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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
05/12/2017 |
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Data da última atualização: |
11/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FONTES, D.; CORDEIRO, R. C.; MARTINS, G. S.; BEHLING, H.; TURCQ, B.; SIFEDDINE, A.; SEOANE, J. C. S.; MOREIRA, L. S.; RODRIGUES, R. de A. R. |
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Afiliação: |
D. FONTES, UFF; R. C. CORDEIRO, UFF; G. S. MARTINS, UFF; H. BEHLING, Georg-August-University of Göttingen; B. TURCQ, IRD, UPMC, UFF, Uantof, UPCH; A. SIFEDDINE, IRD, UPMC, UFF, Uantof, UPCH; J. C. S. SEOANE, UFRJ; L. S. MOREIRA, UFF; RENATO DE ARAGAO RIBEIRO RODRIGUES, CNPS. |
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Título: |
Paleoenvironmental dynamics in South Amazonia, Brazil, during the last 35,000 years inferred from pollen and geochemical records of Lago do Saci. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Quaternary Science Reviews, v. 173, p. 161-180, Oct. 2017. |
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DOI: |
https://doi.org/10.1016/j.quascirev.2017.08.021 |
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Idioma: |
Inglês |
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Conteúdo: |
Paleoenvironmental changes for the last 35,000 years were reconstructed from palynological, sedimentological and organic geochemical evidence from a well-dated sediment core from Lago do Saci (South Amazonia). Dry climatic conditions occurred between 35,000 and 18,200 cal yr BP as recorded by high frequencies of open savanna taxa and low lake level indicated by Sagittaria and low Total Organic Carbon content. Cold temperatures are indicated by the presence of Podocarpus and Ilex. A sedimentation hiatus observed between 18,200 and 9200 cal yr BP was likely related to dry conditions. The beginning of the Holocene was marked by rainforest expansion and an increase in carbon content that represented high lake levels and warmer and wetter climate conditions. Between 7500 and 5000 cal yr BP, the expansion of open savanna, seasonal forest elements and abundant black carbon suggests a dry phase. After 5000 cal yr BP, rainforest expansion and higher lake levels indicate a return to wetter conditions. A reduction of flooding taxa (Celtis and Mauritia) between 1800 and 1300 cal yr BP, high lake level conditions and maintenance of a forest physiognomy, suggests a decrease of regional precipitation and subsequent reduction of the flooded areas in a still humid climate regime. |
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Palavras-Chave: |
Holoceno; Paleoambiente; Proxies geoquímicos; Sul da Amazônia. |
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Thesagro: |
Pólen. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02197naa a2200289 a 4500
001 2081607
005 2021-11-11
008 2017 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.quascirev.2017.08.021$2DOI
100 1 $aFONTES, D.
245 $aPaleoenvironmental dynamics in South Amazonia, Brazil, during the last 35,000 years inferred from pollen and geochemical records of Lago do Saci.$h[electronic resource]
260 $c2017
520 $aPaleoenvironmental changes for the last 35,000 years were reconstructed from palynological, sedimentological and organic geochemical evidence from a well-dated sediment core from Lago do Saci (South Amazonia). Dry climatic conditions occurred between 35,000 and 18,200 cal yr BP as recorded by high frequencies of open savanna taxa and low lake level indicated by Sagittaria and low Total Organic Carbon content. Cold temperatures are indicated by the presence of Podocarpus and Ilex. A sedimentation hiatus observed between 18,200 and 9200 cal yr BP was likely related to dry conditions. The beginning of the Holocene was marked by rainforest expansion and an increase in carbon content that represented high lake levels and warmer and wetter climate conditions. Between 7500 and 5000 cal yr BP, the expansion of open savanna, seasonal forest elements and abundant black carbon suggests a dry phase. After 5000 cal yr BP, rainforest expansion and higher lake levels indicate a return to wetter conditions. A reduction of flooding taxa (Celtis and Mauritia) between 1800 and 1300 cal yr BP, high lake level conditions and maintenance of a forest physiognomy, suggests a decrease of regional precipitation and subsequent reduction of the flooded areas in a still humid climate regime.
650 $aPólen
653 $aHoloceno
653 $aPaleoambiente
653 $aProxies geoquímicos
653 $aSul da Amazônia
700 1 $aCORDEIRO, R. C.
700 1 $aMARTINS, G. S.
700 1 $aBEHLING, H.
700 1 $aTURCQ, B.
700 1 $aSIFEDDINE, A.
700 1 $aSEOANE, J. C. S.
700 1 $aMOREIRA, L. S.
700 1 $aRODRIGUES, R. de A. R.
773 $tQuaternary Science Reviews$gv. 173, p. 161-180, Oct. 2017.
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Registro original: |
Embrapa Solos (CNPS) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Milho e Sorgo. |
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Data corrente: |
10/07/2017 |
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Data da última atualização: |
24/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RIBEIRO, A. P.; SOUZA, W. R. de; MARTINS, P. K.; VINECKY, F.; DUARTE, K. E.; BASSO, M. F.; DIAS, B. B. A.; CAMPANHA, R. B.; OLIVEIRA, P. A. de; CENTENO, D. C.; CANÇADO, G. M. de A.; MAGALHÃES, J. V. de; SOUSA, C. A. F. de; ANDRADE, A. C.; KOBAYASHI, A. K.; MOLINARI, H. B. C. |
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Afiliação: |
WAGNER R. DE SOUZA, UFLA; POLYANA K. MARTINS, UFLA; FELIPE VINECKY, UFLA; KAROLINE E. DUARTE, UFLA; MARCOS F. BASSO, UFLA; BARBARA ANDRADE DIAS BRITO DA CUNHA, CNPAE; RAQUEL BOMBARDA CAMPANHA, CNPAE; PATRICIA ABRAO DE OLIVEIRA, CNPAE; DANILO C. CENTENO, UFABC; GERALDO MAGELA DE ALMEIDA CANCADO, CNPTIA; JURANDIR VIEIRA DE MAGALHAES, CNPMS; CARLOS A. F. DE SOUSA, UFLA; ALAN CARVALHO ANDRADE, SAPC; ADILSON KENJI KOBAYASHI, CNPAE; HUGO BRUNO CORREA MOLINARI, CNPAE. |
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Título: |
Overexpression of BdMATE gene improves aluminum tolerance in Setaria viridis. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Frontiers in Plant Science, v. 8, p. 1-12, June 2017. |
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Páginas: |
12 p. |
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DOI: |
10.3389/fpls.2017.00865 |
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Idioma: |
Inglês |
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Conteúdo: |
Acidic soils are distributed worldwide, predominantly in tropical and subtropical areas,reaching around 50% of the arable soil. This type of soil strongly reduces crop production, mainly because of the presence of aluminum, which has its solubility increased at low pH levels. A well-known physiological mechanism used by plants to cope with Al stress involves activation of membrane transporters responsible for organic acid anions secretion from the root apex to the rhizosphere, which chelate Al, preventing its absorption by roots. In sorghum, a membrane transporter gene belonging to multidrug and toxic compound extrusion (MATE) family was identified and characterized as an aluminum-activated citrate transporter gene responsible for Al tolerance in this crop. Setaria viridis is an emerging model for C4 species and it is an important model to validate some genes for further C4 crops transformation, such as sugarcane, maize, and wheat. In the present work, Setaria viridis was used as a model plant to overexpress a newly identified MATE gene from Brachypodium distachyon(BdMATE), closely related to SbMATE, for aluminum tolerance assays. Transgenic S. viridis plants overexpressing a BdMATE presented an improved Al tolerance phenotype, characterized by sustained root growth and exclusion of aluminum from the root apex in transgenic plants, as confirmed by hematoxylin assay. In addition, transgenic plants showed higher root citrate exudation into the rhizosphere, suggesting that Al tolerance improvement in these plants could be related to the chelation of the metal by the organic acid anion. These results suggest that BdMATE gene can be used to transform C4 crops of economic importance with improved aluminum tolerance. MenosAcidic soils are distributed worldwide, predominantly in tropical and subtropical areas,reaching around 50% of the arable soil. This type of soil strongly reduces crop production, mainly because of the presence of aluminum, which has its solubility increased at low pH levels. A well-known physiological mechanism used by plants to cope with Al stress involves activation of membrane transporters responsible for organic acid anions secretion from the root apex to the rhizosphere, which chelate Al, preventing its absorption by roots. In sorghum, a membrane transporter gene belonging to multidrug and toxic compound extrusion (MATE) family was identified and characterized as an aluminum-activated citrate transporter gene responsible for Al tolerance in this crop. Setaria viridis is an emerging model for C4 species and it is an important model to validate some genes for further C4 crops transformation, such as sugarcane, maize, and wheat. In the present work, Setaria viridis was used as a model plant to overexpress a newly identified MATE gene from Brachypodium distachyon(BdMATE), closely related to SbMATE, for aluminum tolerance assays. Transgenic S. viridis plants overexpressing a BdMATE presented an improved Al tolerance phenotype, characterized by sustained root growth and exclusion of aluminum from the root apex in transgenic plants, as confirmed by hematoxylin assay. In addition, transgenic plants showed higher root citrate exudation into the rhizosphere, suggesting that Al t... Mostrar Tudo |
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Palavras-Chave: |
BdMate; Hydroponic system; Organismo geneticamente modificado; Tolerância ao alumínio. |
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Thesagro: |
Aluminio. |
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Thesaurus NAL: |
Abiotic stress; Aluminum; Genetically modified organisms; Setaria viridis. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02981naa a2200433 a 4500
001 2080632
005 2018-01-24
008 2017 bl uuuu u00u1 u #d
024 7 $a10.3389/fpls.2017.00865$2DOI
100 1 $aRIBEIRO, A. P.
245 $aOverexpression of BdMATE gene improves aluminum tolerance in Setaria viridis.$h[electronic resource]
260 $c2017
300 $a12 p.
520 $aAcidic soils are distributed worldwide, predominantly in tropical and subtropical areas,reaching around 50% of the arable soil. This type of soil strongly reduces crop production, mainly because of the presence of aluminum, which has its solubility increased at low pH levels. A well-known physiological mechanism used by plants to cope with Al stress involves activation of membrane transporters responsible for organic acid anions secretion from the root apex to the rhizosphere, which chelate Al, preventing its absorption by roots. In sorghum, a membrane transporter gene belonging to multidrug and toxic compound extrusion (MATE) family was identified and characterized as an aluminum-activated citrate transporter gene responsible for Al tolerance in this crop. Setaria viridis is an emerging model for C4 species and it is an important model to validate some genes for further C4 crops transformation, such as sugarcane, maize, and wheat. In the present work, Setaria viridis was used as a model plant to overexpress a newly identified MATE gene from Brachypodium distachyon(BdMATE), closely related to SbMATE, for aluminum tolerance assays. Transgenic S. viridis plants overexpressing a BdMATE presented an improved Al tolerance phenotype, characterized by sustained root growth and exclusion of aluminum from the root apex in transgenic plants, as confirmed by hematoxylin assay. In addition, transgenic plants showed higher root citrate exudation into the rhizosphere, suggesting that Al tolerance improvement in these plants could be related to the chelation of the metal by the organic acid anion. These results suggest that BdMATE gene can be used to transform C4 crops of economic importance with improved aluminum tolerance.
650 $aAbiotic stress
650 $aAluminum
650 $aGenetically modified organisms
650 $aSetaria viridis
650 $aAluminio
653 $aBdMate
653 $aHydroponic system
653 $aOrganismo geneticamente modificado
653 $aTolerância ao alumínio
700 1 $aSOUZA, W. R. de
700 1 $aMARTINS, P. K.
700 1 $aVINECKY, F.
700 1 $aDUARTE, K. E.
700 1 $aBASSO, M. F.
700 1 $aDIAS, B. B. A.
700 1 $aCAMPANHA, R. B.
700 1 $aOLIVEIRA, P. A. de
700 1 $aCENTENO, D. C.
700 1 $aCANÇADO, G. M. de A.
700 1 $aMAGALHÃES, J. V. de
700 1 $aSOUSA, C. A. F. de
700 1 $aANDRADE, A. C.
700 1 $aKOBAYASHI, A. K.
700 1 $aMOLINARI, H. B. C.
773 $tFrontiers in Plant Science$gv. 8, p. 1-12, June 2017.
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