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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
50
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pubmed:dateCreated |
2006-12-13
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pubmed:abstractText |
Localized proliferation of lateral roots in NO(3)(-)-rich patches is a striking example of the nutrient-induced plasticity of root development. In Arabidopsis, NO(3)(-) stimulation of lateral root elongation is apparently under the control of a NO(3)(-)-signaling pathway involving the ANR1 transcription factor. ANR1 is thought to transduce the NO(3)(-) signal internally, but the upstream NO(3)(-) sensing system is unknown. Here, we show that mutants of the NRT1.1 nitrate transporter display a strongly decreased root colonization of NO(3)(-)-rich patches, resulting from reduced lateral root elongation. This phenotype is not due to lower specific NO(3)(-) uptake activity in the mutants and is not suppressed when the NO(3)(-)-rich patch is supplemented with an alternative N source but is associated with dramatically decreased ANR1 expression. These results show that NRT1.1 promotes localized root proliferation independently of any nutritional effect and indicate a role in the ANR1-dependent NO(3)(-) signaling pathway, either as a NO(3)(-) sensor or as a facilitator of NO(3)(-) influx into NO(3)(-)-sensing cells. Consistent with this model, the NRT1.1 and ANR1 promoters both directed reporter gene expression in root primordia and root tips. The inability of NRT1.1-deficient mutants to promote increased lateral root proliferation in the NO(3)(-)-rich zone impairs the efficient acquisition of NO(3)(-) and leads to slower plant growth. We conclude that NRT1.1, which is localized at the forefront of soil exploration by the roots, is a key component of the NO(3)(-)-sensing system that enables the plant to detect and exploit NO(3)(-)-rich soil patches.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10069079,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10205909,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10330471,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10339622,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10417701,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-10449574,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-11165253,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-11487691,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-11553754,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-12606566,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-12753979,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-12953122,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-14671301,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-15319483,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-15509836,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-15667327,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-16021502,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-16040660,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-16157886,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-16229082,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-16415211,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-8453665,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-9159946,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-9430595,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17148611-9844028
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Dec
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pubmed:issn |
0027-8424
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:day |
12
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pubmed:volume |
103
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
19206-11
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pubmed:dateRevised |
2010-9-15
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pubmed:meshHeading |
pubmed-meshheading:17148611-Anion Transport Proteins,
pubmed-meshheading:17148611-Arabidopsis,
pubmed-meshheading:17148611-Arabidopsis Proteins,
pubmed-meshheading:17148611-Gene Expression Regulation, Plant,
pubmed-meshheading:17148611-Mutation,
pubmed-meshheading:17148611-Nitrates,
pubmed-meshheading:17148611-Phenotype,
pubmed-meshheading:17148611-Plant Proteins,
pubmed-meshheading:17148611-Plant Roots,
pubmed-meshheading:17148611-Plants, Genetically Modified,
pubmed-meshheading:17148611-Signal Transduction,
pubmed-meshheading:17148611-Transcription Factors
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pubmed:year |
2006
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pubmed:articleTitle |
The Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches.
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pubmed:affiliation |
Biochimie et Physiologie Moléculaire des Plantes, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, UM2, et AgroM, Place Viala, F-34060 Montpellier, France.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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