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Registros recuperados: 9
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Change in root apical protein and peroxidase activity in response to aluminum in tolerant and sensitive maize inbred lines Braz. J. Plant Physiol.
Souza,Isabel Regina Prazeres de; Alves,Vera Maria Carvalho; Parentoni,Sidney Netto; Oliveira,Antônio Carlos de; Teixeira,Flávia França; MacAdam,Jennifer Wilson; Purcino,Antônio Álvaro Corsetii.
The effects of a short-term (80 min) exposure to 222 µM aluminum (Al) on the protein content and expression and on peroxidase activity and isoenzymes in the primary root of maize were evaluated. Two inbred lines differing in their level of tolerance to Al were used: Cateto 237 (tolerant) and L36 (sensitive). The apical 20 mm of the primary root was divided into 2-mm-long segments that were analyzed for total protein content and peroxidase activity. These results demonstrate that the total protein content along the root apex was not affected by Al in the tolerant inbred line, but decreased in the sensitive line. In the apical 2 mm of the root of the sensitive line, the expression of low molecular weight proteins (43 kDa or smaller) was decreased. Expression...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum toxicity; Maize; Peroxidase isoforms; Root growth.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000300006
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Enhanced aluminum tolerance in sugarcane: evaluation of SbMATE overexpression and genome-wide identification of ALMTs in Saccharum spp. Repositório Alice
RIBEIRO, A. P.; VINECKY, F.; DUARTE, K. E.; SANTIAGO, T. R.; CASARI, R. A. das C. N.; HELL, A. F.; DIAS, B. B. A.; MARTINS, P. K.; CENTENO, D. da C.; OLIVEIRA, P. A. de; CANÇADO, G. M. de A.; MAGALHAES, J. V. de; KOBAYASHI, A. K.; SOUZA, W. R. de; MOLINARI, H. B. C..
Abstract. Background: A major limiting factor for plant growth is the aluminum (Al) toxicity in acidic soils, especially in tropical regions. The exclusion of Al from the root apex through root exudation of organic acids such as malate and citrate is one of the most ubiquitous tolerance mechanisms in the plant kingdom. Two families of anion channels that confer Al tolerance are well described in the literature, ALMT and MATE family. Results: In this study, sugarcane plants constitutively overexpressing the Sorghum bicolor MATE gene (SbMATE) showed improved tolerance to Al when compared to non-transgenic (NT) plants, characterized by sustained root growth and exclusion of aluminum from the root apex based on the result obtained with hematoxylin staining. In...
Tipo: Artigo de periódico Palavras-chave: Tolerância a alumínio; Toxicidade de alumínio; Estresse abiótico; Sistema hidropônico; ALMT; Aluminum toxicity; Aluminum tolerance; Hydroponic system; Aluminum-activated Malate Transporter family; Multi-drug and Toxic Compound Extrusion; Genome-wide analysis; Cana de Açúcar; Sorghum Bicolor; Mate; Sugarcane; Saccharum; Abiotic stress.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1132688
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Functional antagonism between nitrogen-fixing leguminous trees and calcicole-drought-tolerant trees in the Cerrado Acta Botanica
Meira-Neto,João Augusto Alves; Tolentino,Gláucia Soares; Silva,Maria Carolina Nunes Alves da; Neri,Andreza Viana; Gastauer,Markus; Magnago,Luiz Fernando Silva; Yuste,Jorge Curiel; Valladares,Fernando.
ABSTRACT The Cerrado is the largest savanna of South America and its physiognomy varies from savanna to woodlands. There are two main types of woodlands in the Cerrado: dystrophic woodlands, dominated by N-fixing leguminous trees (LEG), and mesotrophic woodlands dominated by non-leguminous drought-tolerant trees (DRY), which are calcicoles and sensitive to Al3+. The working hypothesis is that LEG and DRY are functional antagonists in terms of the acidification/alkalization processes involving different forms of inorganic nitrogen and pH, Ca2+ and Al3+ in soil. Tree species basal area and soil properties were used to investigate the antagonism between LEG and DRY using generalized linear models. The results suggest that LEG and DRY are antagonists. The LEG...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum toxicity; Calcicole species; Dry forests; Ecosystem function; Nitrogen fixing; Tropical savanna; Woodlands.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100011
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Interactions between magnesium, calcium, and aluminum on soybean root elongation Rev. Bras. Ciênc. Solo
Silva,Ivo Ribeiro da; Ferrufino,Armando; Sanzonowicz,Cláudio; Smyth,Thomas Jot; Israel,Daniel W.; Carter Júnior,Thomas E..
Alleviation of Al rhizotoxicity by Ca and Mg can differ among species and genotypes. Root elongation of soybean [Glycine max (L.) Merr.] line N93-S-179 and cvs. Young and Ransom exposed to varying concentrations of Al, Ca and Mg were compared in two experiments using a vertically split root system. Roots extending from a surface compartment with limed soil grew for 12 days into a subsurface compartment with nutrient solution treatments maintained at pH 4.6 with either 0 or 15 µmol L-1 Al. Calcium and Mg concentrations in treatments ranging from 0 to 20 mmol L-1. Although an adequate supply of Mg was provided in the surface soil compartment for soybean top growth, an inclusion of Mg was necessary in the subsurface solutions to promote root elongation in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cation amelioration; Aluminum toxicity; Root stress; Soil acidity.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000500010
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Nutritional adaptations of native plants of the cerrado biome in acid soils Braz. J. Plant Physiol.
Haridasan,Mundayatan.
Soils of the cerrado biome, mostly oxisols and deep sandy entisols, are acid, dystrophic and poor in available nutrients. These soils are not very different from soils that occur in the Amazon region. However, the open savanna physiognomies of cerrado with lower biomass of their different components are deficient in nutrients at the ecosystem level, unlike the Amazon forests which retain high nutrient reserves in their live biomass. Field crops are susceptible to aluminum and manganese toxicities, besides nutrient deficiencies, in cerrado soils and do not grow well in the absence of liming and fertilization. However, concepts of nutrient deficiencies and toxicities, well established for cultivated plants, should not be extended to native species in natural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum toxicity; Latosol; Mineral nutrition; Soil fertility.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000300003
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Performance of tetraploid alfalfa genotypes as exposed to aluminum toxicity. Repositório Alice
PASSOS, L. P.; KOPP, M. M.; LEDO, F. J. da S..
Tipo: Separatas Palavras-chave: Aluminum toxicity; Genotypes; Nutrient solution; Selection.; Alfalfa..
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/921804
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Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution Braz. J. Plant Physiol.
Tabaldi,Luciane A.; Nicoloso,Fernando T.; Castro,Gabriel Y.; Cargnelutti,Denise; Gonçalves,Jamile F.; Rauber,Renata; Skrebsky,Etiane C.; Schetinger,Maria R.C.; Morsch,Vera M.; Bisognin,Dilson A..
Aluminum toxicity is a serious problem in Brazilian soils and selecting potato clones is an important strategy to produce this crop on these kinds of soils. Potato clones, Macaca, SMIC148-A, Dakota Rose, and Solanum microdontum, were grown in a nutrient solution (pH 4.0) with 0, 50, 100, 150 and 200 mg Al L-1. After 7 d, Al concentration in both root system and shoot of all clones increased linearly with increasing Al levels. Based on relative root growth, S. microdontum and SMIC148-A were considered Al-tolerant clones, whereas Macaca and Dakota Rose were considered Al-sensitive. Shoot growth in Macaca linearly decreased with increasing Al levels. Root H2O2 concentration in both Al-sensitive clones increased with increasing Al supply, whereas in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum toxicity; Antioxidative enzymes; Growth; Oxidative stress; Solanum tuberosum.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000300005
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Tolerance of arabica coffee cultivars for aluminum in nutritive solution BABT
Macedo,Célia Maria Peixoto de; Lopes,José Carlos; Amaral,José Augusto Teixeira do; Fonseca,Aymbiré Francisco Almeida da; Amaral,José Francisco Teixeira do.
This work aimed to evaluate the Coffea arabica cultivars for aluminum toxicity tolerance, in modified Hoagland solution. A completely randomized design with five repetitions in a factorial 4 x 4 (cultivar x combinations of aluminum) was used. After 44 days of the sowing, were transferred ten seedlings each cultivar germinated in the absence of Al3+ to solution without Al3+, and ten for solution with Al3+; ten seedlings each cultivar germinated in presence of Al3+ to solution without Al3+, and ten for solution with Al3+. In the treatment with aluminum, the element was added to the nutritive solution in the concentration of 0.83 mmol L-1 as Al2(SO4)3.16H2O. The cultivars Catuaí Amarelo IAC 62 and Iapar 59 were tolerant to the aluminum; cultivar Oeiras...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Aluminum toxicity; Vigor; Breeding.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500005
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Tolerância ao alumínio em cultivares de aveia branca sob cultivo hidropônico. Repositório Alice
SILVA, J. A. G. da; CARVALHO, F. I. F. de; COIMBRA, J. L. M.; VIEIRA, E. A.; BENIN, G.; OLIVEIRA, A. C. de; FINATTO, T.; BERTAN, I.; SILVA, G. O. da; CORREA, M. R..
O emprego do cultivo hidropônico para avaliar a tolerância à toxicidade pelo alumínio em genótipos de aveia pode ser feito por meio da medida da retomada do crescimento de raiz. Avaliaram-se 12 cultivares de aveia branca indicadas para o cultivo no Sul do Brasil com o intuito de caracterizar a tolerância ao alumínio, de maneira a ser estrategicamente recomendadas e/ou incluídas em blocos de cruzamento na obtenção de constituições genéticas de elevado potencial produtivo e tolerante ao íon metálico. Foram utilizadas doses de 10, 15 e 20 mg L-1 de alumínio na solução hidropônica e o delineamento experimental adotado foi o completamente casualizado, com três repetições, seguindo o esquema fatorial (12 x 3). As doses empregadas são altamente eficientes na...
Tipo: Artigo de periódico Palavras-chave: Variety; Aluminum toxicity; Hidroponia; Toxidez de alumínio; Cultivar.; Aveia; Avena Sativa.; Hydroponics; Oats..
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/571781
Registros recuperados: 9
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