Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.
Identifieur interne : 000000 ( Hal/Curation ); suivant : 000001Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.
Auteurs : Gemma Cama Es [Espagne] ; Miguel Cerezo [Espagne] ; Eduardo Primo-Millo [Espagne] ; Alain Gojon [France] ; Pilar García-Agustín [Espagne]Source :
- Planta [ 0032-0935 ] ; 2009-01.
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- mix :
Abstract
Citrus seedlings (Citrus sinensis L. Osbeck x Poncirus trifoliata Blanco) were used to describe the effects of different N treatments on the NH4+ influx mediated by high- and low-affinity transport systems (HATS and LATS, respectively) and CitAMT1 gene expression. Results show that Citrus plants favor NH4+ over NO3- influx mediated by HATS and LATS when both N sources are present in the nutrient solution and Citrus plants display a much higher capacity to take up NH4+ than NO3-. Furthermore, NH4+ exerts a regulatory effect on NH4+ HATS activity and CitAMT1 expression, both are down-regulated by high N status of the plant, but specifically stimulated by NH4+ and the balance between these two opposite effects depends on the prior nutrition regime of the plant. On the other hand, supply of NO3- inhibits CitAMT1 expression but doesn't affect NH4+ HATS activity on the roots. To explain this discrepancy, it is possible that other CitAMT1 transporters, up-regulated by N limitation, but not repressed by NO3- could be involved in the stimulation of NH4+ HATS activity under pure NO3- nutrition or CitAMT1 transporter could be regulated at the post-transcriptional level.
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DOI: 10.1007/s00425-008-0833-y
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type="datePub">2009-01</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Ammonium</term><term>Ammonium transporter</term><term>Citrus</term><term>High-affinity transport system</term><term>Low-affinity transport system</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Citrus seedlings (Citrus sinensis L. Osbeck x Poncirus trifoliata Blanco) were used to describe the effects of different N treatments on the NH4+ influx mediated by high- and low-affinity transport systems (HATS and LATS, respectively) and CitAMT1 gene expression. Results show that Citrus plants favor NH4+ over NO3- influx mediated by HATS and LATS when both N sources are present in the nutrient solution and Citrus plants display a much higher capacity to take up NH4+ than NO3-. Furthermore, NH4+ exerts a regulatory effect on NH4+ HATS activity and CitAMT1 expression, both are down-regulated by high N status of the plant, but specifically stimulated by NH4+ and the balance between these two opposite effects depends on the prior nutrition regime of the plant. On the other hand, supply of NO3- inhibits CitAMT1 expression but doesn't affect NH4+ HATS activity on the roots. To explain this discrepancy, it is possible that other CitAMT1 transporters, up-regulated by N limitation, but not repressed by NO3- could be involved in the stimulation of NH4+ HATS activity under pure NO3- nutrition or CitAMT1 transporter could be regulated at the post-transcriptional level.</div></front></TEI><hal api="V3"><titleStmt><title xml:lang="en">Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.</title><author role="aut"><persName><forename type="first">Gemma</forename><surname>Camañes</surname></persName><email></email><idno type="halauthor">230178</idno><affiliation ref="#struct-49269"></affiliation></author><author role="aut"><persName><forename type="first">Miguel</forename><surname>Cerezo</surname></persName><email></email><idno type="halauthor">230179</idno><affiliation ref="#struct-49269"></affiliation></author><author role="aut"><persName><forename type="first">Eduardo</forename><surname>Primo-Millo</surname></persName><email></email><idno type="halauthor">230180</idno><affiliation ref="#struct-49270"></affiliation></author><author role="aut"><persName><forename type="first">Alain</forename><surname>Gojon</surname></persName><email></email><idno type="halauthor">158103</idno><affiliation ref="#struct-538"></affiliation></author><author role="aut"><persName><forename type="first">Pilar</forename><surname>García-Agustín</surname></persName><email></email><idno type="halauthor">230181</idno><affiliation ref="#struct-49269"></affiliation></author><editor role="depositor"><persName><forename>Chantal</forename><surname>Baracco</surname></persName><email>chantal.baracco@supagro.inra.fr</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2009-08-04 15:08:40</date><date type="whenModified">2016-01-14 01:01:04</date><date type="whenReleased">2009-08-04 15:08:40</date><date type="whenProduced">2009-01</date></edition><respStmt><resp>contributor</resp><name key="103581"><persName><forename>Chantal</forename><surname>Baracco</surname></persName><email>chantal.baracco@supagro.inra.fr</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">hal-00408943</idno><idno type="halUri">https://hal.archives-ouvertes.fr/hal-00408943</idno><idno type="halBibtex">camanes:hal-00408943</idno><idno type="halRefHtml">Planta, Springer Verlag, 2009, 229 (2), pp.331-42. <10.1007/s00425-008-0833-y></idno><idno type="halRef">Planta, Springer Verlag, 2009, 229 (2), pp.331-42. <10.1007/s00425-008-0833-y></idno></publicationStmt><seriesStmt><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="INRA">INRA - Institut national de la recherche agronomique</idno><idno type="stamp" n="BPMP">Biochimie et physiologie moléculaire des plantes</idno><idno type="stamp" n="AGROPOLIS">Agropolis</idno></seriesStmt><notesStmt><note type="audience" n="2">International</note><note type="popular" n="0">No</note><note type="peer" n="1">Yes</note></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.</title><author role="aut"><persName><forename type="first">Gemma</forename><surname>Camañes</surname></persName><idno type="halAuthorId">230178</idno><affiliation ref="#struct-49269"></affiliation></author><author role="aut"><persName><forename type="first">Miguel</forename><surname>Cerezo</surname></persName><idno type="halAuthorId">230179</idno><affiliation ref="#struct-49269"></affiliation></author><author role="aut"><persName><forename type="first">Eduardo</forename><surname>Primo-Millo</surname></persName><idno type="halAuthorId">230180</idno><affiliation ref="#struct-49270"></affiliation></author><author role="aut"><persName><forename type="first">Alain</forename><surname>Gojon</surname></persName><idno type="halAuthorId">158103</idno><affiliation ref="#struct-538"></affiliation></author><author role="aut"><persName><forename type="first">Pilar</forename><surname>García-Agustín</surname></persName><idno type="halAuthorId">230181</idno><affiliation ref="#struct-49269"></affiliation></author></analytic><monogr><idno type="halJournalId" status="VALID">7828</idno><idno type="issn">0032-0935</idno><idno type="eissn">1432-2048</idno><title level="j">Planta</title><imprint><publisher>Springer Verlag</publisher><biblScope unit="volume">229</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="pp">331-42</biblScope><date type="datePub">2009-01</date><date type="dateEpub">2008-11-21</date></imprint></monogr><idno type="doi">10.1007/s00425-008-0833-y</idno><idno type="pubmed">19023591</idno></biblStruct></sourceDesc><profileDesc><langUsage><language ident="en">English</language></langUsage><textClass><keywords scheme="author"><term xml:lang="en">Ammonium</term><term xml:lang="en">Ammonium transporter</term><term xml:lang="en">Citrus</term><term xml:lang="en">High-affinity transport system</term><term xml:lang="en">Low-affinity transport system</term></keywords><classCode scheme="classification">ACL</classCode><classCode scheme="mesh">Biological Transport</classCode><classCode scheme="mesh">Citrus</classCode><classCode scheme="mesh">Quaternary Ammonium Compounds</classCode><classCode scheme="mesh">Solutions</classCode><classCode scheme="mesh">Gene Expression Regulation, Plant</classCode><classCode scheme="mesh">Kinetics</classCode><classCode scheme="mesh">Nitrates</classCode><classCode scheme="mesh">Nitrogen</classCode><classCode scheme="mesh">Organ Specificity</classCode><classCode scheme="mesh">Plant Proteins</classCode><classCode scheme="mesh">Plant Roots</classCode><classCode scheme="mesh">Plant Shoots</classCode><classCode scheme="halDomain" n="sdv.bv">Life Sciences [q-bio]/Vegetal Biology</classCode><classCode scheme="halTypology" n="ART">Journal articles</classCode></textClass><abstract xml:lang="en">Citrus seedlings (Citrus sinensis L. Osbeck x Poncirus trifoliata Blanco) were used to describe the effects of different N treatments on the NH4+ influx mediated by high- and low-affinity transport systems (HATS and LATS, respectively) and CitAMT1 gene expression. Results show that Citrus plants favor NH4+ over NO3- influx mediated by HATS and LATS when both N sources are present in the nutrient solution and Citrus plants display a much higher capacity to take up NH4+ than NO3-. Furthermore, NH4+ exerts a regulatory effect on NH4+ HATS activity and CitAMT1 expression, both are down-regulated by high N status of the plant, but specifically stimulated by NH4+ and the balance between these two opposite effects depends on the prior nutrition regime of the plant. On the other hand, supply of NO3- inhibits CitAMT1 expression but doesn't affect NH4+ HATS activity on the roots. To explain this discrepancy, it is possible that other CitAMT1 transporters, up-regulated by N limitation, but not repressed by NO3- could be involved in the stimulation of NH4+ HATS activity under pure NO3- nutrition or CitAMT1 transporter could be regulated at the post-transcriptional level.</abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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