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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erq383
|2 doi
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|a pubmed24n0680.xml
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|a (NLM)21127026
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Ueno, Daisei
|e verfasserin
|4 aut
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|a Physiological, genetic, and molecular characterization of a high-Cd-accumulating rice cultivar, Jarjan
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|c 2011
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 08.08.2011
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|a Date Revised 19.11.2015
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Cadmium (Cd) in rice is a major source of Cd intake for people on a staple rice diet. The mechanisms underlying Cd accumulation in rice plant are still poorly understood. Here, we characterized the physiology and genetics of Cd transport in a high-Cd-accumulating cultivar (Jarjan) of rice (Oryza sativa). Jarjan showed 5- to 34-fold higher Cd accumulation in the shoots and grains than the cultivar Nipponbare, when it was grown in either a non-Cd-contaminated or a Cd-contaminated soil. A short-term uptake experiment showed no significant difference in Cd uptake by the roots between the two cultivars. However, Jarjan translocated 49% of the total Cd taken up to the shoots, whereas Nipponbare retained most of the Cd in the roots. In both concentration- and time-dependent experiments, Jarjan showed a superior capacity for root-to-shoot translocation of Cd. These results indicate that the high-Cd-accumulation phenotype in Jarjan results from efficient translocation of Cd from roots to shoots. Genetic analysis using an F(2) population derived from Jarjan and Nipponbare revealed that plants showing high- and low-Cd-accumulation phenotypes segregated in a 1:3 ratio, indicating that high accumulation in Jarjan is controlled by a single recessive gene. Furthermore, we isolated OsHMA3, a gene encoding a tonoplast-localized Cd transporter from Jarjan. The OsHMA3 protein was localized in all roots cells, but the sequence has a mutation leading to loss of function. Therefore, failure to sequester Cd into the root vacuoles by OsHMA3 is probably responsible for high Cd accumulation in Jarjan
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cation Transport Proteins
|2 NLM
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|a Plant Proteins
|2 NLM
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|a Soil Pollutants
|2 NLM
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|a Cadmium
|2 NLM
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|a 00BH33GNGH
|2 NLM
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|a Koyama, Emi
|e verfasserin
|4 aut
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|a Yamaji, Naoki
|e verfasserin
|4 aut
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| 700 |
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|a Ma, Jian Feng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 62(2011), 7 vom: 15. Apr., Seite 2265-72
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:62
|g year:2011
|g number:7
|g day:15
|g month:04
|g pages:2265-72
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|u http://dx.doi.org/10.1093/jxb/erq383
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