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Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation
Nitrogen fertilization could improve the efficiency of Cd phytoextraction in contaminated soil and thus shorten the remediation time. However, limited information is available on the effect of N form on Cd phytoextraction and associated mechanisms in plants. This study examined the effect of N form...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014155/ https://www.ncbi.nlm.nih.gov/pubmed/27385767 http://dx.doi.org/10.1093/jxb/erw270 |
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author | Cheng, Miaomiao Wang, Peng Kopittke, Peter M. Wang, Anan Sale, Peter W.G. Tang, Caixian |
author_facet | Cheng, Miaomiao Wang, Peng Kopittke, Peter M. Wang, Anan Sale, Peter W.G. Tang, Caixian |
author_sort | Cheng, Miaomiao |
collection | PubMed |
description | Nitrogen fertilization could improve the efficiency of Cd phytoextraction in contaminated soil and thus shorten the remediation time. However, limited information is available on the effect of N form on Cd phytoextraction and associated mechanisms in plants. This study examined the effect of N form on Cd accumulation, translocation, and speciation in Carpobrotus rossii and Solanum nigrum. Plants were grown in nutrient solution with 5–15 μM Cd in the presence of 1000 µM NH(4) (+) or NO(3) (−). Plant growth and Cd uptake were measured, and Cd speciation was analyzed using synchrotron-based X-ray absorption spectroscopy. Shoot Cd accumulation was 30% greater with NH(4) (+) than NO(3) (−) supply. Carpobrotus rossii accumulated three times more Cd than S. nigrum. However, Cd speciation in the plants was not influenced by N form, but it did vary with species and tissues. In C. rossii, up to 91% of Cd was bound to S-containing ligands in all tissues except the xylem sap where 87–95% were Cd-OH complexes. Furthermore, the proportion of Cd-S in shoots was substantially lower in S. nigrum (44–69%) than in C. rossii (60–91%). It is concluded that the application of NH(4) (+) (instead of NO(3) (−)) increased shoot Cd accumulation by increasing uptake and translocation, rather than changing Cd speciation, and is potentially an effective approach for increasing Cd phytoextraction. |
format | Online Article Text |
id | pubmed-5014155 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-50141552016-09-09 Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation Cheng, Miaomiao Wang, Peng Kopittke, Peter M. Wang, Anan Sale, Peter W.G. Tang, Caixian J Exp Bot Research Paper Nitrogen fertilization could improve the efficiency of Cd phytoextraction in contaminated soil and thus shorten the remediation time. However, limited information is available on the effect of N form on Cd phytoextraction and associated mechanisms in plants. This study examined the effect of N form on Cd accumulation, translocation, and speciation in Carpobrotus rossii and Solanum nigrum. Plants were grown in nutrient solution with 5–15 μM Cd in the presence of 1000 µM NH(4) (+) or NO(3) (−). Plant growth and Cd uptake were measured, and Cd speciation was analyzed using synchrotron-based X-ray absorption spectroscopy. Shoot Cd accumulation was 30% greater with NH(4) (+) than NO(3) (−) supply. Carpobrotus rossii accumulated three times more Cd than S. nigrum. However, Cd speciation in the plants was not influenced by N form, but it did vary with species and tissues. In C. rossii, up to 91% of Cd was bound to S-containing ligands in all tissues except the xylem sap where 87–95% were Cd-OH complexes. Furthermore, the proportion of Cd-S in shoots was substantially lower in S. nigrum (44–69%) than in C. rossii (60–91%). It is concluded that the application of NH(4) (+) (instead of NO(3) (−)) increased shoot Cd accumulation by increasing uptake and translocation, rather than changing Cd speciation, and is potentially an effective approach for increasing Cd phytoextraction. Oxford University Press 2016-09 2016-07-06 /pmc/articles/PMC5014155/ /pubmed/27385767 http://dx.doi.org/10.1093/jxb/erw270 Text en © The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Paper Cheng, Miaomiao Wang, Peng Kopittke, Peter M. Wang, Anan Sale, Peter W.G. Tang, Caixian Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title | Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title_full | Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title_fullStr | Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title_full_unstemmed | Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title_short | Cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
title_sort | cadmium accumulation is enhanced by ammonium compared to nitrate in two hyperaccumulators, without affecting speciation |
topic | Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014155/ https://www.ncbi.nlm.nih.gov/pubmed/27385767 http://dx.doi.org/10.1093/jxb/erw270 |
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