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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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Variation and correlation of corm trace elements, anti-nutrients and sensory attributes of taro crisps. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Yi Z, Lehto NJ, Robinson BH, Cavanagh JAE. Environmental and edaphic factors affecting soil cadmium uptake by spinach, potatoes, onion and wheat. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 713:136694. [PMID: 32019035 DOI: 10.1016/j.scitotenv.2020.136694] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 01/13/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
The relative ease with which cadmium (Cd) in agricultural soils can transfer to crop plants can pose a potential health risk to consumers. However, efforts to predict and mitigate these risks are often confounded by the various factors that influence metal accumulation in the edible plant parts. The aim of this work was to identify key drivers that determine Cd concentrations in spinach leaves, potato tubers, onion bulbs and wheat grain grown in commercial horticultural operations across New Zealand (NZ). Paired soil and plant samples (n = 147) were collected from farms across different NZ growing regions. Cadmium concentrations in the edible parts were measured and four different tests were used to examine the potential bioavailability of soil Cd: pseudo-total and porewater concentrations, 0.05 M Ca(NO3)2-extraction and diffusive gradients in thin-films (DGT). Information on a range of soil and climatic variables was also collected. The methods' ability to represent Cd concentrations in the plant parts was assessed through single and multiple regression analysis that considered the different variables and the farm locations. Soil Cd concentrations determined by the different tests were positively related to plant concentrations and there were clear regional differences between these relationships. The Ca(NO3)2 extraction predicted over 76% of the variability in Cd concentrations in onion bulbs and spinach leaves, while DGT and porewater Cd provided the best estimates for potato tubers and wheat grains, respectively, once regional differences were considered, along with certain environmental and soil variables. The results show that certain soil and environmental factors can be a key influence for determining Cd accumulation in the edible parts of some plants and that regional differences are important for modulating the extent to which this occurs. These effects should be considered when trying to mitigate the potential risks arising from Cd in agricultural soils.
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Affiliation(s)
- Zicheng Yi
- Faculty of Agricultural and Life Sciences, Lincoln University, PO Box 7647, Lincoln 7647, New Zealand
| | - Niklas J Lehto
- Faculty of Agricultural and Life Sciences, Lincoln University, PO Box 7647, Lincoln 7647, New Zealand.
| | - Brett H Robinson
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - Jo-Anne E Cavanagh
- Manaaki Whenua - Landcare Research, Gerald Street, PO Box 69040, Lincoln 7640, New Zealand
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4
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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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5
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Mengist MF, Milbourne D, Griffin D, McLaughlin MJ, Creedon J, Jones PW, Alves S. Cadmium uptake and partitioning in potato (Solanum tuberosum L.) cultivars with different tuber-Cd concentration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:27384-27391. [PMID: 28975479 DOI: 10.1007/s11356-017-0325-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 09/25/2017] [Indexed: 06/07/2023]
Abstract
Potatoes grown in soil with high Cd concentrations can accumulate high levels of Cd in the tubers. Although there is significant environmental variation involved in the trait of crop uptake of Cd, there are also distinctive cultivar differences. In order to understand this differential Cd accumulation mechanism, two potato cultivars were chosen that accumulate high and low levels of Cd in tubers. The patterns of Cd concentration, Cd content and dry weight accumulation of the two cultivars were examined at different stages of plant growth. The data suggest that differences in total Cd uptake and in Cd partitioning among organs are the mechanisms governing differential Cd-tuber accumulation in the two cultivars. The low tuber-Cd accumulator exhibited lower root-to-shoot and shoot-to-tuber translocation driven by higher root and shoot biomass that retained more Cd in roots and shoots, respectively, reducing its movement to the tubers. Higher remobilization and more efficient tuber loading was observed in the high tuber-Cd accumulator, indicating that remobilization of Cd from leaves to tubers was a major factor, not only in tuber-Cd loading, but also in the establishment of differential tuber-Cd levels. Regardless of cultivar differences, the concentration of Cd in the tuber was very low compared to that in other organs suggesting that, despite its high phloem mobility, Cd tends to be sequestered in the shoots.
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Affiliation(s)
- Molla F Mengist
- Teagasc, Crops Research Centre, Oak Park, Co., Carlow, R93 XE12, Ireland
- School of Biological, Earth and Environmental Sciences, University College Cork, Western Road, Cork, Ireland
| | - Dan Milbourne
- Teagasc, Crops Research Centre, Oak Park, Co., Carlow, R93 XE12, Ireland
| | - Denis Griffin
- Teagasc, Crops Research Centre, Oak Park, Co., Carlow, R93 XE12, Ireland
| | - Mike J McLaughlin
- Soil Science Group, School of Agriculture, Food and Wine, University of Adelaide, PMB 1 Waite Campus, Glen Osmond, SA, 5064, Australia
| | - Joanne Creedon
- Teagasc, Environment Research Centre, Johnstown Castle, Co., Wexford, Y35 Y521, Ireland
| | - Peter W Jones
- School of Biological, Earth and Environmental Sciences, University College Cork, Western Road, Cork, Ireland
| | - Sheila Alves
- Teagasc, Crops Research Centre, Oak Park, Co., Carlow, R93 XE12, Ireland.
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6
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Ashrafzadeh S, Leung DWM. Novel potato plants with enhanced cadmium resistance and antioxidative defence generated after in vitro cell line selection. PLoS One 2017; 12:e0185621. [PMID: 28968406 PMCID: PMC5624614 DOI: 10.1371/journal.pone.0185621] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 09/15/2017] [Indexed: 11/18/2022] Open
Abstract
It is of interest to apply plant tissue culture to generate plants resistant to toxic effects of cadmium (Cd) on plant growth. Callus cultures were initiated from leaf explants of micropropagated potato plantlets (Solanum tuberosum L., cv. Iwa) for in vitro selection comprising 18 different Cd treatments varying in Cd exposure timing and duration. Plantlets regenerated from two different lines of Cd-selected calli, L9 and L11, were found to exhibit enhanced resistance to 218 μM Cd compared to control (source plantlets for leaf explants used to initiate callus cultures for Cd resistance). In response to 218 μM Cd, L11 plantlets had lower levels of lipid peroxidation and hydrogen peroxide than control and L9 plantlets. In addition, antioxidative enzyme activities in L11 were generally higher than control. L11 also had a higher level of proline than control.
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Affiliation(s)
- Seyedardalan Ashrafzadeh
- School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
| | - David W. M. Leung
- School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
- * E-mail:
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