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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
03/03/2009 |
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Data da última atualização: |
30/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIU, J.; MAGALHAES, J. V.; SHAFF, J.; KOCHIAN, L. |
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Afiliação: |
Jiping Liu, Cornell University; JURANDIR VIEIRA DE MAGALHAES, CNPMS; Jon E. Shaff, Cornell University; Leon V. Kochian, Cornell University. |
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Título: |
Aluminum-activated citrate and malate transporters from the MATE and ALMT families function independently to confer Arabidopsis aluminum tolerance. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
The Plant Journal, Malden, v. 57, n. 3, p. 389-399, 2009. |
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DOI: |
10.1111/j.1365-313X.2008.03696.x |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
ALMT; Aluminum tolerance; Aluminum toxicity; Multi-drug; Organic cid exudation; Plasma membrane protein; Toxic compound extrusion; Transporter protein. |
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Categoria do assunto: |
S Ciências Biológicas |
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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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Embrapa Milho e Sorgo (CNPMS) |
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| Registros recuperados : 477 | |
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