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Zhang Y, He T, Tian W, Xia Y, He Y, Su M, He G. The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato. Int J Mol Sci 2023; 24:ijms24119322. [PMID: 37298282 DOI: 10.3390/ijms24119322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/18/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Cadmium (Cd) is a toxic metal that threatens human health when enriched in crops. NRAMPs are a family of natural macrophage proteins reported to play a key role in Cd transport in plants. In order to explore the gene regulation mechanism of potato under Cd stress and the role of NRAMPs family in it, this study analyzed the gene expression differences of two different Cd accumulation levels in potato after 7 days of 50 mg/kg Cd stress and screened out the key genes that may play a major role in the differential accumulation of Cd in different varieties. Additionally, StNRAMP2 was selected for verification. Further verification showed that the StNRAMP2 gene plays an important role in the accumulation of Cd in potato. Interestingly, silencing StNRAMP2 increased Cd accumulation in tubers but significantly decreased Cd accumulation in other sites, suggesting a critical role of StNRAMP2 in Cd uptake and transport in potatoes. To further confirm this conclusion, we performed heterologous expression experiments in which overexpression of StNRAMP2 gene in tomato resulted in a threefold increase in Cd content, which further confirmed the important role of StNRAMP2 in the process of Cd accumulation compared with wild-type plants. In addition, we found that the addition of Cd to the soil increased the activity of the plant antioxidant enzyme system, and silencing StNRAMP2 partially reversed this effect. This suggests that the StNRAMP2 gene plays an important role in plant stress tolerance, and future studies could further explore the role of this gene in other environmental stresses. In conclusion, the results of this study improve the understanding of the mechanism of Cd accumulation in potato and provide experimental basis for remediation of Cd pollution.
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Affiliation(s)
- Yule Zhang
- College of Agriculture, Guizhou University, Guiyang 550025, China
| | - Tengbing He
- College of Agriculture, Guizhou University, Guiyang 550025, China
- Institute of New Rural Development, Guizhou University, Guiyang 550025, China
| | - Weijun Tian
- College of Agriculture, Guizhou University, Guiyang 550025, China
| | - Yabei Xia
- Research and Development Center of Fine Chemical Industry, Guizhou University, Guiyang 550025, China
| | - Yeqing He
- College of Agriculture, Guizhou University, Guiyang 550025, China
| | - Minmin Su
- College of Agriculture, Guizhou University, Guiyang 550025, China
| | - Guandi He
- College of Agriculture, Guizhou University, Guiyang 550025, China
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2
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Gong S, Wang H, Lou F, Qin R, Fu T. Calcareous Materials Effectively Reduce the Accumulation of Cd in Potatoes in Acidic Cadmium-Contaminated Farmland Soils in Mining Areas. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11736. [PMID: 36142008 PMCID: PMC9517293 DOI: 10.3390/ijerph191811736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
The in situ chemical immobilization method reduces the activity of heavy metals in soil by adding chemical amendments. It is widely used in farmland soil with moderate and mild heavy metal pollution due to its high efficiency and economy. However, the effects of different materials depend heavily on environmental factors such as soil texture, properties, and pollution levels. Under the influence of lead-zinc ore smelting and soil acidification, Cd is enriched and highly activated in the soils of northwestern Guizhou, China. Potato is an important economic crop in this region, and its absorption of Cd depends on the availability of Cd in the soil and the distribution of Cd within the plant. In this study, pot experiments were used to compare the effects of lime (LM), apatite (AP), calcite (CA), sepiolite (SP), bentonite (BN), and biochar (BC) on Cd accumulation in potatoes. The results showed that the application of LM (0.4%), AP (1.4%), and CA (0.4%) had a positive effect on soil pH and cations, and that they effectively reduced the availability of Cd in the soil. In contrast, the application of SP, BN, and BC had no significant effect on the soil properties and Cd availability. LM, AP, and CA treatment strongly reduced Cd accumulation in the potato tubers by controlling the total 'flux' of Cd into the potato plants. In contrast, the application of SP and BN promoted the migration of Cd from the root to the shoot, while the effect of BC varied by potato genotype. Overall, calcareous materials (LM, CA, and AP) were more applicable in the remediation of Cd-contaminated soils in the study area.
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Affiliation(s)
| | - Hu Wang
- Guizhou Chuyang Ecological Environmental Protection Technology Co., Ltd., Guiyang 550025, China
| | - Fei Lou
- Guizhou University, Guiyang 550025, China
| | - Ran Qin
- Guizhou University, Guiyang 550025, China
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3
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Liu K, Liu H, Zhou X, Chen Z, Wang X. Cadmium Uptake and Translocation By Potato in Acid and Calcareous Soils. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 107:1149-1154. [PMID: 34562128 DOI: 10.1007/s00128-021-03377-3] [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: 01/05/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Cadmium contamination of agricultural soils threatens food safety. The bioaccumulation (BAF) of Cd in potato tubers ranged from 0.69 to 1.50 and 0.39 to 0.82 in acidic yellow and alkaline calcareous soils, respectively, when 0.3 to 4.8 mg Cd kg-1 was added to the soil. The order of Cd concentration for different organs was root > stem > leaf > tuber. The BAF of Cd decreased with the increase of soil Cd concentration. The effect of pH was important for the transfer and accumulation of Cd for potato. Soil Cd concentration was correlated with the plant Cd concentration and soil pH. Cultivars Hui-2 and Xuanshu 2 accumulated less Cd in six potato cultivars. Logarithmic transformation of the data increased the R2 value from 0.725 to 0.941 in the prediction model of soil Cd concentration. The data are useful in assessing the ecological risk of Cd to potato in Karst area.
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Affiliation(s)
- Ke Liu
- College of Agriculture, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment of Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Hongyan Liu
- College of Agriculture, Guizhou University, 550025, Guiyang, China.
- Key Laboratory of Karst Georesources and Environment of Ministry of Education, Guizhou University, 550025, Guiyang, China.
- College of Agriculture, Guizhou University, Guizhou Province, Huaxi District, Guiyang City, China.
| | - Xianyong Zhou
- College of Agriculture, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment of Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Zhu Chen
- College of Agriculture, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment of Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Xulian Wang
- College of Agriculture, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment of Ministry of Education, Guizhou University, 550025, Guiyang, China
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4
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Arévalo-Hernández CO, Arévalo-Gardini E, Barraza F, Farfán A, He Z, Baligar VC. Growth and nutritional responses of wild and domesticated cacao genotypes to soil Cd stress. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 763:144021. [PMID: 33383517 DOI: 10.1016/j.scitotenv.2020.144021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 11/17/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd), a toxic non-essential metal, is easily accumulated in cacao tissues. This represents a risk for cacao exportation, and consequently it affects the economic well-being of the resource-poor-small-producers in Latin America. A greenhouse experiment was conducted with 53 wild and domesticated cacao genotypes to determine their response to Cd in terms of growth and Cd and essential nutrients accumulation. Cacao seedlings were grown for 6 months in an acidic soil with or without added Cd. The total concentration of macro (Ca, K, Mg, N and P) and micronutrients (B, Cu, Fe, Mn and Zn) as well as Cd were measured in shoots along with growth (biometric) parameters after harvest. The results revealed that even if there was a wide range of Cd concentrations among genotypes, there was a reduction in the concentration of essential nutrients in genotypes grown in Cd spiked soils, however these concentrations were not significantly different from the control. In the case of growth parameters, the effects of Cd were diverse across all genotypes some of them being more tolerant to Cd stress than others. Thus, different growth responses to Cd stress are related to a genotype effect. Based on their lower Cd concentration, a total of 11 cacao genotypes (AYP-22, PAS-105, UGU-126, ICT-1026, ICT-1087, ICT-1189, ICT-1292, PH-17, CCN-51, ICS-39 and TSH-565) are proposed here as low Cd-accumulating genotypes. Therefore, these genotypes are potentially useful as rootstock to reduce uptake and transport of Cd, especially in economically important cacao cultivars.
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Affiliation(s)
| | - Enrique Arévalo-Gardini
- Instituto de Cultivos Tropicales (ICT), Tarapoto, Peru; Universidad Nacional Autónoma de Alto Amazonas, Yurimaguas, Peru
| | - Fiorella Barraza
- Instituto de Cultivos Tropicales (ICT), Tarapoto, Peru; Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2G7, Canada
| | - Abel Farfán
- Instituto de Cultivos Tropicales (ICT), Tarapoto, Peru
| | - Zhenli He
- University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945, USA
| | - Virupax C Baligar
- U.S. Department of Agriculture/Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA
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5
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Barraza F, Schreck E, Uzu G, Lévêque T, Zouiten C, Boidot M, Maurice L. Beyond cadmium accumulation: Distribution of other trace elements in soils and cacao beans in Ecuador. ENVIRONMENTAL RESEARCH 2021; 192:110241. [PMID: 32980301 DOI: 10.1016/j.envres.2020.110241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/07/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
Since cacao beans accumulate Cd in high levels and restrictions have been imposed on safe levels of chocolate consumption, concern about whether or not cacao trees store other toxic elements seems to be inevitable. Following a previous study in Ecuador examining Cd content in five cacao varieties collected in pristine areas and in places impacted by oil activities, we present here the concentrations of 11 trace elements (TEs) (As, Ba, Co, Cu, Cr, Mo, Mn, Ni, Pb, V and Zn) in soils, cacao tissues (leaves, pod husks, beans) and cocoa liquor (CL). Several TEs showed concentrations in topsoils above the Ecuadorian limits, and may have a mixed natural and anthropogenic origin. Ba and Mo concentrations in cacao tissues are slightly higher than those reported in other surveys, but this was not the case for toxic elements (As and Pb). TE contents are lower in CL, than in beans, except for Pb and Co, but no risk was identified for human health. Compared with control areas, Enrichment Factors were below 2 in impacted areas, except for Ba. Transfer factors (from soils to cacao) indicated that cacao does not accumulate TEs. A positive correlation was found between Cd and Zn in topsoils and cacao tissues for the CCN-51 variety, and between Cd and Ni for the Nacional variety. Identifying patterns of TE distribution and potential interactions in order to explain plant internal mechanisms, which is also dependent on the cacao variety, is a difficult task and needs further research.
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Affiliation(s)
- Fiorella Barraza
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées, Université de Toulouse, CNRS, IRD, 14 Avenue E. Belin, F-31400, Toulouse, France.
| | - Eva Schreck
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées, Université de Toulouse, CNRS, IRD, 14 Avenue E. Belin, F-31400, Toulouse, France
| | - Gaëlle Uzu
- IGE, Université Grenoble Alpes, CNRS, IRD, CS 40700, F-38058, Grenoble, France
| | - Thibaut Lévêque
- Escuela Politécnica Nacional, Departamento de Ciencias de Alimentos y Biotecnología, P.O. Box 17 012759, Quito, Ecuador
| | - Cyril Zouiten
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées, Université de Toulouse, CNRS, IRD, 14 Avenue E. Belin, F-31400, Toulouse, France
| | - Mathieu Boidot
- CEA Liten, Direction des technologies des nanomatériaux, F- 38054, Grenoble, France
| | - Laurence Maurice
- Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées, Université de Toulouse, CNRS, IRD, 14 Avenue E. Belin, F-31400, Toulouse, France; Universidad Andina Simón Bolívar, Área de Salud, P.O. Box 17-12-569, Quito, Ecuador
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6
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Huang F, Zhou H, Gu J, Liu C, Yang W, Liao B, Zhou H. Differences in absorption of cadmium and lead among fourteen sweet potato cultivars and health risk assessment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 203:111012. [PMID: 32684522 DOI: 10.1016/j.ecoenv.2020.111012] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
Planting sweet potato (Ipomoea batatas (L.) Lam.) instead of rice in the area contaminated with heavy metals is one of the measures to ensure people's health and agricultural economy. Therefore, it is important to screen the low accumulation cultivars of sweet potato and to find out the concentration rule of cadmium (Cd) and lead (Pb) in edible parts along with the associated health risks to humans. A field experiment was performed with fourteen of three main types (starch, purple, and edible-type) of sweet potato cultivars grown on farmland polluted with Cd and Pb in eastern Hunan Province, China. The Cd and Pb concentrations in the sweet potato tissues as well as the yield were measured. The yield of the shoot and tuberous root of the fourteen sweet potato cultivars ranged from 14.59 to 68.57 and 26.35-50.76 t ha-1 with mean values of 33.09 and 33.46 t ha-1, respectively. Compared with purple and edible-type cultivars, the starch-type cultivar had lower Cd and Pb concentrations in the flesh, but higher in the shoot. The Cd and Pb concentrations in the flesh of cultivars Shangshu 19, Sushu 24, Yushu 98, and Xiangshu 98 were lower than MCL provided in Chinese National Food Safety Standards GB2762-2017. Based on the hazard index (HI), the consumption of sweet potato flesh is lower health risk, while shoots pose a greater health risk to local people and Cd is the main cause of the risk. As a result, sweet potato cultivars Shangshu 19, Sushu 24, Yushu 98 and Xiangshu 98 can be plant in serve Cd and Pb contaminated soils with the advantages of easy cultivation, high yield and economic benefits without stopping agricultural production.
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Affiliation(s)
- Fang Huang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Hong Zhou
- Crop Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
| | - Jiaofeng Gu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Canyang Liu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Wenjun Yang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Bohan Liao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Hang Zhou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
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7
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Zhao M, Li T, Yu H, Zhang X, Zheng Z, Wang Y, Liu T, Gupta DK, Huang H. Fractionation and chemical structure of dissolved organic matter in the rhizosphere associated with cadmium accumulation in tobacco lines (Nicotiana tabacum L.). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17794-17803. [PMID: 32162218 DOI: 10.1007/s11356-020-08223-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
Reducing cadmium (Cd) accumulation in flue-cured tobacco is the main degree to reduce the harm of Cd to human health. In this study, a rhizobag experiment was conducted to investigate the characteristics of dissolved organic matter (DOM) in the rhizosphere of a low-Cd-accumulating tobacco line (RG11) and its role in the processes of Cd accumulation by plants. Cd concentrations in the roots and leaves of RG11 were 24.09-25.30 and 31.08-34.41% lower, respectively, than those of Yuyan5 under Cd stress. Cd exposure promoted DOM accumulation in the rhizosphere soils of the two tobacco lines. DOM concentrations in the rhizosphere soils of RG11 were 8.29-14.31% lower than those of Yuyan5 under Cd stress. RG11 presented less hydrophilic acid and hydrophilic base fractions, along with more hydrophobic acid and hydrophobic base fractions of DOM in the rhizosphere than those of Yuyan5 under Cd exposure. Fourier transform infrared spectroscopy results showed that RG11 exhibited less O-H, C-H, C=C, COO-, and C-O functional groups in rhizosphere DOM than those of Yuyan5 under Cd stress. Thus, the DOM in the rhizosphere of RG11 showed lower ability to solubilize Cd in soils, resulting in less Cd uptake by roots. This could be considered to be one of the important mechanisms of low Cd accumulation in leaves of RG11.
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Affiliation(s)
- Ming Zhao
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Tingxuan Li
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Haiying Yu
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Xizhou Zhang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Zicheng Zheng
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Yongdong Wang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Tao Liu
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Dharmendra K Gupta
- Institut für Radioökologie und Strahlenschutz (IRS), Gottfried Wilhelm Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419, Hannover, Germany
| | - Huagang Huang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China.
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8
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Ye Y, Dong W, Luo Y, Fan T, Xiong X, Sun L, Hu X. Cultivar diversity and organ differences of cadmium accumulation in potato (Solanum tuberosum L.) allow the potential for Cd-safe staple food production on contaminated soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 711:134534. [PMID: 31810668 DOI: 10.1016/j.scitotenv.2019.134534] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/17/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) is a toxic element that can accumulate in plants and poses a threat to human health through biomagnification. There are differences in Cd levels among different plants tissues. Hence, an optimal crop that possesses low Cd levels in the edible parts but high levels in the inedible parts is urgently needed to simultaneously lower soil-Cd levels in contaminated fields and to produce Cd-safe crops. In this study, we investigated the Cd levels in tubers and other tissues of potato (Solanum tuberosum L.) using different experimental approaches, and identified variations in Cd accumulation in different potato cultivars and characterized the Cd-distribution pattern in potato. Our results showed that Cd accumulation in tubers of the tested cultivars varied greatly, and that tuber-Cd levels were much lower than in the stems or leaves. Two-way ANOVA revealed that the tuber-Cd levels in potato are determined by both genotypic differences and the soil-Cd levels of the farmlands. Among the cultivars tested, one cultivar, 'Eshu10', was found to have the lowest tuber-Cd levels but had much higher Cd levels in leaf and stem tissues. Our study shows that the Cd-distribution pattern within potato plants makes it an ideal candidate for the safe production of a staple food that also has the potential to contribute to the remediation of contaminated soils.
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Affiliation(s)
- Yixin Ye
- Hunan Provincial Engineering Research Center for Potatoes, College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China; Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Wen Dong
- Hunan Provincial Engineering Research Center for Potatoes, College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China
| | - Yu Luo
- Hunan Provincial Engineering Research Center for Potatoes, College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China
| | - Tony Fan
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Toronto, Toronto M5S 2E5, Canada
| | - Xingyao Xiong
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Liang Sun
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Xinxi Hu
- Hunan Provincial Engineering Research Center for Potatoes, College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China.
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9
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Barraza F, Moore RET, Rehkämper M, Schreck E, Lefeuvre G, Kreissig K, Coles BJ, Maurice L. Cadmium isotope fractionation in the soil – cacao systems of Ecuador: a pilot field study. RSC Adv 2019; 9:34011-34022. [PMID: 35528875 PMCID: PMC9073709 DOI: 10.1039/c9ra05516a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 10/14/2019] [Indexed: 12/22/2022] Open
Abstract
The often high Cd concentrations of cacao beans are a serious concern for producers in Latin America due to the implementation of stricter Cd limits for cocoa products by the European Union in 2019. This is the first investigation to employ coupled Cd isotope and concentration measurements to study soil – cacao systems. Analyses were carried out for 29 samples of soils, soil amendments and cacao tree organs from organic farms in Ecuador that harvest three distinct cacao cultivars. The majority of soils from 0–80 cm depth have very similar δ114/110Cd of about −0.1‰ to 0‰. Two 0–5 cm topsoils, however, have high Cd concentrations coupled with heavy Cd isotope compositions of δ114/110Cd ≈ 0.2%, possibly indicating Cd additions from the tree litter used as organic fertilizer. Whilst cacao leaves, pods and beans are ubiquitously enriched in Cd relative to soils there are distinct Cd isotope signatures. The leaves and pods are isotopically heavier than the soils, with similar Δ114/110Cdleaf–soil values of 0.22 ± 0.07‰ to 0.41 ± 0.09‰. In contrast, the data reveal differences in Δ114/110Cdbean–leaf that may be linked to distinct cacao cultivars. In detail, Δ114/110Cdbean–leaf values of −0.34‰ to −0.40‰ were obtained for Nacional cacao from two farms, whilst CCN-51 hybrid cacao from a third farm showed no fractionation within error (−0.08 ± 0.13‰). As such, further work to investigate whether Cd isotopes are indeed useful for tracing sources of Cd enrichments in soils and to inform genetic efforts to reduce the Cd burden of cocoa is indicated. Cd isotope composition in cacao seems to be cultivar-specific whereas Cd in soil is probably due to tree litter recycling.![]()
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Affiliation(s)
- Fiorella Barraza
- Géosciences Environnement Toulouse (GET)
- Observatoire Midi-Pyrénées
- CNRS
- IRD
- Université de Toulouse
| | - Rebekah E. T. Moore
- Department of Earth Science & Engineering
- Imperial College London
- London SW7 2AZ
- UK
| | - Mark Rehkämper
- Department of Earth Science & Engineering
- Imperial College London
- London SW7 2AZ
- UK
| | - Eva Schreck
- Géosciences Environnement Toulouse (GET)
- Observatoire Midi-Pyrénées
- CNRS
- IRD
- Université de Toulouse
| | - Grégoire Lefeuvre
- Géosciences Environnement Toulouse (GET)
- Observatoire Midi-Pyrénées
- CNRS
- IRD
- Université de Toulouse
| | - Katharina Kreissig
- Department of Earth Science & Engineering
- Imperial College London
- London SW7 2AZ
- UK
| | - Barry J. Coles
- Department of Earth Science & Engineering
- Imperial College London
- London SW7 2AZ
- UK
| | - Laurence Maurice
- Géosciences Environnement Toulouse (GET)
- Observatoire Midi-Pyrénées
- CNRS
- IRD
- Université de Toulouse
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10
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Jiao W, Du R, Ye M, Sun M, Feng Y, Wan J, Zhao Y, Zhang Z, Huang D, Du D, Jiang X. 'Agricultural Waste to Treasure' - Biochar and eggshell to impede soil antibiotics/antibiotic resistant bacteria (genes) from accumulating in Solanum tuberosum L. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:2088-2095. [PMID: 29945818 DOI: 10.1016/j.envpol.2018.06.059] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
Soil contamination with antibiotics and antibiotic resistant bacteria/genes (ARB/ARGs) has becoming an emerging environmental problem. Moreover, the mixed pollutants' transfer and accumulation from soil to tuberous vegetables has posed a great threat against food security and human health. In this work, the application of two absorbing materials (maize biochar and sulfate modified eggshell) was able to reduce the poisonous effect of soil antibiotics on potato root system by stimulate the dissipation of water-soluble antibiotics in soil; and also improve food quality by increasing potato starch, protein, fat, and vitamins. Meanwhile, both amendments could effectively decrease the classes and the accumulative abundance of ARB and ARGs (sulI, sulII, catI, catII, ermA, ermB) in the edible parts of potato. The lowest abundance of ARGs was detected in the biochar application treatment, with the accumulative ARG level of 8.9 × 102 and 7.2 × 102 copies mL-1 in potato peel (sull + catI + ermA) and tuberous root (sulI), respectively. It is the first study to demonstrate the feasibility of biochar and eggshell derived from agricultural wastes as green absorbing materials to reduce soil antibiotic, ARB, and ARGs accumulation risk in tuberous vegetable.
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Affiliation(s)
- Wentao Jiao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Ruijun Du
- Institute of Environment and Ecology, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Mao Ye
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Mingming Sun
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanfang Feng
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jinzhong Wan
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection of China, Nanjing 210042, China
| | - Yuanchao Zhao
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhongyun Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Duan Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Daolin Du
- Institute of Environment and Ecology, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xin Jiang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Mengist MF, Alves S, Griffin D, Creedon J, McLaughlin MJ, Jones PW, Milbourne D. Genetic mapping of quantitative trait loci for tuber-cadmium and zinc concentration in potato reveals associations with maturity and both overlapping and independent components of genetic control. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2018; 131:929-945. [PMID: 29307117 DOI: 10.1007/s00122-017-3048-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 12/21/2017] [Indexed: 06/07/2023]
Abstract
Cd is a toxic metal, whilst Zn is an essential for plant and human health. Both can accumulate in potato tubers. We examine the genetic control of this process. The aim of this study was to map quantitative trait loci (QTLs) influencing tuber concentrations of cadmium (Cd) and zinc (Zn). We developed a segregating population comprising 188 F1 progeny derived from crossing two tetraploid cultivars exhibiting divergent tuber-Cd-accumulation phenotypes. These progeny were genotyped using the SolCap 8303 SNP array, and evaluated for Cd, Zn, and maturity-related traits. Linkage and QTL mapping were performed using TetraploidSNPMap software, which incorporates all allele dosage information. The final genetic map comprised 3755 SNP markers with average marker density of 2.94 per cM. Tuber-Cd and Zn concentrations were measured in the segregating population over 2 years. QTL mapping identified four loci for tuber-Cd concentration on chromosomes 3, 5, 6, and 7, which explained genetic variance ranging from 5 to 33%, and five loci for tuber-Zn concentration on chromosome 1, 3, 5, and, 6 explaining from 5 to 38% of genetic variance. Among the QTL identified for tuber-Cd concentration, three loci coincided with tuber-Zn concentration. The largest effect QTL for both tuber-Cd and Zn concentration coincided with the maturity locus on chromosome 5 where earliness was associated with increased tuber concentration of both metals. Coincident minor-effect QTL for Cd and Zn sharing the same direction of effect was also found on chromosomes 3 and 6, and these were unrelated to maturity The results indicate partially overlapping genetic control of tuber-Cd and Zn concentration in the cross, involving both maturity-related and non-maturity-related mechanisms.
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Affiliation(s)
- Molla F Mengist
- Teagasc, Crops Research Centre, Oak Park, Carlow, R93 XE12, Ireland
- School of Biological, Earth and Environmental Sciences, University College Cork, Western Road, Cork, Ireland
| | - Sheila Alves
- Teagasc, Crops Research Centre, Oak Park, Carlow, R93 XE12, Ireland
| | - Denis Griffin
- Teagasc, Crops Research Centre, Oak Park, Carlow, R93 XE12, Ireland
| | - Joanne Creedon
- Teagasc, Environmental Research Centre, Jonhstown Castle, Wexford, Ireland
| | - Mike J McLaughlin
- Soil Science Group, School of Agriculture, Food and Wine, The University of Adelaide, PMB 1 Waite Campus, Glen Osmond, SA, 5064, Australia
| | - Peter W Jones
- School of Biological, Earth and Environmental Sciences, University College Cork, Western Road, Cork, Ireland
| | - Dan Milbourne
- Teagasc, Crops Research Centre, Oak Park, Carlow, R93 XE12, Ireland.
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