Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.
Identifieur interne : 001E13 ( Main/Exploration ); précédent : 001E12; suivant : 001E14Ammonium transport and CitAMT1 expression are regulated by N in Citrus plants.
Auteurs : Gemma Cama Es [Espagne] ; Miguel Cerezo ; Eduardo Primo-Millo ; Alain Gojon ; Pilar García-AgustínSource :
- Planta [ 0032-0935 ] ; 2009.
English descriptors
- KwdEn :
- Biological Transport (drug effects), Citrus (drug effects), Citrus (genetics), Gene Expression Regulation, Plant (drug effects), Kinetics, Nitrates (metabolism), Nitrogen (pharmacology), Organ Specificity (drug effects), Plant Proteins (genetics), Plant Proteins (metabolism), Plant Roots (drug effects), Plant Roots (genetics), Plant Roots (metabolism), Plant Shoots (drug effects), Plant Shoots (genetics), Quaternary Ammonium Compounds (metabolism), Solutions.
- MESH :
- chemical , genetics : Plant Proteins.
- chemical , metabolism : Nitrates, Plant Proteins, Quaternary Ammonium Compounds.
- drug effects : Biological Transport, Citrus, Gene Expression Regulation, Plant, Organ Specificity, Plant Roots, Plant Shoots.
- genetics : Citrus, Plant Roots, Plant Shoots.
- metabolism : Plant Roots.
- chemical , pharmacology : Nitrogen.
- Kinetics, Solutions.
- 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.
Url:
DOI: 10.1007/s00425-008-0833-y
PubMed: 19023591
Affiliations:
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Le document en format XML
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sortKey="Cerezo, Miguel" sort="Cerezo, Miguel" uniqKey="Cerezo M" first="Miguel" last="Cerezo">Miguel Cerezo</name></author><author><name sortKey="Primo Millo, Eduardo" sort="Primo Millo, Eduardo" uniqKey="Primo Millo E" first="Eduardo" last="Primo-Millo">Eduardo Primo-Millo</name></author><author><name sortKey="Gojon, Alain" sort="Gojon, Alain" uniqKey="Gojon A" first="Alain" last="Gojon">Alain Gojon</name></author><author><name sortKey="Garcia Agustin, Pilar" sort="Garcia Agustin, Pilar" uniqKey="Garcia Agustin P" first="Pilar" last="García-Agustín">Pilar García-Agustín</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:19023591</idno><idno type="pmid">19023591</idno><idno type="doi">10.1007/s00425-008-0833-y</idno><idno type="wicri:Area/PubMed/Corpus">000A06</idno><idno type="wicri:Area/PubMed/Curation">000A06</idno><idno type="wicri:Area/PubMed/Checkpoint">000A06</idno><idno 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first="Gemma" last="Cama Es">Gemma Cama Es</name><affiliation wicri:level="1"><nlm:affiliation>Laboratorio de Bioquímica y Biotecnología, Area de Fisiología Vegetal, Departamento de Ciencias Agrarias y del Medio Natural, Escuela Superior de Tecnología y Ciencias Experimentales, Universitat Jaume I, 12071, Castellón de la Plana, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Laboratorio de Bioquímica y Biotecnología, Area de Fisiología Vegetal, Departamento de Ciencias Agrarias y del Medio Natural, Escuela Superior de Tecnología y Ciencias Experimentales, Universitat Jaume I, 12071, Castellón de la Plana</wicri:regionArea><wicri:noRegion>Castellón de la Plana</wicri:noRegion></affiliation></author><author><name sortKey="Cerezo, Miguel" sort="Cerezo, Miguel" uniqKey="Cerezo M" first="Miguel" last="Cerezo">Miguel Cerezo</name></author><author><name sortKey="Primo Millo, Eduardo" sort="Primo Millo, Eduardo" uniqKey="Primo Millo E" first="Eduardo" last="Primo-Millo">Eduardo Primo-Millo</name></author><author><name sortKey="Gojon, Alain" sort="Gojon, Alain" uniqKey="Gojon A" first="Alain" last="Gojon">Alain Gojon</name></author><author><name sortKey="Garcia Agustin, Pilar" sort="Garcia Agustin, Pilar" uniqKey="Garcia Agustin P" first="Pilar" last="García-Agustín">Pilar García-Agustín</name></author></analytic><series><title level="j">Planta</title><idno type="ISSN">0032-0935</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport (drug effects)</term><term>Citrus (drug effects)</term><term>Citrus (genetics)</term><term>Gene Expression Regulation, Plant (drug effects)</term><term>Kinetics</term><term>Nitrates (metabolism)</term><term>Nitrogen (pharmacology)</term><term>Organ Specificity (drug effects)</term><term>Plant Proteins (genetics)</term><term>Plant Proteins (metabolism)</term><term>Plant Roots (drug effects)</term><term>Plant Roots (genetics)</term><term>Plant Roots (metabolism)</term><term>Plant Shoots (drug effects)</term><term>Plant Shoots (genetics)</term><term>Quaternary Ammonium Compounds (metabolism)</term><term>Solutions</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Plant Proteins</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Nitrates</term><term>Plant Proteins</term><term>Quaternary Ammonium Compounds</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Biological Transport</term><term>Citrus</term><term>Gene Expression Regulation, Plant</term><term>Organ Specificity</term><term>Plant Roots</term><term>Plant Shoots</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Citrus</term><term>Plant Roots</term><term>Plant Shoots</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Nitrogen</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Kinetics</term><term>Solutions</term></keywords><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><affiliations><list><country><li>Espagne</li></country></list><tree><noCountry><name sortKey="Cerezo, Miguel" sort="Cerezo, Miguel" uniqKey="Cerezo M" first="Miguel" last="Cerezo">Miguel Cerezo</name><name sortKey="Garcia Agustin, Pilar" sort="Garcia Agustin, Pilar" uniqKey="Garcia Agustin P" first="Pilar" last="García-Agustín">Pilar García-Agustín</name><name sortKey="Gojon, Alain" sort="Gojon, Alain" uniqKey="Gojon A" first="Alain" last="Gojon">Alain Gojon</name><name sortKey="Primo Millo, Eduardo" sort="Primo Millo, Eduardo" uniqKey="Primo Millo E" first="Eduardo" last="Primo-Millo">Eduardo Primo-Millo</name></noCountry><country name="Espagne"><noRegion><name sortKey="Cama Es, Gemma" sort="Cama Es, Gemma" uniqKey="Cama Es G" first="Gemma" last="Cama Es">Gemma Cama Es</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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