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Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches

Remans, T ; Nacry, P ; Pervent, M ; Filleur, S ; Diatloff, E ; Mounier, E ; Tillard, P ; Forde, B.G ; Gojon, A

Proceedings of the National Academy of Sciences - PNAS, 2006-12, Vol.103 (50), p.19206-19211 [Peer Reviewed Journal]

United States: National Academy of Sciences

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Title:
Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches
Author: Remans, T ; Nacry, P ; Pervent, M ; Filleur, S ; Diatloff, E ; Mounier, E ; Tillard, P ; Forde, B.G ; Gojon, A
Subjects: Anion Transport Proteins - deficiency ; Anion Transport Proteins - genetics ; Anion Transport Proteins - metabolism ; Arabidopsis ; Arabidopsis - drug effects ; Arabidopsis - genetics ; Arabidopsis - growth & development ; Arabidopsis - metabolism ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - metabolism ; Arabidopsis thaliana ; Biological Sciences ; Botany ; Developmental biology ; gene expression ; Gene Expression Regulation, Plant ; ion transport ; lateral root elongation ; Life Sciences ; Mutation - genetics ; Nitrates ; Nitrates - pharmacology ; nitrites ; nutrient availability ; Phenotype ; Phenotypes ; Plant cells ; Plant growth ; Plant Proteins - genetics ; Plant Proteins - metabolism ; Plant roots ; Plant Roots - drug effects ; Plant Roots - genetics ; Plant Roots - growth & development ; Plant Roots - metabolism ; Plants ; Plants, Genetically Modified ; Root growth ; root primordia ; Root systems ; Root tips ; roots ; Signal Transduction - drug effects ; Transcription Factors - genetics ; Transcription Factors - metabolism ; transporters ; Vegetal Biology
Is Part Of: Proceedings of the National Academy of Sciences - PNAS, 2006-12, Vol.103 (50), p.19206-19211
Notes: http://dx.doi.org/10.1073/pnas.0605275103
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Present address: Institut des Sciences du Végétal, Centre National de la Recherche Scientifique, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
Author contributions: T.R., P.N., B.G.F., and A.G. designed research; T.R., P.N., M.P., S.F., E.D., E.M., and P.T. performed research; T.R., P.N., B.G.F., and A.G. analyzed data; and T.R., P.N., B.G.F., and A.G. wrote the paper.
Present address: Environmental Biology, Agoralaan Building D, Hasselt University, Campus Diepenbeek, 3590 Diepenbeek, Belgium.
Edited by Jocelyn Malamy, University of Chicago, Chicago, IL, and accepted by the Editorial Board October 27, 2006
Description: Localized proliferation of lateral roots in NO₃⁻-rich patches is a striking example of the nutrient-induced plasticity of root development. In Arabidopsis, NO₃⁻ stimulation of lateral root elongation is apparently under the control of a NO₃⁻-signaling pathway involving the ANR1 transcription factor. ANR1 is thought to transduce the NO₃⁻ signal internally, but the upstream NO₃⁻ sensing system is unknown. Here, we show that mutants of the NRT1.1 nitrate transporter display a strongly decreased root colonization of NO₃⁻-rich patches, resulting from reduced lateral root elongation. This phenotype is not due to lower specific NO₃⁻ uptake activity in the mutants and is not suppressed when the NO₃⁻-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 NO₃⁻ signaling pathway, either as a NO₃⁻ sensor or as a facilitator of NO₃⁻ influx into NO₃⁻-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 NO₃⁻-rich zone impairs the efficient acquisition of NO₃⁻ 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 NO₃⁻-sensing system that enables the plant to detect and exploit NO₃⁻-rich soil patches.
Publisher: United States: National Academy of Sciences
Language: English

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Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches

Remans, T ; Nacry, P ; Pervent, M ; Filleur, S ; Diatloff, E ; Mounier, E ; Tillard, P ; Forde, B.G ; Gojon, A

United States: National Academy of Sciences

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