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The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato

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,...

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Autores principales: Zhang, Yule, He, Tengbing, Tian, Weijun, Xia, Yabei, He, Yeqing, Su, Minmin, He, Guandi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10253094/
https://www.ncbi.nlm.nih.gov/pubmed/37298282
http://dx.doi.org/10.3390/ijms24119322
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author Zhang, Yule
He, Tengbing
Tian, Weijun
Xia, Yabei
He, Yeqing
Su, Minmin
He, Guandi
author_facet Zhang, Yule
He, Tengbing
Tian, Weijun
Xia, Yabei
He, Yeqing
Su, Minmin
He, Guandi
author_sort Zhang, Yule
collection PubMed
description 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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spelling pubmed-102530942023-06-10 The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato Zhang, Yule He, Tengbing Tian, Weijun Xia, Yabei He, Yeqing Su, Minmin He, Guandi Int J Mol Sci Article 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. MDPI 2023-05-26 /pmc/articles/PMC10253094/ /pubmed/37298282 http://dx.doi.org/10.3390/ijms24119322 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Yule
He, Tengbing
Tian, Weijun
Xia, Yabei
He, Yeqing
Su, Minmin
He, Guandi
The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title_full The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title_fullStr The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title_full_unstemmed The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title_short The Expression of the StNRAMP2 Gene Determined the Accumulation of Cadmium in Different Tissues of Potato
title_sort expression of the stnramp2 gene determined the accumulation of cadmium in different tissues of potato
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10253094/
https://www.ncbi.nlm.nih.gov/pubmed/37298282
http://dx.doi.org/10.3390/ijms24119322
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