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Registros recuperados: 51
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A search for RFLP markers to identify genes for aluminum tolerance in maize. Repositório Alice
TORRES, G.A.; PARENTONI, S. N.; LOPES, M.A.; PAIVA, E..
The objective of this study was to identify restriction fragment length polymorphism (RFLP) markers linked to QTLs that control aluminum (Al) tolerance in maize. The strategy used was bulked segregation analysis (BSA) and the genetic material utilized was an F2 population derived from a cross between the Al-susceptible inbred line L53 and Al-tolerant inbred line L1327. Both lines were developed at the National Maize and Sorghum Research Center - CNPMS/EMBRAPA. The F2 population of 1554 individuals was evaluated in a nutrient solution containing a toxic concentration of Al and relative seminal root length (RSRL) was used as a phenotype measured tolerance. The RSRL frequency distribution was continuous, but skewed towards Al-susceptible individuals....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Aluminio; Tolerancia; Zea mays; Maize; RFLP; Aluminum; Tolerance.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/478779
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Absorção de nitrato e de amônio por genótipos de milho crescidos na presença e ausência de alumínio. Repositório Alice
ALVES, V. M. C.; PITTA, G.V.E.; OLIVEIRA, C.A. de; FRANCA, C.C.M.; PARENTONI, S. N..
1998
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Milho; Nitrogenio; Aluminio; Toxidez; Tolerancia; Zea mays; Maize; Nitrogen; Aluminum; Toxicity; Tolerance.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/480636
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Al 3+ - Ca2+ INTERACTION IN PLANTS GROWING IN ACID SOILS: AL-PHYTOTOXICITY RESPONSE TO CALCAREOUS AMENDMENTS J. Soil Sci. Plant Nutr.
Meriño-Gergichevich,C; Alberdi,M; Ivanov,A.G; Reyes-Diaz,M.
High aluminum (Al) concentrations as Al3+ represent an important growth and yield limiting factor for crops in acid soils (pH ≤5.5). The most recognized effect of Al-toxicity in plants is observed in roots. However, damages in the upper parts (including stem, leaves and fruits) may also be present. In addition, Al-toxicity triggers an increase in reactive oxygen species (ROS), causing oxidative stress that can damage the roots and chloroplasts, decreasing normal functioning of photo synthetic parameters. Al-toxicity may also increase or inhibit antioxidant activities, which are responsible to scavenge ROS. As result of the negative effects of toxic Al, root metabolic processes, such as water and nutrient absorption, are disturbed with a...
Tipo: Journal article Palavras-chave: Acid soils; Aluminum; Amendments; Calcium; Gypsum.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100003
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Aluminum induces lipid peroxidation and aggregation of human blood platelets BJMBR
Aluminum (Al3+) intoxication is thought to play a major role in the development of Alzheimer's disease and in certain pathologic manifestations arising from long-term hemodialysis. Although the metal does not present redox capacity, it can stimulate tissue lipid peroxidation in animal models. Furthermore, in vitro studies have revealed that the fluoroaluminate complex induces diacylglycerol formation, 43-kDa protein phosphorylation and aggregation. Based on these observations, we postulated that Al3+-induced blood platelet aggregation was mediated by lipid peroxidation. Using chemiluminescence (CL) of luminol as an index of total lipid peroxidation capacity, we established a correlation between lipid peroxidation capacity and platelet aggregation. Al3+...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Aluminum; Lipid peroxidation; Chemiluminescence; Platelet aggregation.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000500005
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Aluminum-induced genes in grass species. Repositório Alice
NODA, R. W.; GUIMARAES, C. T.; GOMES, E. A.; CARNEIRO, N. P.; LANA, U. G. de P.; MAGALHAES, J. V. de; COSTA, M. M. do C.; SILVA, F. R. D.; BRAMMER, S. P.; LÂNGARO, N. C.; CARVALHO, L. J. C. B.; BEVITORI, R.; PURCINO, A. A. C..
bitstream/item/25479/1/Aluminum-induced.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Tolerância a alumínio; Sequence analysis; Genetics; Aluminum; Genes.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/873120
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Antioxidant system response induced by aluminum in two rice cultivars Braz. J. Plant Physiol.
Ribeiro,Cleberson; Cambraia,José; Peixoto,Paulo Henrique Pereira; Fonseca Júnior,Élcio Meira da.
The antioxidant defense system response was evaluated in two rice cultivars (Oryza sativa L.), Fernandes (CNA-1158) and Maravilha (CNA-6843-1), treated with toxic levels of aluminum. After exposure to aluminum we determined plant growth, H2O2 and O2•- contents, lipid peroxidation, antioxidant enzymes activities and ascorbate and dehydroascorbate contents. Al predominantly accumulated in roots of both cultivars but it reduced root and shoot growth only in the Maravilha cultivar. Treatment with aluminum resulted in a reduction of 84 and 60% in the levels of H2O2 in the roots of the cultivars Maravilha and Fernandes, respectively, and of 26% in the levels of O2•- only in the roots of Fernandes cultivar. Increased lipid peroxidation was observed only in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum; Enzymes; Reactive oxygen species; Oryza sativa; Oxidative stress.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000200004
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Assessment of phenotypic indexes for aluminum tolerance in maize using nutrient solution. Repositório Alice
CANÇADO, G.M.A.; MARTINS, P.R.; LOPES, M.A.; PARENTONI, S. N.; OLIVEIRA, A.B..
1998
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Milho; Aluminio; Toxicidade; Zea mays; Maize; Aluminum; Toxicity.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/480593
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Caulim e óxido crômico sob diferentes formas de administração em estudo de consumo e digestibilidade. Repositório Alice
RIBEIRO, C. B.; OLIVEIRA, L. O. F. de; MORAIS, M. da G.; FERNANDES, H. J.; CARNEIRO, M. M. Y.; ROCHA, R. F. A. T.; ROCHA, D. T..
A nutrição animal necessita de metodologias simples que possam ser aplicadas em condições de campo, que sejam capazes de fornecer estimativas válidas de consumo e digestibilidade e que possam Assim a busca por novas substâncias, fornecidas de forma prática, quantificadas por metodologias analíticas simples e de baixo custo em substituição aos indicadores externos (óxido crômico usado como referência) seriam bem aceitas pela comunidade científica. Neste contexto objetivou-se avaliar o fornecimento do óxido crômico via esofágica ou misturado na ração, e o uso do caulim como indicador, sob as mesmas formas de fornecimento, para estimar a produção fecal e digestibilidade, utilizando quatro bovinos machos castrados da raça Holandesa. Foram testados quatro...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Indicador; Produção fecal; Indicator; Fecal production; Alumínio; Fezes; Aluminum; Feces.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100925
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De novo RNA sequencing and analysis of the transcriptome of signalgrass (Urochloa decumbens) roots exposed to aluminum. Repositório Alice
SALGADO, L. R.; LIMA, R.; SANTOS, B. F. dos; SHIRAKAWA, K. T.; VILELA, M. de M.; ALMEIDA, N. F.; PEREIRA, R. M..
Acidic soils occupy a vast area in the world, and the aluminum (Al) in these soils can directly interact with plant cells and tissues to inhibit their growth and reduce yields. The signalgrass Urochloa decumbens cv. Basilisk (syn. Brachiaria decumbens cv. Basilisk), a widely sown tropical forage grass, is recognized for its high productivity under intensive use, vigorous growth, ease of establishment, and good forage value throughout the year, as well as its exceptional adaptation to infertile acid soils. We sequenced the transcriptome from roots of U. decumbens cv. Basilisk under two conditions, with and without Al, using Illumina paired-end sequencing technology and performed de novo assembly of those reads, which yielded 164,920 transcripts. Of these...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: RNA sequencing; Urochloa genus; Aluminum; Brachiaria decumbens; Molecular markers.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079489
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Determination of serum aluminum, platelet aggregation and lipid peroxidation in hemodialyzed patients BJMBR
Neiva,T.J.C.; Benedetti,A.L.; Tanaka,S.M.C.N.; Santos,J.I.; D'Amico,E.A..
Aluminum (Al3+) overload is frequently associated with lipid peroxidation and neurological disorders. Aluminum accumulation is also reported to be related to renal impairment, anemia and other clinical complications in hemodialysis patients. The aim of the present study was to determine the degree of lipid peroxidation, platelet aggregation and serum aluminum in patients receiving regular hemodialytic treatment. The level of plasma lipid peroxidation was evaluated on the basis of thiobarbituric acid reactive substances (TBARS). Mean platelet peroxidation in patients undergoing hemodialysis was significantly higher than in normal controls (2.7 ± 0.03 vs 1.8 ± 0.06 nmol/l, P<0.05). Platelet aggregation and serum aluminum levels were determined by a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum; Peroxidation; Hemodialysis; Platelets.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300009
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Diallel analysis in acid and fertile soils of maize inbred lines differing in their levels of aluminum tolerance and phosphorus efficiency. Repositório Alice
PARENTONI, S. N.; BAHIA, A.F.C.; GAMA, E.E.G.; LOPES, M.A.; GUIMARAES, P. E. O.; SANTOS, M.X..
1996
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Milho; Solo; Aluminio; Nivel; Fosforo; Acido; Soil; Acid; Aluminum; Levels; Phosphorus; Maize.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/472522
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Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto Anais da ABC (AABC)
Souza,Marcelo C. de; Bueno,Paula C.P.; Morellato,Leonor P.C.; Habermann,Gustavo.
The cerrado's flora comprises aluminum-(Al) accumulating and non-accumulating plants, which coexist on acidic and Al-rich soils with low fertility. Despite their existence, the ecological importance or biological strategies of these functional groups have been little explored. We evaluated the leaf flushing patterns of both groups throughout a year; leaf concentrations of N, P, K, Ca, Mg, S, Al, total flavonoids and polyphenols; as well as the specific leaf area (SLA) on young and mature leaves within and between the groups. In Al-accumulating plants, leaf flushed throughout the year, mainly in May and September; for non-accumulating plants, leaf flushing peaked at the dry-wet seasons transition. However, these behaviors could not be associated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum; Community; Herbivory; Mineral nutrition; Phenology; Specific leaf area.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200813
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Efeito da acidez do solo na estatura de plantas de genótipos de triticale. Repositório Alice
WALENDORFF, R. de A.; STRAPASSON, M.; SPIRONELLO, A. N.; NASCIMENTO JUNIOR, A. do.
bitstream/item/204937/1/ID44743-2019MICp43.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Triticale; Acidez do Solo; Alumínio; Resistência Genética; Triticosecale; Acid soils; Aluminum; Genetic resistance.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114554
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Efeito do armazenamento na qualidade fisiológica das sementes de populações de milho cultivadas sob estresses hídrico e mineral. Repositório Alice
GUARÇONI, R.C.; DURÃES, F.O.M.; MAGALHÃES, P.C.; SILVA, R.F. da.
O objetivo deste trabalho foi avaliar o efeito do armazenamento na qualidade fisiológica de sementes de cinco populações de milho submetidas aos estresses de Al no solo e de seca no florescimento. Cinco populações de milho (CMS06, CMS35, CMS36, CMS54 e Milho Metro) foram cultivadas em solos com dois níveis de fertilidade: o primeiro, apresentando alta saturação de bases (V = 67%), e o segundo, alta saturação de Al (m = 54%). As populações de milho foram também submetidas à irrigação plena e à supressão de irrigação durante o florescimento. As sementes obtidas dessas populações foram armazenadas no laboratório de sementes sob condições ambientais. A qualidade fisiológica das sementes foi determinada no início e aos 30, 90 e 210 dias de armazenamento. As...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Alumínio; Solo; Seca; Germinação; Longevidade das sementes; Aluminum; Soil; Drought; Germination; Seed longevity.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/105904
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Efeito do armazenamento na qualidade fisiológica das sementes de populações de milho cultivadas sob estresses hídrico e mineral. Repositório Alice
GUARCONI, R.C.; DURAES, F. O. M.; MAGALHAES, P. C.; SILVA, R.F. da..
O objetivo deste trabalho foi avaliar o efeito do armazenamento na qualidade fisiologica de sementes de cinco populacoes de milho submetidas aos estresses de Al no solo e de seca no florescimento. Cinco populacoes de milho (CMS06, CMS35, CMS36, CMS54 e Milho Metro) foram cultivadas em solos com dois niveis de fertilidade: o primeiro, apresentando alta saturacao de bases (V = 67%), e o segundo, alta saturacao de Al (m = 54%). As populacoes de milho foram tambem submetidas a irrigacao plena e a supressao de irrigacao durante o florescimento. As sementes obtidas dessas populacoes foram armazenadas no laboratorio de sementes sob condicoes ambientais. A qualidade fisiologicas das sementes foi determinada no inicio e aos 30, 90 e 210 dias de armazenamento. As...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Estresse hidrico; Semente; Armazenamento; Aluminio; Solo; Seca; Germinacao; Longevidade; Zea mays; Maize; Seed; Aluminum; Soil; Drought; Germination; Longevity.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/485187
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Estimating gypsum equirement under no-till based on machine learning technique Rev. Ciênc. Agron.
Guimarães,Alaine Margarete; Caires,Eduardo Fávero; Silva,Karine Sato da; Rocha,José Carlos Ferreira da.
Chemical stratification occurs under no-till systems, including pH, considering that higher levels are formed from the soil surface towards the deeper layers. The subsoil acidity is a limiting factor of the yield. Gypsum has been suggested when subsoil acidity limits the crops root growth, i.e., when the calcium (Ca) level is low and/or the aluminum (Al) level is toxic in the subsoil layers. However, there are doubts about the more efficient methods to estimate the gypsum requirement. This study was carried out to develop numerical models to estimate the gypsum requirement in soils under no-till system by the use of Machine Learning techniques. Computational analyses of the dataset were made applying the M5'Rules algorithm, based on regression models. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rule induction; Calcium; Aluminum; Subsoil acidity; Phosphogypsum.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200250
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Genetic and molecular mechanisms of aluminum tolerance in plants. Repositório Alice
SIMOES, C. C.; MELO, J. O.; MAGALHAES, J. V.; GUIMARAES, C. T..
Aluminum (Al) toxicity restricts root growth and agricultural yield in acid soils, which constitute approximately 40% of the potentially arable lands worldwide. The two main mechanisms of Al tolerance in plants are internal detoxification of Al and its exclusion from root cells. Genes encoding membrane transporters and accessory transcription factors, as well as cis-elements that enhance gene expression, are involved in Al tolerance in plants; thus studies of these genes and accessory factors should be the focus of molecular breeding efforts aimed at improving Al tolerance in crops. In this review, we describe the main genetic and molecular studies that led to the identification and cloning of genes associated with Al tolerance in plants. We include recent...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Aluminum; Tolerance; Organic acids; Regulatory factors; QTL.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/940820
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Genetics of aluminum tolerance in maize evaluated in nutrient solution with and without control experiments. Repositório Alice
PARENTONI, S. N.; ALVES, V. M. C.; OLIVEIRA, A. C.; MAGALHAES, J.; COELHO, A. M.; SCHAFFERT, R. E.; GUIMARAES, C. T.; GAMA, E.E.G.; GODOY, C.L.; SANTOS, M.X.; GUIMARAES, P. E. O.; PACHECO, C. A. P.; MEIRELLES, W. F.; RIBEIRO, P.H.E.; PITTA, G.V.E.; BAHIA FILHO, A.F.C..
2003
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Milho; Aluminum; Tolerancia.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/487374
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Gypsum application, soil fertility and cotton root growth Bragantia
Pivetta,Laércio Augusto; Castoldi,Gustavo; Pivetta,Laerte Gustavo; Maia,Suelen Cristina Mendonça; Rosolem,Ciro Antonio.
ABSTRACT Since there is no consensus on phosphogypsum (PG) rates to be used in agriculture, a better understanding of its effects on the soil solution is needed. Cotton root growth was evaluated as related to Al and Ca activity in soil solution affected by PG. The experiment was carried out in rhizotrons filled with30∙dm–3 of soil. PG rates were estimated by multiplying the soil clay content by 0.0, 1.5, 3.0, 6.0 and 12.0, and it was mixed to the sub-soil.In the upper soil layer, limestone was applied. After 90 days, samples were taken for analysis, and cotton was planted. After27 days, plants were harvested. PG increased soil pH and decreased Al content and activity. Without PG, dissolved organic carbon concentration was high in the soil solution, which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum; Dissolved organic carbon; Soil chemistry.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200264
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Identification, utilization, and economic impact of maize germplasm tolerant to low levels of phosphorus and toxic levels of exchangeable aluminum in brazilian soils. Repositório Alice
MAGNAVACA, R.; BAHIA FILHO, A.F.C..
1996
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Maize; Germplasm; Soils; Acid; Phosphorus; Aluminum; Kinetics; Absorption; Milho; Corn; Germoplasma; Solo acido; Fosforo; Aluminio; Absorcao.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/472506
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