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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
03/03/2009 |
Data da última atualização: |
30/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
LIU, J.; MAGALHAES, J. V.; SHAFF, J.; KOCHIAN, L. |
Afiliação: |
Jiping Liu, Cornell University; JURANDIR VIEIRA DE MAGALHAES, CNPMS; Jon E. Shaff, Cornell University; Leon V. Kochian, Cornell University. |
Título: |
Aluminum-activated citrate and malate transporters from the MATE and ALMT families function independently to confer Arabidopsis aluminum tolerance. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
The Plant Journal, Malden, v. 57, n. 3, p. 389-399, 2009. |
DOI: |
10.1111/j.1365-313X.2008.03696.x |
Idioma: |
Inglês |
Conteúdo: |
Aluminum-activated root malate and citrate exudation play an important role in plant Al tolerance. This paper characterizes AtMATE, a homolog of the recently discovered sorghum and barley Al-tolerance genes, shown here to encode an Al-activated citrate transporter in Arabidopsis. Together with the previously characterized Al-activated malate transporter, AtALMT1, this discovery allowed us to examine the relationship in the same species between members of the two gene families for which Al-tolerance genes have been identified. AtMATE is expressed primarily in roots and is induced by Al. An AtMATE T-DNA knockdown line exhibited very low AtMATE expression and Al-activated root citrate exudation was abolished. The AtALMT1 AtMATE double mutant lacked both Al-activated root malate and citrate exudation and showed greater Al sensitivity than the AtALMT1 mutant. Therefore, although AtALMT1 is a major contributor to Arabidopsis Al tolerance, AtMATE also makes a significant but smaller contribution. The expression patterns of AtALMT1 and AtMATE and the profiles of Al-activated root citrate and malate exudation are not affected by the presence or absence of the other gene. These results suggest that AtALMT1-mediated malate exudation and AtMATE-mediated citrate exudation evolved independently to confer Al tolerance in Arabidopsis. However, a link between regulation of expression of the two transporters in response to Al was identified through work on STOP1, a transcription factor that was previously shown to be necessary for AtALMT1 expression. Here we show that STOP1 is also required for AtMATE expression and Al-activated citrate exudation. MenosAluminum-activated root malate and citrate exudation play an important role in plant Al tolerance. This paper characterizes AtMATE, a homolog of the recently discovered sorghum and barley Al-tolerance genes, shown here to encode an Al-activated citrate transporter in Arabidopsis. Together with the previously characterized Al-activated malate transporter, AtALMT1, this discovery allowed us to examine the relationship in the same species between members of the two gene families for which Al-tolerance genes have been identified. AtMATE is expressed primarily in roots and is induced by Al. An AtMATE T-DNA knockdown line exhibited very low AtMATE expression and Al-activated root citrate exudation was abolished. The AtALMT1 AtMATE double mutant lacked both Al-activated root malate and citrate exudation and showed greater Al sensitivity than the AtALMT1 mutant. Therefore, although AtALMT1 is a major contributor to Arabidopsis Al tolerance, AtMATE also makes a significant but smaller contribution. The expression patterns of AtALMT1 and AtMATE and the profiles of Al-activated root citrate and malate exudation are not affected by the presence or absence of the other gene. These results suggest that AtALMT1-mediated malate exudation and AtMATE-mediated citrate exudation evolved independently to confer Al tolerance in Arabidopsis. However, a link between regulation of expression of the two transporters in response to Al was identified through work on STOP1, a transcription factor that w... Mostrar Tudo |
Palavras-Chave: |
ALMT; Aluminum tolerance; Aluminum toxicity; Multi-drug; Organic cid exudation; Plasma membrane protein; Toxic compound extrusion; Transporter protein. |
Categoria do assunto: |
S Ciências Biológicas |
Marc: |
LEADER 02515naa a2200265 a 4500 001 1491791 005 2018-05-30 008 2009 bl uuuu u00u1 u #d 024 7 $a10.1111/j.1365-313X.2008.03696.x$2DOI 100 1 $aLIU, J. 245 $aAluminum-activated citrate and malate transporters from the MATE and ALMT families function independently to confer Arabidopsis aluminum tolerance.$h[electronic resource] 260 $c2009 520 $aAluminum-activated root malate and citrate exudation play an important role in plant Al tolerance. This paper characterizes AtMATE, a homolog of the recently discovered sorghum and barley Al-tolerance genes, shown here to encode an Al-activated citrate transporter in Arabidopsis. Together with the previously characterized Al-activated malate transporter, AtALMT1, this discovery allowed us to examine the relationship in the same species between members of the two gene families for which Al-tolerance genes have been identified. AtMATE is expressed primarily in roots and is induced by Al. An AtMATE T-DNA knockdown line exhibited very low AtMATE expression and Al-activated root citrate exudation was abolished. The AtALMT1 AtMATE double mutant lacked both Al-activated root malate and citrate exudation and showed greater Al sensitivity than the AtALMT1 mutant. Therefore, although AtALMT1 is a major contributor to Arabidopsis Al tolerance, AtMATE also makes a significant but smaller contribution. The expression patterns of AtALMT1 and AtMATE and the profiles of Al-activated root citrate and malate exudation are not affected by the presence or absence of the other gene. These results suggest that AtALMT1-mediated malate exudation and AtMATE-mediated citrate exudation evolved independently to confer Al tolerance in Arabidopsis. However, a link between regulation of expression of the two transporters in response to Al was identified through work on STOP1, a transcription factor that was previously shown to be necessary for AtALMT1 expression. Here we show that STOP1 is also required for AtMATE expression and Al-activated citrate exudation. 653 $aALMT 653 $aAluminum tolerance 653 $aAluminum toxicity 653 $aMulti-drug 653 $aOrganic cid exudation 653 $aPlasma membrane protein 653 $aToxic compound extrusion 653 $aTransporter protein 700 1 $aMAGALHAES, J. V. 700 1 $aSHAFF, J. 700 1 $aKOCHIAN, L. 773 $tThe Plant Journal, Malden$gv. 57, n. 3, p. 389-399, 2009.
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8. | | OLIVEIRA, P. P. A.; LÉDO, F. J. da S. Uso de alfafa para pastejo bovino. In: MITTELMANN, A.; LÉDO, F. J. da S.; GOMES, J. F. (ed.). Tecnologias para a produção de alfafa no Rio Grande do Sul. Pelotas: Embrapa Clima Temperado; Juiz de Fora: Embrapa Gado de Leite, 2008. p. 33-56.Tipo: Capítulo em Livro Técnico-Científico |
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10. | | PEREIRA, A. V.; MORENZ, M. J. F.; LEDO, F. J. da S.; FERREIRA, R. de P. Capim-elefante: versatilidades de usos na pecuária de leite. In: VILELA, D.; FERREIRA, R. de P.; FERNANDES, E. N.; JUNTOLLI, F. V. (Ed.). Pecuária de leite no Brasil: cenários e avanços tecnológicos. Brasília, DF: Embrapa, 2016. p. 187-211.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Gado de Leite; Embrapa Pecuária Sudeste. |
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12. | | LEDO, F. J. da S.; SOUSA, J. A. de; SIVIERO, A.; SILVA, M. R. Avaliação de cultivares de alface (Lactuca sativa L.), para o período seco no Acre. In: CONGRESSO BRASILEIRO DE OLERICULTURA, 37., 1997, Manaus, AM. Resumos... Manaus: SOB, 1997. R.136. 1 p.Tipo: Resumo em Anais de Congresso |
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