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Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice
Physiological properties involved in divergent cadmium (Cd) accumulation among rice genotypes were characterized using the indica cultivar ‘Habataki’ (high Cd in grains) and the japonica cultivar ‘Sasanishiki’ (low Cd in grains). Time-dependence and concentration-dependence of symplastic Cd absorpti...
Autores principales: | , , , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2692013/ https://www.ncbi.nlm.nih.gov/pubmed/19401409 http://dx.doi.org/10.1093/jxb/erp119 |
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author | Uraguchi, Shimpei Mori, Shinsuke Kuramata, Masato Kawasaki, Akira Arao, Tomohito Ishikawa, Satoru |
author_facet | Uraguchi, Shimpei Mori, Shinsuke Kuramata, Masato Kawasaki, Akira Arao, Tomohito Ishikawa, Satoru |
author_sort | Uraguchi, Shimpei |
collection | PubMed |
description | Physiological properties involved in divergent cadmium (Cd) accumulation among rice genotypes were characterized using the indica cultivar ‘Habataki’ (high Cd in grains) and the japonica cultivar ‘Sasanishiki’ (low Cd in grains). Time-dependence and concentration-dependence of symplastic Cd absorption in roots were revealed not to be responsible for the different Cd accumulation between the two cultivars because root Cd uptake was not greater in the Cd-accumulating cultivar ‘Habataki’ compared with ‘Sasanishiki’. On the other hand, rapid and greater root-to-shoot Cd translocation was observed in ‘Habataki’, which could be mediated by higher abilities in xylem loading of Cd and transpiration rate as a driving force. To verify whether different abilities in xylem-mediated shoot-to-root translocation generally account for the genotypic variation in shoot Cd accumulation in rice, the world rice core collection, consisting of 69 accessions which covers the genetic diversity of almost 32 000 accessions of cultivated rice, was used. The results showed strong correlation between Cd levels in xylem sap and shoots and grains among the 69 rice accessions. Overall, the results presented in this study revealed that the root-to-shoot Cd translocation via the xylem is the major and common physiological process determining the Cd accumulation level in shoots and grains of rice plants. |
format | Text |
id | pubmed-2692013 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-26920132009-06-09 Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice Uraguchi, Shimpei Mori, Shinsuke Kuramata, Masato Kawasaki, Akira Arao, Tomohito Ishikawa, Satoru J Exp Bot Research Papers Physiological properties involved in divergent cadmium (Cd) accumulation among rice genotypes were characterized using the indica cultivar ‘Habataki’ (high Cd in grains) and the japonica cultivar ‘Sasanishiki’ (low Cd in grains). Time-dependence and concentration-dependence of symplastic Cd absorption in roots were revealed not to be responsible for the different Cd accumulation between the two cultivars because root Cd uptake was not greater in the Cd-accumulating cultivar ‘Habataki’ compared with ‘Sasanishiki’. On the other hand, rapid and greater root-to-shoot Cd translocation was observed in ‘Habataki’, which could be mediated by higher abilities in xylem loading of Cd and transpiration rate as a driving force. To verify whether different abilities in xylem-mediated shoot-to-root translocation generally account for the genotypic variation in shoot Cd accumulation in rice, the world rice core collection, consisting of 69 accessions which covers the genetic diversity of almost 32 000 accessions of cultivated rice, was used. The results showed strong correlation between Cd levels in xylem sap and shoots and grains among the 69 rice accessions. Overall, the results presented in this study revealed that the root-to-shoot Cd translocation via the xylem is the major and common physiological process determining the Cd accumulation level in shoots and grains of rice plants. Oxford University Press 2009-07 2009-04-28 /pmc/articles/PMC2692013/ /pubmed/19401409 http://dx.doi.org/10.1093/jxb/erp119 Text en © 2009 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details) |
spellingShingle | Research Papers Uraguchi, Shimpei Mori, Shinsuke Kuramata, Masato Kawasaki, Akira Arao, Tomohito Ishikawa, Satoru Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title | Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title_full | Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title_fullStr | Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title_full_unstemmed | Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title_short | Root-to-shoot Cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
title_sort | root-to-shoot cd translocation via the xylem is the major process determining shoot and grain cadmium accumulation in rice |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2692013/ https://www.ncbi.nlm.nih.gov/pubmed/19401409 http://dx.doi.org/10.1093/jxb/erp119 |
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