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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
20/01/2006 |
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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: |
KOCHIAN, L. V.; PENCE, N. S.; LETHAM, D. L. D.; PINEROS, M. A.; MAGALHAES, J. V.; HOEKENGA, O. A.; GARVIN, D. F. |
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Afiliação: |
JURANDIR VIEIRA DE MAGALHAES, CNPMS. |
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Título: |
Mechanisms of metal resistance in plants: aluminum and heavy metals. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Plant and Soil, The Hague, v. 247, n.1 , p. 109-119, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Plants have evolved sophisticated mechanisms to deal with toxic levels of metals in the soil. In this paper, an overview of recent progress with regards to understanding fundamental molecular and physiological mechanisms underlying plant resistance to both aluminium (Al) and heavy metals is presented. The discussion of plant Al resistance will focus on recent advances in our understanding of a mechanism based on Al exclusion from the root apex, which is facilitated by Al-activated exudation of organic acid anions. The consideration of heavy metal resistance will focus on research into a metal hyperaccumulating plant species, the Zn/Cd hyperaccumulator, Thlaspi caerulescens, as an example for plant heavy metal research. Based on the specific cases considered in this paper, it appears that quite different strategies are used for Al and heavy metal resistance. For Al, our current understanding of a resistance mechanism based on excluding soil-borne Al from the root apex is presented. For heavy metals, a totally different strategy based on extreme tolerance and metal hyperaccumulation is described for a hyperaccumulator plant species that has evolved on naturally metalliferous soils. The reason these two strategies are the focus of this paper is that, currently, they are the best understood mechanisms of metal resistance in terrestrial plants. However, it is likely that other mechanisms of Al and/or heavy metal resistance are also operating in certain plant species, and there may be common features shared for dealing with Al and heavy resistance. Future research may uncover a number of novel metal resistance mechanisms in plants. Certainly the complex genetics of Al resistance in some crop plant species, such as rice and maize, suggests that a number of presently unidentified mechanisms are part of an overall strategy of metal resistance in crop plants.. MenosPlants have evolved sophisticated mechanisms to deal with toxic levels of metals in the soil. In this paper, an overview of recent progress with regards to understanding fundamental molecular and physiological mechanisms underlying plant resistance to both aluminium (Al) and heavy metals is presented. The discussion of plant Al resistance will focus on recent advances in our understanding of a mechanism based on Al exclusion from the root apex, which is facilitated by Al-activated exudation of organic acid anions. The consideration of heavy metal resistance will focus on research into a metal hyperaccumulating plant species, the Zn/Cd hyperaccumulator, Thlaspi caerulescens, as an example for plant heavy metal research. Based on the specific cases considered in this paper, it appears that quite different strategies are used for Al and heavy metal resistance. For Al, our current understanding of a resistance mechanism based on excluding soil-borne Al from the root apex is presented. For heavy metals, a totally different strategy based on extreme tolerance and metal hyperaccumulation is described for a hyperaccumulator plant species that has evolved on naturally metalliferous soils. The reason these two strategies are the focus of this paper is that, currently, they are the best understood mechanisms of metal resistance in terrestrial plants. However, it is likely that other mechanisms of Al and/or heavy metal resistance are also operating in certain plant species, and there ma... Mostrar Tudo |
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Palavras-Chave: |
Aluminium resistance; Anion channel; Heavy metal transport; Metal hyperaccumulation; Organic acid exudation. |
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Thesaurus Nal: |
gene expression. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02660naa a2200265 a 4500
001 1489104
005 2018-05-30
008 2002 bl uuuu u00u1 u #d
100 1 $aKOCHIAN, L. V.
245 $aMechanisms of metal resistance in plants$baluminum and heavy metals.$h[electronic resource]
260 $c2002
520 $aPlants have evolved sophisticated mechanisms to deal with toxic levels of metals in the soil. In this paper, an overview of recent progress with regards to understanding fundamental molecular and physiological mechanisms underlying plant resistance to both aluminium (Al) and heavy metals is presented. The discussion of plant Al resistance will focus on recent advances in our understanding of a mechanism based on Al exclusion from the root apex, which is facilitated by Al-activated exudation of organic acid anions. The consideration of heavy metal resistance will focus on research into a metal hyperaccumulating plant species, the Zn/Cd hyperaccumulator, Thlaspi caerulescens, as an example for plant heavy metal research. Based on the specific cases considered in this paper, it appears that quite different strategies are used for Al and heavy metal resistance. For Al, our current understanding of a resistance mechanism based on excluding soil-borne Al from the root apex is presented. For heavy metals, a totally different strategy based on extreme tolerance and metal hyperaccumulation is described for a hyperaccumulator plant species that has evolved on naturally metalliferous soils. The reason these two strategies are the focus of this paper is that, currently, they are the best understood mechanisms of metal resistance in terrestrial plants. However, it is likely that other mechanisms of Al and/or heavy metal resistance are also operating in certain plant species, and there may be common features shared for dealing with Al and heavy resistance. Future research may uncover a number of novel metal resistance mechanisms in plants. Certainly the complex genetics of Al resistance in some crop plant species, such as rice and maize, suggests that a number of presently unidentified mechanisms are part of an overall strategy of metal resistance in crop plants..
650 $agene expression
653 $aAluminium resistance
653 $aAnion channel
653 $aHeavy metal transport
653 $aMetal hyperaccumulation
653 $aOrganic acid exudation
700 1 $aPENCE, N. S.
700 1 $aLETHAM, D. L. D.
700 1 $aPINEROS, M. A.
700 1 $aMAGALHAES, J. V.
700 1 $aHOEKENGA, O. A.
700 1 $aGARVIN, D. F.
773 $tPlant and Soil, The Hague$gv. 247, n.1 , p. 109-119, 2002.
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Embrapa Milho e Sorgo (CNPMS) |
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| Registros recuperados : 134 | |
| 4. |  | RIBEIRO, R. A.; DELAMUTA, J. R. M.; HUNGRIA, M. Emprego da metodologia de MLSA em avaliações de filogenia e taxonomia de rizóbios: estudo com Rhizobium spp. Microssimbionte de feijoeiro (Phaseolus vulgaris L.). In: IBEROAMERICAN CONFERENCE ON BENEFICIAL PLANT - MICROORGANISM - ENVIRONMENT INTERACTIONS, 2.; NATIONAL MEETING OF THE SPANISH SOCIETY OF NITROGEN FIXATION, 14.; LATIN AMERICAN MEETING ON RHIZOBIOLOGY, 26.; SPANISH-PROTUGUESE CONGRESS ON NITROGEN FIXATION, 3., 2013, Sevilla. Microorganisms for future agriculture. Sevilla: Universidad de Sevilla; ALAR; SEFIN, 2013. p. 143-144.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 11. | | DELAMUTA, J. R. M.; RIBEIRO, R. A.; HUNGRIA, M. Utilização da técnica de MLSA em estudos taxonômicos e filogenéticos com Bradyrhizobium e sua importância na descrição de novas espécies. In: IBEROAMERICAN CONFERENCE ON BENEFICIAL PLANT - MICROORGANISM - ENVIRONMENT INTERACTIONS, 2.; NATIONAL MEETING OF THE SPANISH SOCIETY OF NITROGEN FIXATION, 14.; LATIN AMERICAN MEETING ON RHIZOBIOLOGY, 26.; SPANISH-PROTUGUESE CONGRESS ON NITROGEN FIXATION, 3., 2013, Sevilla. Microorganisms for future agriculture. Sevilla: Universidad de Sevilla; ALAR; SEFIN, 2013. p. 81-82.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 14. | | RIBEIRO, R. A.; GOMES, D. F.; DELAMUTA, J. R. M.; NOGUEIRA, M. A.; HUNGRIA, M. Análises genômicas na definição de novas espécies. In: REUNIÃO LATINOAMERICANA DE RIZOBIOLOGIA - RELAR, 27., 2016, Londrina. Fortalecendo as parcerias Sul-Sul: anais. Curitiba: SBCS-NEPAR, 2016. p. 130. Editores: Mariangela Hungria, Douglas Fabiano Gomes, Arnaldo Colozzi Filho.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 16. | | DALL'AGNOL, R. F.; DELAMUTA, J. R. M.; RIBEIRO, R. A.; HUNGRIA, M. Diversidade e filogenia de estirpes de Rhizobium pela metodologia de MLSA. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 30.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 14.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 12.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 9.; SIMPÓSIO SOBRE SELÊNIO NO BRASIL, 1., 2012, Maceió. A responsabilidade socioambiental da pesquisa agrícola: anais. Viçosa: SBCS, 2012. 4 p. Trab. 1212. 1 CD-ROM. Fertbio.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 17. | | HELENE, L. C. F.; DELAMUTA, J. R. M.; RIBEIRO, R. A.; HUNGRIA, M. Determinação da filogenia de rizóbios por multilocus sequence analysis (mlsa) com identificação e descrição de novas espécies. In: REUNIÃO LATINOAMERICANA DE RIZOBIOLOGIA - RELAR, 27., 2016, Londrina. Fortalecendo as parcerias Sul-Sul: anais. Curitiba: SBCS-NEPAR, 2016. p. 145. Editores: Mariangela Hungria, Douglas Fabiano Gomes, Arnaldo Colozzi Filho.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 134 | |
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