in Lycosa terrestris and Pardosa birmanica via two exposure routes, i.e., soil and food for 10, 20 and 40 days. The present results revealed that the accumulation of Cu and Pb in both spiders' species increase with exposure duration and depend on the route of exposure and type of metal. The activities of CarbE, GST, and MTs significantly increased with increasing metal body burden for all experimental treatments. The CYP 450 activity exhibited a significant time-dependent decrease with increasing Cu concentration in both species. The AchE activity was significantly inhibited on Pb exposure via soil and Cu + Pb exposure via both routes. The decrease in the level of GSH was measured on Cu + Pb exposure via both routes. Thus, all these enzymatic and non-enzymatic responses are sensitive to the metals tested and could serve as early warning indicators for assessing the effects of metal pollution in these species.
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Affiliation(s)
- Nida Aziz
- Department of Zoology, University of the Punjab, Lahore, Pakistan.
| | - Abida Butt
- Department of Zoology, University of the Punjab, Lahore, Pakistan.
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37
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Zia MH, Ahmed I, Bailey EH, Lark RM, Young SD, Lowe NM, Joy EJM, Wilson L, Zaman M, Broadley MR. Site-Specific Factors Influence the Field Performance of a Zn-Biofortified Wheat Variety. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020; 4. [DOI: 10.3389/fsufs.2020.00135] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024] Open
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38
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Kruger J, Taylor JRN, Ferruzzi MG, Debelo H. What is food-to-food fortification? A working definition and framework for evaluation of efficiency and implementation of best practices. Compr Rev Food Sci Food Saf 2020; 19:3618-3658. [PMID: 33337067 DOI: 10.1111/1541-4337.12624] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/18/2020] [Accepted: 08/03/2020] [Indexed: 12/30/2022]
Abstract
Food-to-food fortification (FtFF) is an emerging food-based strategy that can complement current strategies in the ongoing fight against micronutrient deficiencies, but it has not been defined or characterized. This review has proposed a working definition of FtFF. Comparison with other main food-based strategies clearly differentiates FtFF as an emerging strategy with the potential to address multiple micronutrient deficiencies simultaneously, with little dietary change required by consumers. A review of literature revealed that despite the limited number of studies (in vitro and in vivo), the diversity of food-based fortificants investigated and some contradictory data, there are promising fortificants, which have the potential to improve the amount of bioavailable iron, zinc, and provitamin A from starchy staple foods. These fortificants are typically fruits and vegetables, with high mineral as well as ascorbic acid and β-carotene contents. However, as the observed improvements in micronutrient bioavailability and status are relatively small, measuring the positive outcomes is more likely to be impactful only if the FtFF products are consumed as regular staples. Considering best practices in implementation of FtFF, raw material authentication and ingredient documentation are critical, especially as the contents of target micronutrients and bioavailability modulators as well as the microbiological quality of the plant-based fortificants can vary substantially. Also, as there are only few developed supply chains for plant-based fortificants, procurement of consistent materials may be problematic. This, however, provides the opportunity for value chain development, which can contribute towards the economic growth of communities, or hybrid approaches that leverage traditional premixes to standardize product micronutrient content.
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Affiliation(s)
- Johanita Kruger
- Institute of Nutritional Sciences, University of Hohenheim, Stuttgart, Germany
| | - John R N Taylor
- Department of Consumer and Food Sciences and Institute for Food, Nutrition and Well-being, University of Pretoria, Pretoria, South Africa
| | - Mario G Ferruzzi
- Plants for Human Health Institute, North Carolina State University, Kannapolis, North Carolina
| | - Hawi Debelo
- Plants for Human Health Institute, North Carolina State University, Kannapolis, North Carolina
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39
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Gashu D, Lark RM, Milne AE, Amede T, Bailey EH, Chagumaira C, Dunham SJ, Gameda S, Kumssa DB, Mossa AW, Walsh MG, Wilson L, Young SD, Ander EL, Broadley MR, Joy EJM, McGrath SP. Spatial prediction of the concentration of selenium (Se) in grain across part of Amhara Region, Ethiopia. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 733:139231. [PMID: 32446063 PMCID: PMC7298608 DOI: 10.1016/j.scitotenv.2020.139231] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/28/2020] [Accepted: 05/03/2020] [Indexed: 05/08/2023]
Abstract
Grain and soil were sampled across a large part of Amhara, Ethiopia in a study motivated by prior evidence of selenium (Se) deficiency in the Region's population. The grain samples (teff, Eragrostis tef, and wheat, Triticum aestivum) were analysed for concentration of Se and the soils were analysed for various properties, including Se concentration measured in different extractants. Predictive models for concentration of Se in the respective grains were developed, and the predicted values, along with observed concentrations in the two grains were represented by a multivariate linear mixed model in which selected covariates, derived from remote sensor observations and a digital elevation model, were included as fixed effects. In all modelling steps the selection of predictors was done using false discovery rate control, to avoid over-fitting, and using an α-investment procedure to maximize the statistical power to detect significant relationships by ordering the tests in a sequence based on scientific understanding of the underlying processes likely to control Se concentration in grain. Cross-validation indicated that uncertainties in the empirical best linear unbiased predictions of the Se concentration in both grains were well-characterized by the prediction error variances obtained from the model. The predictions were displayed as maps, and their uncertainty was characterized by computing the probability that the true concentration of Se in grain would be such that a standard serving would not provide the recommended daily allowance of Se. The spatial variation of grain Se was substantial, concentrations in wheat and teff differed but showed the same broad spatial pattern. Such information could be used to target effective interventions to address Se deficiency, and the general procedure used for mapping could be applied to other micronutrients and crops in similar settings.
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Affiliation(s)
- D Gashu
- Centre for Food Science and Nutrition, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - R M Lark
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK.
| | - A E Milne
- Department of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - T Amede
- International Crop Research Institute for the Semi-Arid Tropics, ILRI Sholla Campus, P.O. Box 5689, Addis Ababa, Ethiopia
| | - E H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - C Chagumaira
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK; Department of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - S J Dunham
- Department of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - S Gameda
- International Maize and Wheat Improvement Center, ILRI Sholla Campus, P.O. Box 5689, Addis Ababa, Ethiopia
| | - D B Kumssa
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - A W Mossa
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - M G Walsh
- Center for International Earth Science Information Network, The Earth Institute, Columbia University, 61 Route 9W, Geoscience Building Suite 201, Palisades, New York 10964, USA
| | - L Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - S D Young
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - E L Ander
- British Geological Survey, Keyworth, Leicestershire NG12 5GG, UK
| | - M R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - E J M Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK
| | - S P McGrath
- Department of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
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40
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Sach F, Yon L, Henley MD, Bedetti A, Buss P, de Boer WF, Dierenfeld ES, Gardner A, Langley-Evans SC, Hamilton E, Lark RM, Prins HHT, Swemmer AM, Watts MJ. Spatial geochemistry influences the home range of elephants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 729:139066. [PMID: 32388134 DOI: 10.1016/j.scitotenv.2020.139066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/22/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
The unique geochemistry surrounding the Palabora Mining Company (PMC) land may act as a micronutrient hotspot, attracting elephants to the area. The PMC produces refined copper and extracts phosphates and other minerals. Understanding the spatial influence of geochemistry on the home range size of African elephants is important for elephant population management and conservation. The home ranges of collared elephants surrounding the PMC were significantly smaller (P = 0.001) than conspecifics in surrounding reserves, suggesting that their resource needs were met within these smaller areas. Environmental samples (soil, water and plants) were analysed from the mine area and along six transects radiating from the mine centre. Tail hair and faecal samples from elephants at the PMC, and conspecifics within the surrounding area were analysed. All samples were analysed for minerals essential to health and potentially toxic elements (PTEs; As, Ca, Cd, Cu, Fe, K, Mg, Mn, Na, P, Pb, Se, U, V and Zn). Results show that the geochemistry at the PMC is different compared to surrounding areas, with significant elevations seen in all analysed minerals and PTEs in soil closer to the mine, thereby drawing the elephants to the area. Additionally significant elevations were seen in elements analysed in water and vegetation samples. Elephant tail hair from elephants at the mine was significantly greater in Cd, whilst Mg, P, Cu, As, Cd, Pb and U concentrations were significantly greater in elephant faecal samples at the mine compared to the non-mine samples. When micronutrient hotspots overlap with human activity (such as mining), this can lead to poor human-elephant coexistence and thus conflict. When managing elephant populations, the influence of mineral provision on elephant movement must be considered. Such detailed resource information can inform conservation efforts for coordinated programmes (UN SDGs 15 and 17) and underpin sustainable economic activity (UN SDG 8, 11 and 12).
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Affiliation(s)
- Fiona Sach
- Centre for Environmental Geochemistry, Inorganic Geochemistry, British Geological Survey, United Kingdom; School of Biosciences, University of Nottingham, United Kingdom.
| | - Lisa Yon
- School of Veterinary Medicine and Science, University of Nottingham, United Kingdom
| | - Michelle D Henley
- Applied Behavioural Ecology and Environmental Research Unit, University of South Africa, South Africa; Elephants Alive, Limpopo, South Africa
| | | | - Peter Buss
- Veterinary Wildlife Services, South African National Parks, South Africa
| | | | - Ellen S Dierenfeld
- Ellen S. Dierenfeld, LLC, Saint Louis, MO 63128, USA; School of Animal, Rural & Environmental Sciences, Nottingham Trent University, United Kingdom
| | - Amanda Gardner
- Centre for Environmental Geochemistry, Inorganic Geochemistry, British Geological Survey, United Kingdom
| | | | - Elliott Hamilton
- Centre for Environmental Geochemistry, Inorganic Geochemistry, British Geological Survey, United Kingdom; School of Biosciences, University of Nottingham, United Kingdom
| | - R Murray Lark
- School of Biosciences, University of Nottingham, United Kingdom
| | | | - Anthony M Swemmer
- South African Environmental Observation Network (SAEON), Phalaborwa, South Africa
| | - Michael J Watts
- Centre for Environmental Geochemistry, Inorganic Geochemistry, British Geological Survey, United Kingdom.
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Zhao H, Wang F, Yang Q. Origin traceability of peanut kernels based on multi-element fingerprinting combined with multivariate data analysis. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:4040-4048. [PMID: 32338375 DOI: 10.1002/jsfa.10449] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Multi-elements have been widely used to identify the geographical origins of various agricultural products. The objective of this study was to investigate the feasibility of identifying the geographical origins of peanut kernels at different regional scales by using the multi-element fingerprinting technique. The concentrations of 20 elements [boron (B), magnesium (Mg), phosphorus (P), potassium (K), calcium (Ca), etc.] were determined in 135 peanut samples from Jilin Province, Jiangsu Province, and Shandong Province of China. Data obtained were processed by one-way analysis of variance (ANOVA), principal components analysis (PCA), k nearest neighbors (k-NN), linear discriminant analysis (LDA), and support vector machine (SVM). RESULTS Peanut kernels from different regions had their own element fingerprints. The k-NN, LDA, and SVM were all suitable to predict peanut kernels according to their grown provinces with the total correct classification rates of 91.2%, 91.1%, and 91.1%, respectively. While SVM was the best to identify different grown cities of peanut kernels with the prediction accuracy of 91.3%, compared to 72.2% and 78.3% for k-NN and LDA, respectively. CONCLUSION It was an effective method to identify producing areas of peanut kernels at different regional scales using multi-element fingerprinting combined with SVM to enhance regional capabilities for quality assurance and control. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Haiyan Zhao
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, P. R. China
| | - Feng Wang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, P. R. China
| | - Qingli Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, P. R. China
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Lyons G, Dean G, Tongaiaba R, Halavatau S, Nakabuta K, Lonalona M, Susumu G. Macro- and Micronutrients from Traditional Food Plants Could Improve Nutrition and Reduce Non-Communicable Diseases of Islanders on Atolls in the South Pacific. PLANTS 2020; 9:plants9080942. [PMID: 32722347 PMCID: PMC7464995 DOI: 10.3390/plants9080942] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 02/07/2023]
Abstract
Pacific Islanders have paid dearly for abandoning traditional diets, with diabetes and other non-communicable diseases (NCD) widespread. Starchy root crops like sweet potato, taro, and cassava are difficult to grow on the potassium-deficient soils of atolls, and high energy, low nutrient imported foods and drinks are popular. Nutritious, leafy food plants adapted to alkaline, salty, coral soils could form part of a food system strategy to reduce NCD rates. This project targeted four atolls south of Tarawa, Kiribati, and was later extended to Tuvalu. Mineral levels in diverse, local leafy food plants were compared to reveal genotype–environment interactions. Food plants varied in ability to accumulate minerals in leaves and in tolerance of mineral-deficient soils. Awareness activities which included agriculture, health, and education officers targeted atoll communities. Agriculture staff grew planting material in nurseries and provided it to farmers. Rejuvenation of abandoned giant swamp taro pits to form diversified nutritious food gardens was encouraged. Factsheets promoted the most suitable species from 24 analyzed, with multiple samples of each. These included Cnidoscolus aconitifolius (chaya), Pseuderanthemum whartonianum (ofenga), Polyscias scutellaria (hedge panax), and Portulaca oleracea (purslane). The promoted plants have been shown in other studies to have anti-NCD effects. Inclusion of the findings in school curricula and practical application in the form of demonstration school food gardens, as well as increased uptake by farmers, are needed. Further research is needed on bioavailability of minerals in plants containing phytates and tannins.
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Affiliation(s)
- Graham Lyons
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, South Australia 5064, Australia
- Correspondence: ; Tel.: +61-8-83136533
| | - Geoff Dean
- Tasmanian Institute of Agriculture, University of Tasmania, Prospect, Tasmania 7250, Australia;
| | - Routan Tongaiaba
- Agriculture and Livestock Division, Ministry of Environment, Lands and Agriculture Development, Tanaea, South Tarawa, Kiribati; (R.T.); (K.N.)
| | | | - Kabuati Nakabuta
- Agriculture and Livestock Division, Ministry of Environment, Lands and Agriculture Development, Tanaea, South Tarawa, Kiribati; (R.T.); (K.N.)
| | - Matio Lonalona
- Department of Agriculture, Ministry of Natural Resources, Energy and Environment, Vaiaku, Funafuti, Tuvalu;
| | - Gibson Susumu
- Gibson Susumu: Sustainable Agriculture Programme, The Pacific Community (SPC), Suva, Fiji;
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Bevis LEM, Hestrin R. Variation in crop zinc concentration influences estimates of dietary Zn inadequacy. PLoS One 2020; 15:e0234770. [PMID: 32645004 PMCID: PMC7347138 DOI: 10.1371/journal.pone.0234770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 06/02/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Zinc (Zn) deficiency is one of the most common micronutrient deficiencies worldwide. Accurate estimates of Zn intake would facilitate the design and implementation of effective nutritional interventions. OBJECTIVE We sought to improve estimates of dietary Zn intake by evaluating staple crop Zn content and dietary Zn consumption by children under the age of 5 in 9 rural districts of Uganda. METHODS We measured the Zn content of 581 crop samples from household farms and 167 crop samples from nearby markets, and administered food frequency questionnaires to the primary caretakers of 237 children. We estimated Zn consumption using 3 sources of crop Zn content: (i) the HarvestPlus food composition table (FCT) for Uganda, (ii) measurements from household crops, and (iii) measurements from market crops. RESULTS The Zn content of staple crops varied widely, resulting in significantly different estimates of dietary Zn intake. 41% of children appeared to be at risk when estimates were based on market-sampled crops, 23% appeared at risk when estimates were based on the HarvestPlus FCT, and 16% appeared at risk when estimates were based on samples from household farms. CONCLUSION The use of FCTs to calculate Zn intake overestimated the risk of dietary inadequacy for children who primarily consumed staple crops that were produced on household farms, but underestimated the risk for children who primarily consumed staple crops that were purchased at market. More information on the Zn content of staple crops in developing countries could lead to more accurate estimates of dietary intake and associated deficiencies.
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Affiliation(s)
- Leah E. M. Bevis
- Department of Agricultural, Environmental and Development Economics, The Ohio State University, Columbus, Ohio, United States of America
| | - Rachel Hestrin
- Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, New York, United States of America
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Boyle EH, King ML, Garcia S, Culver C, Boudreiux J. Contextual Data in IPUMS DHS: Physical and Social Environment Variables linked to the Demographic and Health Surveys. POPULATION AND ENVIRONMENT 2020; 41:529-549. [PMID: 32801411 PMCID: PMC7428161 DOI: 10.1007/s11111-020-00348-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The Demographic and Health Surveys (DHS) are the most important source of comparative information on the health of women and young children in low- and middle-income countries and are well-suited for studies of the relationship between environmental factors and health. However, barriers have limited the use of the DHS for these purposes. IPUMS DHS, an online data dissemination tool, overcomes these barriers, simplifying comparative analyses with DHS. IPUMS DHS recently incorporated environmental variables that can easily be attached to individual or household records, facilitating the use of DHS data for the study of population and environment issues. We provide a brief introduction to IPUMS DHS, describe the current and anticipated environmental variables and how to use them, and provide an example of the novel research possibilities facilitated by this latest IPUMS DHS development. IPUMS-DHS is available free online at dhs.ipums.org.
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Affiliation(s)
- Elizabeth Heger Boyle
- Sociology Department, 909 Social Sciences Building, University of Minnesota, 267 19th Avenue South, Minneapolis, MN 55455; 612-624-3343
| | - Miriam L King
- Institute for Social Research and Data Innovation, University of Minnesota, Minneapolis, MN 55455
| | - Sarah Garcia
- Sociology Department, 909 Social Sciences Building, University of Minnesota, 267 19th Avenue South, Minneapolis, MN 55455
| | - Corey Culver
- Sociology Department, 909 Social Sciences Building, University of Minnesota, 267 19th Avenue South, Minneapolis, MN 55455
| | - Jordan Boudreiux
- Sociology Department, 909 Social Sciences Building, University of Minnesota, 267 19th Avenue South, Minneapolis, MN 55455
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Likoswe BH, Phiri FP, Broadley MR, Joy EJM, Patson N, Maleta KM, Phuka JC. Inflammation Adjustment by Two Methods Decreases the Estimated Prevalence of Zinc Deficiency in Malawi. Nutrients 2020; 12:nu12061563. [PMID: 32471229 PMCID: PMC7352807 DOI: 10.3390/nu12061563] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/14/2020] [Accepted: 05/21/2020] [Indexed: 01/05/2023] Open
Abstract
Serum zinc concentration (SZC) is used widely to assess population-level zinc status. Its concentration decreases during inflammatory responses, which can affect the interpretation of the results. This study aimed to re-estimate the prevalence of zinc deficiency in Malawi based on the 2015–2016 Malawi Micronutrient Survey (MNS) data, by adjusting SZC measures with markers of inflammation. SZC and inflammation data from 2760 participants were analysed. Adjustments were made using: (1) The Internal Correction Factor (ICF) method which used geometric means, and (2) The Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) method, which used linear regression. Mean SZC values increased significantly when adjustments were made by either ICF or BRINDA (p < 0.001). The national prevalence of zinc deficiency decreased from 62% to 59%, after ICF adjustment, and to 52% after BRINDA adjustment. ICF and BRINDA values of SZC were highly correlated (p < 0.001, r = 0.99), but a Bland–Altman plot showed a lack of agreement between the two methods (bias of 2.07 µg/dL). There was no association between the adjusted SZC and stunting, which is a proxy indicator for zinc deficiency. Inflammation adjustment of SZC, using ICF or BRINDA, produces lower estimates of zinc deficiency prevalence, but the lack of agreement between the adjustment methods warrants further research. Furthermore, the lack of association between SZC and stunting highlights the need to explore other biomarkers and proxies of population zinc assessment. This study demonstrates the importance of considering inflammatory confounders when reporting SZC, to ensure accuracy and to support policy decision making.
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Affiliation(s)
- Blessings H. Likoswe
- Department of Public Health, School of Public Health and Family Medicine, College of Medicine, University of Malawi, Private Bag 360, Chichiri, Blantyre 3, Malawi; (N.P.); (K.M.M.)
- Correspondence: (B.H.L.); (J.C.P.); Tel.: +265-881-131-422/993-226-040 (J.C.P.)
| | - Felix P. Phiri
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; (F.P.P.); (M.R.B.)
- Department of Nutrition, HIV, and AIDS, Ministry of Health, Lilongwe 3, Malawi
| | - Martin R. Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; (F.P.P.); (M.R.B.)
| | - Edward J. M. Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK;
| | - Noel Patson
- Department of Public Health, School of Public Health and Family Medicine, College of Medicine, University of Malawi, Private Bag 360, Chichiri, Blantyre 3, Malawi; (N.P.); (K.M.M.)
- School of Public Health, University of the Witwatersrand, Johannesburg 2193, South Africa
| | - Kenneth M. Maleta
- Department of Public Health, School of Public Health and Family Medicine, College of Medicine, University of Malawi, Private Bag 360, Chichiri, Blantyre 3, Malawi; (N.P.); (K.M.M.)
| | - John C. Phuka
- Department of Public Health, School of Public Health and Family Medicine, College of Medicine, University of Malawi, Private Bag 360, Chichiri, Blantyre 3, Malawi; (N.P.); (K.M.M.)
- Correspondence: (B.H.L.); (J.C.P.); Tel.: +265-881-131-422/993-226-040 (J.C.P.)
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Chauhan R, Awasthi S, Indoliya Y, Chauhan AS, Mishra S, Agrawal L, Srivastava S, Dwivedi S, Singh PC, Mallick S, Chauhan PS, Pande V, Chakrabarty D, Tripathi RD. Transcriptome and proteome analyses reveal selenium mediated amelioration of arsenic toxicity in rice (Oryza sativa L.). JOURNAL OF HAZARDOUS MATERIALS 2020; 390:122122. [PMID: 32006842 DOI: 10.1016/j.jhazmat.2020.122122] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/01/2020] [Accepted: 01/14/2020] [Indexed: 05/19/2023]
Abstract
Arsenic (As), a chronic poison and non-threshold carcinogen, is a food chain contaminant in rice, posing yield losses as well as serious health risks. Selenium (Se), a trace element, is a known antagonist of As toxicity. In present study, RNA seq. and proteome profiling, along with morphological analyses were performed to explore molecular cross-talk involved in Se mediated As stress amelioration. The repair of As induced structural deformities involving disintegration of cell wall and membranes were observed upon Se supplementation. The expression of As transporter genes viz., NIP1;1, NIP2;1, ABCG5, NRAMP1, NRAMP5, TIP2;2 as well as sulfate transporters, SULTR3;1 and SULTR3;6, were higher in As + Se compared to As alone exposure, which resulted in reduced As accumulation and toxicity. The higher expression of regulatory elements like AUX/IAA, WRKY and MYB TFs during As + Se exposure was also observed. The up-regulation of GST, PRX and GRX during As + Se exposure confirmed the amelioration of As induced oxidative stress. The abundance of proteins involved in photosynthesis, energy metabolism, transport, signaling and ROS homeostasis were found higher in As + Se than in As alone exposure. Overall, present study identified Se responsive pathways, genes and proteins involved to cope-up with As toxicity in rice.
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Affiliation(s)
- Reshu Chauhan
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Department of Biotechnology, Kumaun University, Bhimtal, Nainital, Uttarakhand, India
| | - Surabhi Awasthi
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, 221005, India
| | - Yuvraj Indoliya
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Abhishek Singh Chauhan
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Shashank Mishra
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India
| | - Lalit Agrawal
- Department of Agriculture and Allied Science, Doon Business School, Dehradun, Uttarakhand, India
| | - Sudhakar Srivastava
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, 221005, India
| | - Sanjay Dwivedi
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Poonam C Singh
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Shekhar Mallick
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Puneet Singh Chauhan
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Bhimtal, Nainital, Uttarakhand, India
| | - Debasis Chakrabarty
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Rudra Deo Tripathi
- CSIR - National Botanical Research Institute, Council of Scientific and Industrial Research, Rana Pratap Marg, Lucknow, 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India.
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Fischer S, Hilger T, Piepho HP, Jordan I, Karungi J, Towett E, Shepherd K, Cadisch G. Soil and farm management effects on yield and nutrient concentrations of food crops in East Africa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 716:137078. [PMID: 32044491 DOI: 10.1016/j.scitotenv.2020.137078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/28/2020] [Accepted: 01/31/2020] [Indexed: 06/10/2023]
Abstract
Crops that grow on soils with higher fertility often have higher yields and higher tissue nutrient concentrations. Whether this is the case for all crops, and which soil and management factors, or combinations mostly affect yields and food nutrient concentrations however, is poorly understood. Here, the main aim was to evaluate effects of soil and management factors on crop yields and food nutrient concentrations in (i) grain, fruit and tuber crops, and (ii) between high and low soil fertility areas. Total elemental concentrations of Mg, P, S, K, Ca, Fe, Zn, Mn and Cu were measured using a portable X-Ray Fluorescence Spectrometer (pXRF) in maize grain (Zea mays; Teso South, Kenya: n = 31; Kapchorwa, Uganda n = 30), cassava tuber (Manihot esculenta; Teso South: n = 27), and matooke fruit (Musa acuminata; Kapchorwa, n = 54). Soil properties measured were eCEC, total N and C, pH, texture, and total elemental content. Farm management variables (fertilisation, distance to household, and crop diversity) were collected. Canonical Correspondence Analyses (CCA) with permutation rank tests identified driving factors of alterations in nutrient concentrations. Maize grain had higher correlations with soil factors (CCA > 80%), than cassava tuber (76%) or matooke fruit (39%). In contrast, corresponding correlations to management factors were much lower (8-39%). The main soil properties affecting food nutrients were organic matter and texture. Surprisingly, pH did not play an important role. A positive association of crop diversity with nutrient concentration and yield in lower fertility areas was observed. Considering, food nutrient composition, apart from yield, as response variables in agronomic trials (e.g. fertilisation or soil improvement strategies), would contribute towards discounting the notion that crops growing on fertile soils always produce healthy and high quality foods.
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Affiliation(s)
- Sahrah Fischer
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Garbenstr. 13, 70599 Stuttgart, Germany.
| | - Thomas Hilger
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Garbenstr. 13, 70599 Stuttgart, Germany
| | - Hans-Peter Piepho
- Institute of Crop Sciences, University of Hohenheim, Fruwirthstr. 20, 70599 Stuttgart, Germany
| | - Irmgard Jordan
- Center for International Development and Environmental Research, Justus Liebig University Giessen, Senckenbergstraße 3, 35390 Giessen, Germany
| | - Jeninah Karungi
- Department of Agricultural Production, Makerere University, Wandegeya, Makerere, P.O. Box 7062, Kampala, Uganda
| | - Erick Towett
- Land Health Decisions, World Agroforestry Centre, United Nations Avenue, Gigiri, PO Box 30677, Nairobi 00100, Kenya
| | - Keith Shepherd
- Land Health Decisions, World Agroforestry Centre, United Nations Avenue, Gigiri, PO Box 30677, Nairobi 00100, Kenya
| | - Georg Cadisch
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Garbenstr. 13, 70599 Stuttgart, Germany
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Hawrami KAM, Crout NMJ, Shaw G, Bailey EH. Assessment of potentially toxic elements in vegetables cultivated in urban and peri-urban sites in the Kurdistan region of Iraq and implications for human health. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:1359-1385. [PMID: 31587159 DOI: 10.1007/s10653-019-00426-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Vegetable fields in and around urban areas in the Kurdistan region of Iraq may have higher than background concentrations of potentially toxic elements (PTEs) from contamination sources including municipal waste disposal and wastewater used for irrigation. The purpose of this study was to assess PTE concentrations in soils and the edible parts of field-grown vegetables to quantify potential health risks to the local population. In this survey, 174 soils and 26 different vegetable and fruit types were sampled from 15 areas around Sulaymaniyah and Halabja cities. Sampling was undertaken from fields in urban, peri-urban and rural locations including sites close to areas of waste disposal. The soils are calcareous (pH 7.67-8.21) and classified as silty loam, sandy or silty clay with organic matter content between 6.62 and 11.4%. Concentrations of PTEs were typically higher in waste disposal areas compared with urban, peri-urban and rural areas. Pollution load indices suggested that agricultural soils near waste disposal sites were contaminated with some trace elements. Potentially toxic element concentrations in vegetables were highly variable. Higher total concentrations of PTEs were measured in vegetables from the waste areas with decreasing concentrations in urban, peri-urban and rural areas. Risks to human health were assessed using hazard quotients (HQ). Vegetable consumption poses no risk for adults, whereas children might be exposed to Ni, As and Cd. Although HQs suggest elevated risk for children from consumption of some vegetables, these risks are likely to be lower when realistic dietary consumption levels are considered.
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Affiliation(s)
- Karzan A M Hawrami
- School of Biosciences, University of Nottingham, Sutton Bonington Campus Loughborough, Leicestershire, LE12 5RD, UK
- Sulaymaniyah Polytechnic University, Technical Institute of Halabja, Zamaqi, Halabja, Iraq
| | - Neil M J Crout
- School of Biosciences, University of Nottingham, Sutton Bonington Campus Loughborough, Leicestershire, LE12 5RD, UK
| | - George Shaw
- School of Biosciences, University of Nottingham, Sutton Bonington Campus Loughborough, Leicestershire, LE12 5RD, UK
| | - Elizabeth H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus Loughborough, Leicestershire, LE12 5RD, UK.
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Ligowe IS, Phiri FP, Ander EL, Bailey EH, Chilimba ADC, Gashu D, Joy EJM, Lark RM, Kabambe V, Kalimbira AA, Kumssa DB, Nalivata PC, Young SD, Broadley MR. Selenium deficiency risks in sub-Saharan African food systems and their geospatial linkages. Proc Nutr Soc 2020; 79:1-11. [PMID: 32264979 DOI: 10.1017/s0029665120006904] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Selenium (Se) is an essential element for human health. However, our knowledge of the prevalence of Se deficiency is less than for other micronutrients of public health concern such as iodine, iron and zinc, especially in sub-Saharan Africa (SSA). Studies of food systems in SSA, in particular in Malawi, have revealed that human Se deficiency risks are widespread and influenced strongly by geography. Direct evidence of Se deficiency risks includes nationally representative data of Se concentrations in blood plasma and urine as population biomarkers of Se status. Long-range geospatial variation in Se deficiency risks has been linked to soil characteristics and their effects on the Se concentration of food crops. Selenium deficiency risks are also linked to socio-economic status including access to animal source foods. This review highlights the need for geospatially-resolved data on the movement of Se and other micronutrients in food systems which span agriculture-nutrition-health disciplinary domains (defined as a GeoNutrition approach). Given that similar drivers of deficiency risks for Se, and other micronutrients, are likely to occur in other countries in SSA and elsewhere, micronutrient surveillance programmes should be designed accordingly.
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Affiliation(s)
- I S Ligowe
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
- The Department of Agricultural Research Services, P.O. Box 30799, Lilongwe 3, Malawi
| | - F P Phiri
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
- Department of Nutrition, HIV and AIDS, Ministry of Health, Lilongwe, Malawi
| | - E L Ander
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, NG12 5GG, UK
| | - E H Bailey
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
| | - A D C Chilimba
- The Department of Agricultural Research Services, P.O. Box 30799, Lilongwe 3, Malawi
| | - D Gashu
- Center for Food Science and Nutrition, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - E J M Joy
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel Street, LondonWC1E 7HT, UK
| | - R M Lark
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
| | - V Kabambe
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
| | - A A Kalimbira
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
| | - D B Kumssa
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
| | - P C Nalivata
- Lilongwe University of Agriculture and Natural Resources, Bunda Campus, P.O. Box 219, Lilongwe, Malawi
| | - S D Young
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
| | - M R Broadley
- School of Biosciences, University of Nottingham, Bonington Campus, Loughborough, LeicestershireLE12 5RD, UK
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Nakaona L, Maseka KK, Hamilton EM, Watts MJ. Using human hair and nails as biomarkers to assess exposure of potentially harmful elements to populations living near mine waste dumps. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:1197-1209. [PMID: 31317372 DOI: 10.1007/s10653-019-00376-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/09/2019] [Indexed: 05/21/2023]
Abstract
Potentially harmful elements (PHEs) manganese (Mn), cobalt (Co), copper (Cu), lead (Pb), nickel (Ni) and zinc (Zn) were measured in human hair/nails, staple crops and drinking water to ascertain the level of exposure to dust transference via wind and rain erosion for members of the Mugala community living near a mine waste dump in the Zambian Copperbelt. The mean PHE concentrations of hair in decreasing order were Zn (137 ± 21 mg/kg), Cu (38 ± 7 mg/kg), Mn (16 ± 2 mg/kg), Pb (4.3 ± 1.9 mg/kg), Ni (1.3 ± 0.2 mg/kg) and Cr (1.2 ± 0.2 mg/kg), Co (0.9 ± 0.2 mg/kg) and Cd (0.30 ± 0.02 mg/kg). Whilst for toenails the decreasing order of mean concentrations was Zn (172 ± 27 mg/kg), Cu (30 ± 5 mg/kg), Mn (12 ± 2 mg/kg), Pb (4.8 ± 0.5 mg/kg), Ni (1.7 ± 0.14 mg/kg) and Co (1.0 ± 0.02 mg/kg), Cr (0.6 ± 0.1 mg/kg) and Cd (0.1 ± 0.002 mg/kg). The concentration of these potentially harmful elements (PHEs) varied greatly among different age groups. The results showed that Mn, Co, Pb, Cd and Zn were above the interval values (Biolab in Nutritional and environmental medicine, Hair Mineral Analysis, London, 2012) at 0.2-2.0 mg/kg for Mn, 0.01-0.20 mg/kg for Co, < 2.00 mg/kg for Pb, < 0.10 mg/kg for Cd and 0.2-2.00 mg/kg for Zn, whilst Ni, Cu and Cr concentrations were within the normal range concentrations of < 1.40 mg/kg, 10-100 mg/kg and 0.1-1.5 mg/kg, respectively. Dietary intake of PHEs was assessed from the ingestion of vegetables grown in Mugala village, with estimated PHE intakes expressed on a daily basis calculated for Mn (255), Pb (48), Ni (149) and Cd (33) µg/kg bw/day. For these metals, DI via vegetables was above the proposed limits of the provisional tolerable daily intakes (PTDIs) (WHO in Evaluation of certain food additive and contaminants, Seventy-third report of the Joint FAO/WHO Expert Committee on Food Additives, 2011) for Mn at 70 µg/kg bw/day, Pb at 3 µg/kg bw/day, Ni and Cd 5 µg/kg bw/day and 1 µg/kg bw/day, respectively. The rest of the PHEs listed were within the PTDIs limits. Therefore, Mugala inhabitants are at imminent health risk due to lead, nickel and cadmium ingestion of vegetables and drinking water at this location.
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Affiliation(s)
- Lukundo Nakaona
- School of Natural Sciences, Copperbelt University, Kitwe, Zambia
| | - Kakoma K Maseka
- School of Natural Sciences, Copperbelt University, Kitwe, Zambia
| | - Elliott M Hamilton
- Inorganic Geochemistry, Centre for Environment Geochemistry, British Geological Survey, Nottingham, UK
| | - Michael J Watts
- Inorganic Geochemistry, Centre for Environment Geochemistry, British Geological Survey, Nottingham, UK.
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