Mechanisms Of Tolerance To Al
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Initial root length in wheat is highly correlated with acid soil tolerance in the field
ABSTRACT: In acid soils, toxic aluminum ions inhibit plant root growth. In order to discriminate aluminum (Al) tolerance, trustful screening techniques are required. In this study, 20 wheat cultivars, showing different levels of Al tolerance, were evaluated in a short-term soil experiment to access their relative root length (RRL). Moreover, the alleles of t
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-01
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2. Aluminum-induced genes in grass species.
This study aimed to identify genes associated with Al tolerance mechanisms in grasses, using cDNA and subtracitve libraries derived from roots of maize, rice, sorghum, oat, barley, wheat and brachiaria tolerant genotypes submitted to critical levels of Al in nutrient solution.
INTERNATIONAL CONFERENCE OF THE BRAZILIAN ASSOCIATION FOR BIOINFORMATICS AND COMPUTATIONAL BIOLOGY. Publicado em: 2011
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3. Aluminum-induced genes in grass species.
The toxicity caused by aluminum (Al), intrinsic to acid soils, in?uences negatively the stability of crop production. Under toxic levels of Al, plant roots paralyze their development and become unable to explore the deeper layers of the soil, affecting nutrient and water acquisition and reducing crop yield. This study aimed to identify genes associated with
INTERNATIONAL CONFERENCE OF THE BRAZILIAN ASSOCIATION FOR BIOINFORMATICS AND COMPUTATIONAL BIOLOGY. Publicado em: 2011
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4. Defense systems against oxidative stresses in two rice cultivars (Oryza sativa L.) with differential tolerance to aluminum / Sistemas de defesa contra estresses oxidativos em dois cultivares de arroz (Oryza sativa L.) com tolerância diferencial ao alumínio
Aluminum (Al) effects on the growth and enzymatic and non-enzymatic antioxidative mechanisms involved in the scavenging of reactive oxygen species (ROIs) in two rice cultivars: Fernandes (CNA-1158) and Maravilha (CNA-6843-1) with differential tolerance to Al were studied. The plants, grown in pH 4.0 nutrient solution, for ten days in nutrient solution, pH 4,
Publicado em: 2007
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5. Characterization and utilization of genes involved with aluminum tolerance in maize / Caracterização e utilização de genes envolvidos na tolerancia ao aluminio toxico em milho
Acid soils are found worldwide but most of them are located in tropical and subtropical regions. Aluminum (Al), the most abundant metal on the earth surface, becomes soluble in the soil solution as consequence of low pH in acid soils and achieves phytotoxic levels for most of the cultivated plant species. The first symptom of Al toxicity is the inhibition of
Publicado em: 2006
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6. Studies of the aluminum tolerance in upland rice and the effects on the soil-plant interface / Estudos da tolerância ao alumínio em arroz de sequeiro e seus efeitos sobre a interface solo-planta
O objetivo geral deste trabalho foi avaliar a tolerância diferencial de variedades de arroz de sequeiro e seus efeitos sobre a morfofisiologia dos sistemas radiculares, tendo sido estabelecidos os seguintes objetivos específicos: a) estabelecer uma metodologia para quantificar o sistema radicular e suas variantes; b) avaliar o grau das modificações rizom
Publicado em: 2003
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7. Perfil da expressão genica em raizes de milho expostas ao aluminio utilizando macroarrays
Aluminum (Al) is toxic to most plants at micromolar concentrations and decreases crop productivity in large areas in the world. The first and most dramatic symptom of Al toxicity is the inhibition of root growth, which leads to a reduced root system. Consequently, sensitive plants explore a smaller soil surface. The objectives of this work were to establish
Publicado em: 2002
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8. Germinação, crescimento, atividade fotossintetica e translocação de compostos de carbono em especies arboreas tropicais : estudo comparativo e influencia de sombreamento natural
Gennination, growth, photosynthesis and translocation of carbon in tropical tree species: a comparative study and the influence of natural shade. Light has been recognized as a major factor in species replacement during secondary sucession in forests. The degree of shade tolerance may be important in detennining successional sequences, since these are condit
Publicado em: 1996
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9. Identification and Characterization of Aluminum Tolerance Loci in Arabidopsis (Landsberg erecta × Columbia) by Quantitative Trait Locus Mapping. A Physiologically Simple But Genetically Complex Trait1
Aluminum (Al) toxicity, which is caused by the solubilization of Al3+ in acid soils resulting in inhibition of root growth and nutrient/water acquisition, is a serious limitation to crop production, because up to one-half of the world's potentially arable land is acidic. To date, however, no Al tolerance genes have yet been cloned. The physiological mec
The American Society for Plant Biologists.
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10. Aluminum Tolerance Genes on the Short Arm of Chromosome 3R Are Linked to Organic Acid Release in Triticale1
Triticale, a hybrid between wheat and rye, shows a high degree of Al tolerance that is inherited from rye, but the mechanisms of high Al tolerance in both rye and triticale are unknown. We found that the short arm of chromosome 3R carries genes necessary for Al tolerance in triticale (× Triticosecale Wittmark cv Currency). Detailed comparative studies with
American Society of Plant Physiologists.
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11. Sorption of Aluminum to Plasma Membrane Vesicles Isolated from Roots of Scout 66 and Atlas 66 Cultivars of Wheat.
To further elucidate the mechanisms of differential genotypic tolerance to Al, plasma membrane (PM) vesicles were isolated from whole roots, root tips, and tipless roots of Al3+-sensitive and Al3+-tolerant cultivars (cv) of wheat (Triticum aestivum L. cv Scout 66 and cv Atlas 66, respectively). Vesicles from cv Scout root tips sorbed more Al than vesicles pr
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12. Al Partitioning Patterns and Root Growth as Related to Al Sensitivity and Al Tolerance in Wheat.
Studies of Al partitioning and accumulation and of the effect of Al on the growth of intact wheat (Triticum aestivum L.) roots of cultivars that show differential Al sensitivity were conducted. The effects of various Al concentrations on root growth and Al accumulation in the tissue were followed for 24 h. At low external Al concentrations, Al accumulation i