Dissertations / Theses on the topic 'Aluminum plants'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Aluminum plants.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Klugh, Katrina R. "Aluminum resistance of mycorrhizal plants." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4793.
Full textStone, Bethany. "The effects of boron deficiency and aluminum toxicity on plant magnesium /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3036861.
Full textNing, Jianchang. "Mycorrhizal roles in broomsedge plants under phosphorus limitation and aluminum toxicity." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1685.
Full textTitle from document title page. Document formatted into pages; contains vii, 146 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 126-145).
Parker, David R. "Speciation and phytotoxicity of mono- and polynuclear aluminum in dilute hydroxy-aluminum solutions." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/82626.
Full textPh. D.
Mahmud, Khairil. "Distribution and functional significance of Al in tropical forest plants." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=235553.
Full textO'Reilly, Kirk Thomas. "The role of copper in the apparent aluminum toxicity of aquatic systems." PDXScholar, 1985. https://pdxscholar.library.pdx.edu/open_access_etds/3522.
Full textAyeni, Olutoyosi Olaide. "Growth responses within the Genus Cyperus exposed to aluminium and iron in hydroponics." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2430.
Full textGenerally, aluminium (Al) is required as a micronutrient by plants. The metabolism of Al within the plant can exert a number of effects within the plant. These include: interfering with cell division in both root tips and lateral roots, increasing cell wall rigidity, maintaining the correct cellular redox state, as well as the various other physiological and growth responses. Al is one of the most abundant elements in the earth’s crust and becomes toxic in many plants when the concentration is greater than 2-3 ppm, where the soil has a pH<5.5. Iron (Fe) is an equally important element, and the toxicity of this metal possesses constraints primarily on wetland plants growing in acidic soils that have high reducible iron content. The impact of metal toxicity (Al and Fe) requires an understanding of many aspects related to Al and Fe uptake, transport and distribution by plants in wetland ecosystems. In this study, three species of Cyperus viz. Cyperus alternifolius, Cyperus prolifer and Cyperus textilis were used to carry out phytotoxicity tests to monitor xenobiotic substances.
Freitas, Lucas Barbosa de [UNESP]. "Interação silício e alumínio em plantas de arroz de terras altas e mamona." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/123372.
Full textA toxicidade ao alumínio (Al3+) é um dos principais limitantes da produtividade em solos ácidos e o silício (Si) é uma forma interessante de se minimizar a toxidez por Al3+ em plantas, porém, ainda não se conhece de forma clara o mecanismo envolvido na interação Si e Al3+. Assim, os objetivos que fundamentaram esse trabalho foram: avaliar a capacidade de fontes e doses de Al3+ em causar toxidez em plantas de arroz de terras altas cultivadas em solução nutritiva; avaliar a suscetibilidade ao Al3+ de cultivares de arroz de terras altas utilizados atualmente por agricultores brasileiros; avaliar a suscetibilidade ao Al3+ de linhagens de mamona do programa de melhoramento genético da FCA - UNESP; avaliar a interação Si e Al3+ em plantas de arroz de terras altas (cultura acumuladora de Si) e mamona (cultura não acumuladora de Si). Foram instalados cinco experimentos em casa de vegetação, conduzidos em solução nutritiva. Todos utilizaram delineamento em blocos casualizados e quatro repetições. Experimento 1 - disposto em modelo fatorial 2x5, os tratamentos foram duas fontes de Al3+ (sulfato de alumínio e potássio e cloreto de alumínio) e cinco doses de Al3+ (0; 370; 740; 1100 e 1480 μmol L-1) avaliadas em plantas de arroz de terras altas. Experimento 2 - disposto em modelo fatorial 2x9, os tratamentos foram com e sem Al3+ e nove cultivares de arroz de terras altas. Experimento 3 - disposto em modelo fatorial 2x9, os tratamentos foram com e sem Al3+ e nove linhagens de mamona. Experimento 4 - disposto em modelo fatorial 2x4, os tratamentos foram dois cultivares de arroz de terras altas (ANa 7007 - tolerante e Maravilha - suscetível ao Al3+) e quatro combinações de Si e Al3+ (1 – sem Si e sem Al3+; 2 – com Si e sem Al3+; 3 – sem Si e com Al3+; 4 – com Si e com Al3+). Experimento 5 - disposto em modelo fatorial 2x4, os tratamentos foram duas linhagens de mamona ...
The aluminum toxicity is a major limiting productivity in acid soils and Si is an interesting way to minimize the Al3+ toxicity in plants, however, the mechanism of this interaction between Si and Al3+ is not well understood. The objectives underlying this work were: evaluate the efficiency of aluminum sources and doses in causing toxicity in upland rice plants grown in nutrient solution; describe the susceptibility to Al3+ by upland rice cultivars currently used by Brazilians farmers; describe the susceptibility of castor bean cultivars of FCA - UNESP' plant breeding program; evaluate the interaction between Si and Al3+ in upland rice plants (Si-accumulator plant) and castor bean (non-Si-accumulator plant). Were installed five greenhouse experiments, conducted in nutrient solution. All experiments were laid out in randomized block design, with four replications. Experiment 1 - arranged in factorial design 2x4, the treatments were two Al3+ source (aluminum sulfate and aluminum chloride) and five Al3+ doses (0; 370; 740; 1100 and 1480 μmol L-1) evaluated in upland rice plants. Experiment 2 - arranged in factorial design 2x9, the treatments were with and without Al3+ and nine upland rice cultivars. Experiment 3 - arranged in factorial design 2x9, the treatments were with and without Al3+ and nine castor bean cultivars. Experiment 4 - arranged in factorial design 2x4, the treatments were two upland rice cultivars (Maravilha Al3+ susceptible and ANa 7007 Al3+ tolerant) and four Si e Al3+ combinations (1-without Si and without Al3+; 2-with Si and without Al3+; 3- without Si and with Al3+, 4-with Si and with Al3+). Experiment 5 - arranged in factorial design 2x4, the treatments were two castor bean cultivars (CRZ H18 Al3+ susceptible and CRZ H06 Al3+ tolerant) and four Si e Al3+ combinations (1-without Si and without Al3+; 2-with Si and without Al3+; 3- without Si and with Al3+, 4-with Si and with Al3+) ...
Metali, Faizah Haji. "Factors controlling Al accumulation in plants : effects of phylogeny, soil conditions and external nutrient supply." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=165794.
Full textRodriguez, Miguel A. "Molecular genetic approaches to the study of aluminum tolerance and toxicity in wheat and rye /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060136.
Full textcom, harriehofstede@yahoo, and Henricus T. Hofstede. "Use of bauxite refining residue to reduce the mobility of heavy metals in municipal waste compost." Murdoch University, 1994. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060815.143422.
Full textRadke, William Henry. "The interrelationships of electric utilities and energy intensive industries : the case of the primary aluminum industry." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/28778.
Full textLungu, Sosten. "Effect of poultry litter amended with aluminum sulfate on plant growth and soil properties." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-05162008-125227.
Full textMartinez, Julio Alberto. "INFLUENCE OF ALUMINUM ION ON THE ANAEROBIC TREATMENT OF A POULTRY SLAUGHTERHOUSE WASTEWATER." MSSTATE, 2003. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07212003-094518/.
Full textFreitas, Lucas Barbosa de 1984. "Interação silício e alumínio em plantas de arroz de terras altas e mamona /." Botucatu, 2015. http://hdl.handle.net/11449/123372.
Full textBanca: Roberto Lyra Villas Boas
Banca: Rosemary Marques de A. Bertani
Banca: Orivaldo Arf
Banca: Adalton Mazetti Fernandes
Resumo: A toxicidade ao alumínio (Al3+) é um dos principais limitantes da produtividade em solos ácidos e o silício (Si) é uma forma interessante de se minimizar a toxidez por Al3+ em plantas, porém, ainda não se conhece de forma clara o mecanismo envolvido na interação Si e Al3+. Assim, os objetivos que fundamentaram esse trabalho foram: avaliar a capacidade de fontes e doses de Al3+ em causar toxidez em plantas de arroz de terras altas cultivadas em solução nutritiva; avaliar a suscetibilidade ao Al3+ de cultivares de arroz de terras altas utilizados atualmente por agricultores brasileiros; avaliar a suscetibilidade ao Al3+ de linhagens de mamona do programa de melhoramento genético da FCA - UNESP; avaliar a interação Si e Al3+ em plantas de arroz de terras altas (cultura acumuladora de Si) e mamona (cultura não acumuladora de Si). Foram instalados cinco experimentos em casa de vegetação, conduzidos em solução nutritiva. Todos utilizaram delineamento em blocos casualizados e quatro repetições. Experimento 1 - disposto em modelo fatorial 2x5, os tratamentos foram duas fontes de Al3+ (sulfato de alumínio e potássio e cloreto de alumínio) e cinco doses de Al3+ (0; 370; 740; 1100 e 1480 μmol L-1) avaliadas em plantas de arroz de terras altas. Experimento 2 - disposto em modelo fatorial 2x9, os tratamentos foram com e sem Al3+ e nove cultivares de arroz de terras altas. Experimento 3 - disposto em modelo fatorial 2x9, os tratamentos foram com e sem Al3+ e nove linhagens de mamona. Experimento 4 - disposto em modelo fatorial 2x4, os tratamentos foram dois cultivares de arroz de terras altas (ANa 7007 - tolerante e Maravilha - suscetível ao Al3+) e quatro combinações de Si e Al3+ (1 - sem Si e sem Al3+; 2 - com Si e sem Al3+; 3 - sem Si e com Al3+; 4 - com Si e com Al3+). Experimento 5 - disposto em modelo fatorial 2x4, os tratamentos foram duas linhagens de mamona ...
Abstract: The aluminum toxicity is a major limiting productivity in acid soils and Si is an interesting way to minimize the Al3+ toxicity in plants, however, the mechanism of this interaction between Si and Al3+ is not well understood. The objectives underlying this work were: evaluate the efficiency of aluminum sources and doses in causing toxicity in upland rice plants grown in nutrient solution; describe the susceptibility to Al3+ by upland rice cultivars currently used by Brazilians farmers; describe the susceptibility of castor bean cultivars of FCA - UNESP' plant breeding program; evaluate the interaction between Si and Al3+ in upland rice plants (Si-accumulator plant) and castor bean (non-Si-accumulator plant). Were installed five greenhouse experiments, conducted in nutrient solution. All experiments were laid out in randomized block design, with four replications. Experiment 1 - arranged in factorial design 2x4, the treatments were two Al3+ source (aluminum sulfate and aluminum chloride) and five Al3+ doses (0; 370; 740; 1100 and 1480 μmol L-1) evaluated in upland rice plants. Experiment 2 - arranged in factorial design 2x9, the treatments were with and without Al3+ and nine upland rice cultivars. Experiment 3 - arranged in factorial design 2x9, the treatments were with and without Al3+ and nine castor bean cultivars. Experiment 4 - arranged in factorial design 2x4, the treatments were two upland rice cultivars (Maravilha Al3+ susceptible and ANa 7007 Al3+ tolerant) and four Si e Al3+ combinations (1-without Si and without Al3+; 2-with Si and without Al3+; 3- without Si and with Al3+, 4-with Si and with Al3+). Experiment 5 - arranged in factorial design 2x4, the treatments were two castor bean cultivars (CRZ H18 Al3+ susceptible and CRZ H06 Al3+ tolerant) and four Si e Al3+ combinations (1-without Si and without Al3+; 2-with Si and without Al3+; 3- without Si and with Al3+, 4-with Si and with Al3+) ...
Doutor
Silva, Carolina de Marchi Santiago da [UNESP]. "Mecanismos de tolerância ao Al3+ em plantas comparando espécie de Cerrado (Styrax camporum), limoeiro ‘cravo’ (Citrus limonia cv. cravo) e trigo (Triticum aestivum)." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152595.
Full textApproved for entry into archive by Ana Paula Santulo Custódio de Medeiros null (asantulo@rc.unesp.br) on 2018-01-26T11:13:36Z (GMT) No. of bitstreams: 1 silva_cms_dr_rcla.pdf: 9847207 bytes, checksum: d4dc0d33ef54769d644003d06014b328 (MD5)
Made available in DSpace on 2018-01-26T11:13:36Z (GMT). No. of bitstreams: 1 silva_cms_dr_rcla.pdf: 9847207 bytes, checksum: d4dc0d33ef54769d644003d06014b328 (MD5) Previous issue date: 2017-11-28
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Presente em solos ácidos, o alumínio principalmente encontrado na sua forma tóxica (Al3+) tem como principal efeito a diminuição do crescimento radicular. O Cerrado ocorre no centro-oeste do Brasil sob solos ácidos (pH <4) e com alto teor de alumínio (Al). Citrus limonia cv ‘Cravo’ Osbeck e Styrax camporum Pohl compartilham localização geográfica e características edáficas em que se estabelecem, no entanto exibem respectivamente sensibilidade e tolerância ao Al. O presente trabalho visa elucidar mecanismos envolvidos no estresse por Al3+ a nível de expressão gênica radicular. Para as duas espécies foi feita uma análise de transcriptoma para avaliar os efeitos do Al por uma perspectiva global, e a partir destes resultados alguns genes foram selecionados para avaliação ao longo de experimentos de hidroponia mantido por 60 dias. São discutidas estratégias de tolerância e sensibilidade ao Al nas duas espécies, juntamente com análises de biometria, quantificação hormonal e anatomia que corroboram o comportamento sensível de Citrus e tolerante de Styrax por diversas vias. Além disso, o último capítulo trata da dependência do pH em um importante mecanismo de tolerância ao Al em trigo envolvendo exsudação de ácido orgânico.
Present in acid soils, aluminum mainly found in its toxic form (Al3+) has as main effect the decrease of root growth. Cerrado occurs in central-western Brazil under acid soils (pH <4) and high aluminum content (Al). Citrus limonia (Osbeck) and Styrax camporum (Pohl) share geographic location and edaphic characteristics in where they are settled, however exhibiting respectively Al-sensitivity and Al-tolerance. The present work aims to elucidate the mechanisms involved in Al3+ stress at root gene expression level. For both species, a transcriptome analysis was performed to evaluate the effects of Al in a global perspective, and from these results some genes were selected for evaluation in hydroponic experiments maintained for 60 days. Al tolerance and sensitivity strategies are discussed in both species, together with analyzes of biometrics, hormonal quantification and anatomy data that corroborate the Al-sensitive behavior of Citrus and Al-tolerance in Styrax by several routes. In addition, the last chapter deals with the dependence of pH on one important mechanism of Al tolerance in wheat involving organic acid exudation.
FAPESP: 2013/11370-3
Di, Corleto Ross, and mikewood@deakin edu au. "The Evaluation of heat stress indices using physiological comparisons in an alumina refinery in a sub-tropical climate." Deakin University, 1998. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20050915.124324.
Full textFeltrim, Daniela 1983. "Análise funcional e fisiológica de genes de milho induzidos pelo estresse por alumínio." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317057.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-22T18:33:40Z (GMT). No. of bitstreams: 1 Feltrim_Daniela_M.pdf: 2255232 bytes, checksum: c1f34d09fda3a2de4f7c62d0c7b9ec71 (MD5) Previous issue date: 2013
Resumo: O presente trabalho possui como objetivo caracterizar fisiológica e funcionalmente um gene de milho que têm expressão relacionada com a tolerância ao cultivo em solo ácido contendo níveis tóxicos de alumínio (Al). Este gene, denominado Zmwrky69, foi identificado na linhagem de milho Cat100-6, tolerante ao Al (Mattiello et al., 2010). A análise da sequência da proteína ZmWRKY69 indica que ela pertence ao grupo III dessa família de fatores de transcrição, apresentando o motivo WRKYGKQ na região amino terminal e o motivo dedo de zinco Cx7Cx23HxC na região carboxi terminal. A proteína ZmWRKY69 está localizada no núcleo, conforme inferido por ensaio de localização subcelular em epitélio de cebola empregando uma fusão da proteína de milho com a proteína verde fluorescente (GFP). Ensaios de duplo híbrido em levedura indicam que a proteína ZmWRKY69 interage com um receptor de giberelina, uma proteína envolvida com a regulação por auxinas e uma proteína com função desconhecida. Plantas transgênicas de tabaco superexpressando Zmwrky69 apresentaram menor inibição do crescimento radicular na presença de Al, comparativamente às plantas selvagens. Esses resultados indicam que o gene Zmwrky69 codifica um fator de transcrição que apresenta um papel importante na tolerância ao Al em milho
Abstract: The objective of the present work is to characterize a gene differentially expressed in the maize inbred line Cat100-6 (aluminum tolerant) grown in acidic soil containing toxic levels of aluminum. This gene called Zmwrky69 was identified in the aluminum tolerant Cat100-6 inbred line (Mattiello et al., 2010). The sequence analysis of the ZmWRKY69 protein indicated that it belongs to the group III of this transcription factor family classification. The protein has the motif WRKYGKQ in the amino terminal region and a zinc finger motif Cx7Cx23HxC in the carboxi terminal region. This protein is localized in the nucleus as inferred by subcellular localization in onion epidermis using a maize protein fused to the Green Fluorescent Protein (GFP). Yeast two-hybrid essays indicate that the protein ZmWRKY69 interacts with a gibberellin receptor, a protein involved in auxin regulation and a protein with an unknown function. Transgenic tobacco plants overexpressing Zmwrky69 presented a lower degree of root growth inhibition in the presence of Al compared to wild type plants. These results indicate that Zmwrky69 gene encodes a transcription factor that presents an important role in Al tolerance in maize
Mestrado
Genetica Vegetal e Melhoramento
Mestra em Genética e Biologia Molecular
Mattiello, Lucia. "Fisiologia e transcriptoma de milho cultivado em solo ácido." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317449.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-16T10:26:16Z (GMT). No. of bitstreams: 1 Mattiello_Lucia_D.pdf: 1855407 bytes, checksum: 309c252e258389c8f81e79e8fba49e74 (MD5) Previous issue date: 2010
Resumo: A presença do alumínio (Al) em solos ácidos é o principal fator limitante da produtividade agrícola no Brasil e no mundo. A resposta desenvolvida pelas plantas contra o Al é complexa e a identificação de genes responsivos após a exposição ao íon através de técnicas de análise em larga escala, como microarrays, pode facilitar a sua compreensão. Este projeto possui como objetivo ampliar o conhecimento sobre a fisiologia e a regulação gênica de raízes e folhas utilizando genótipos contrastantes de milho (Cat100-6 (Al-tolerante) e S1587-17 (Al-sensível)) cultivadas em solo ácido com concentração fitotóxica de Al. As linhagens de milho Cat100-6 e S1587-17 foram cultivadas por um ou três dias em solo ácido (pH 4,1) ou solo corrigido com Ca(OH)2 (pH 5,5). O genótipo S1587-17 apresentou uma maior inibição do crescimento radicular, resultado este altamente correlacionado com a acumulação de Al nos ápices radiculares e deposição de calose. Os dados fisiológicos confirmam a discriminação entre as duas linhagens em solo, abrindo perspectivas para entender pela primeira vez a base molecular das alterações das plantas em condições próximas à realidade de campo. O transcriptoma de raízes possibilitou a identificação possíveis candidatos a tolerância ao Al. Adicionalmente, com um experimento de hidroponia separamos as variáveis pH e presença de Al, ambas condições diferenciais do tratamento com solo. Identificamos, entre os candidatos, genes responsivos pela presença do Al e não pela acidez delimitando assim os genes com possíveis papéis na tolerância ao Al presente no solo ácido a apenas três: retinol desidrogenase, um fator de transcrição WRKY e uma proteína desconhecida. Esses resultados permitem concluir que o cultivo em solo é diferencial em relação à hidroponia, e outros fatores que apenas presentes no substrato solo podem provocar a indução de alguns genes. Diversas vias metabólicas são afetadas na linhagem sensível pelo tratamento em solo ácido e podem estar envolvidas na inibição radicular como a produção de lignina, celulose e calose e a síntese de etileno e auxina. O mapeamento nos cromossomos dos genes identificados pelo experimento de microarray das raízes de milho permitiu a identificação de genes localizados dentro de QTLs de milho previamente descritos na literatura como responsáveis pelo fenótipo tolerante. Diante esse resultado, podemos especular o papel de genes como uma proteína ligadora de RNA, uma inibidora de proteases e ciclinas na tolerância ao Al contido no solo ácido. Pela primeira vez na literatura, o transcriptoma de folhas coletadas após três dias de cultivo em solo ácido ou solo corrigido foi obtido com o uso de microarrays da Affymetrix. Essa análise indicou profundas alterações na Cat100-6, em contraposição à ausência de alteração significativa nas folhas na S1587-17. Genes referentes à fotossíntese e a fotorrespiração foram regulados negativamente pelo tratamento em solo ácido no genótipo tolerante. Contudo, o ciclo do ácido cítrico está ativado indicando uma putativa participação da produção de ácidos orgânicos nas folhas na resposta ao Al
Abstract: The presence of aluminum (Al) is the main factor limiting crops yield in Brazil and worldwide. The plant responses developed against this ion are complex and the identification of responsive genes after exposure to the ion with the use of a large scale technique, such as microarrays, can facilitate its comprehension. This project aimed to amplify the knowledge about physiology and gene expression regulation of roots and leaves associated towards Al resistance using contrasting maize genotypes (Cat100-6 (Al-tolerant) and S1587-17 (Al-sensitive) cultivated in acid soil containing phytotoxic concentrations of Al. Maize lines Cat100-6 and S1587-17 were cultivated for one or three days in acid soil (pH 4,1) or limed soil with Ca(OH)2 (pH 5,5). The genotype S1587-17 presented a higher root growth inhibition, which is highly correlated with Al accumulation in the root apexes and callose deposition. The physiological data confirms the discrimination of the two maize lines cultivated in soil, opening perspective to understand for the first time the molecular bases of alterations in plants on a closer condition to the field. Transcriptome from roots made possible the identification of possible tolerance candidates and genes constitutively expressed genes in the tolerant line. Additionally, throw a hydroponic experiment we splited the variables pH and Al presence, both differential conditions between soil treatments. It was possible to identify, among the candidates, genes responsive in the presence of Al in acid soil rather than acidity limiting genes with a possible roles in Al present in the acid soil tolerance to only three: retinol dehydrogenase, the transcription factor WRKY and an unknown protein. These results allow the conclusion that the soil culture is different in relation to hydropony, and other factors present only in soil substrate could provoke the induction of some genes. Several metabolic pathways were affected in the sensitive line after acid soil growth and could be involved on root growth inhibition such as lignin, cellulose and callose production and ethylene and auxin synthesis. The mapping of the identified genes through the microarray experiments into the chromosomes allowed the identification of genes localized into maize QTLs previously reported in the literature as responsible for the tolerant phenotype. Facing these results, we can speculate the role of these genes such as a RNA binding protein, a protease inhibitor, and cyclines in the Al present in the acid soil tolerance. For the first time in literature, the transcriptome of leaves collected after three days in culture with acid soil or limed soil with the Affymetrix microarrays. This analysis indicated great alterations in Cat100-6, meanwhile S1587-17 showed no significative alteration. Genes related to photosynthesis and photorespiration were down-regulated due acid soil treatment in the tolerant genotype. However, citric acid cycle was activated indicating the putative partitipation of organic acids produced in the leaves in thr Al response
Doutorado
Genetica Vegetal e Melhoramento
Doutor em Genetica e Biologia Molecular
Baldacin, Maria Graziela Zagatto Krug. "Caracterização do gene Zmlim-1 de milho e seu papel na tolerância ao alumínio." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317047.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-16T17:06:41Z (GMT). No. of bitstreams: 1 Baldacin_MariaGrazielaZagattoKrug_D.pdf: 4445527 bytes, checksum: 9730d155ac6ebf7d24d427feb43a2acb (MD5) Previous issue date: 2010
Resumo: A toxidez por alumínio (Al3+) é o principal fator limitante da produção agrícola em grandes áreas do Brasil e do mundo. Sabe-se que a defesa das plantas a este elemento é controlada por múltiplos genes. A caracterização de genes cuja expressão é induzida pelo Al contribui para compreender as defesas ativadas pelas plantas. Neste trabalho identificou-se um cDNA de milho expresso em raízes através da técnica de mRNA differential display. Este cDNA codifica uma seqüência que contem dois domínios LIM, separados por um espaçador de 40-50 resíduos, sendo denominado Zmlim-1. O objetivo deste trabalho é a caracterização deste gene e o seu papel na tolerância ao Al em milho. Em estudos de expressão verificou-se que o gene Zmlim- 1 é induzido por Al e sua expressão é maior na linhagem tolerante, Cat100-6, quando comparado com a linhagem sensível S1587-17. O direcionamento da proteína ZMLIM-1 foi observado em epitélios de cebola bombardeados com a construção fusionada à proteína GFP (green fluorescent protein). A expressão transiente revelou que esta proteína está localizada no citoplasma e no núcleo. A hibridização in situ demonstrou que Zmlim-1 é expresso na maioria das células do ápice de raiz de milho. O sistema de duplo híbrido de levedura permitiu identificar três proteínas que interagem com a proteína ZMLIM-1: duas proteínas da subunidade ribossomal e uma proteína da família OMT envolvida na biossíntese de lignina. Plantas transgênicas silenciando este gene forneceram evidências de que o gene Zmlim-1 pode influenciar a anatomia da raiz e a quantidade de lignina. Este é o primeiro relato de interação OMT com proteínas de domínio LIM, sugerindo um envolvimento desta proteína com a biossíntese de lignina. Plantas transgênicas submetidas ao estresse por Al3+ não apresentaram diferenças com relação às plantas controle não transformadas
Abstract: Aluminum (Al) toxicity is the main factor limiting agricultural production in large areas in Brazil and in the world. It is known that plant defenses against this element are controlled by multiple genes. The characterization of genes whose expression is induced by Al contributes to the understanding of the defenses activated by plants. In this work we identified a cDNA expressed in maize roots using mRNA differential display. This cDNA encodes a sequence that contains two LIM domains separated by a spacer of 40-50 residues, being named Zmlim-1. The purpose of this study was the characterization of this gene and its involvement in Al tolerance in maize. In expression studies it was found that the Zmlim-1 gene was induced by Al and its expression was higher in the tolerant line, Cat100-6 when compared with the sensitive line S1587-17. The subcellular localization of the protein ZMLIM-1 was observed in onion epithelial cells bombarded with a ZMLIM-1::GFP (green fluorescent protein) fusion. The assay of transient expression revealed that this protein is localized in cytoplasm and nucleus. In situ hybridization showed that Zmlim-1 is expressed in most cells of the root apex of maize. The yeast two hybrid system identified three proteins that interact with ZMLIM-1 protein: tworibosomal subunit proteins and a protein from the OMT family involved in lignin biosynthesis. Transgenic plants silenced for this gene have provided evidence that Zmlim-1 gene can influence the anatomy of the root and the amount of lignin in the plants. This is the first report of OMT interaction with LIM domain proteins, suggesting an involvement of this protein with lignin biosynthesis. Transgenic plants subjected to Al3+ stress did not show differences when compared to control, untransformed plants
Doutorado
Genetica Vegetal e Melhoramento
Doutor em Genetica e Biologia Molecular
Kopeloff, Leonardo. "Modern control theory application in mill main drive design." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50037.
Full textMaster of Science
incomplete_metadata
Terrill, Thomas Howard. "Effects of soil moisture and al-nitrilotriacetate on yeild chemical composition and digestibility of ryegrass (Lolium multiflorum, L.) by meadow voles." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/53088.
Full textMaster of Science
Babicz, Sylvain. "Etude diélectrique des isolants plats anodisés pour la conception de machines électriques." Thesis, Artois, 2016. http://www.theses.fr/2016ARTO0204/document.
Full textThe use of state of the art organic enamels, capable to withstand 280 °C, makes the temperature class increase of electrical machine reaching its maximum. A technological breakthrough can be found by the substitution of organic enamel by a ceramic based insulation. Those materials are good dielectrics and their temperature resistance is very high compared to a classical technology. In this work, the studied conductor is an aluminum tape which insulation is obtained by an anodisation, an electrochemical process. This surface treatment makes the aluminum oxidizing: a thin layer of a few micrometres is obtained, thus representing the insulation layer of the conductor. The objectives of those PhD works is to identify and characterize this particular type of conductor so as to demonstrate the ability of using an anodized aluminum tape to makeelectrical machine running up to 400 °C. Measurements of PDIV, PDEV, and breakdown voltage are carried under various environmental conditions (temperatures varying from -70 °C up to 650 °C, variable humidity level). The use of an inverter to supply this high temperature machine induces steep fronts and over voltages. As a consequence, a theoretical model of a coil, made with this kind of conductor, is then proposed and based upon the impedance spectrum of the coil. The aim of this model is to help the designer to predict the first over voltage amplitude and to make the insulation of the first coil according to that. At least, a coil insulation improvement is depicted, using boron oxide: an impregnation is held to reinforce the alumina layer on the edge of the tape
Bleby, Timothy Michael. "Water use, ecophysiology and hydraulic architecture of Eucalyptus marginata (jarrah) growing on mine rehabilitation sites in the jarrah forest of south-western Australia." University of Western Australia. School of Plant Biology, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0004.
Full textFreitas, Lucas Barbosa de [UNESP]. "Silício na tolerância ao alumínio por plantas de arroz." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/86419.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O arroz de terras altas tem características de rusticidade, tendo certa tolerância à acidez do solo e toxidez por alumínio, ferro, manganês e acumula altos níveis de silício. O silício absorvido proporciona às plantas melhorias, entre elas ameniza a toxidez por alumínio. Diante do exposto, o objetivo deste trabalho foi avaliar a interação do silício na tolerância de plantas de arroz a alumínio. Foram instalados dois experimentos em casa de vegetação, o primeiro foi conduzido em solução nutritiva, e o segundo em vasos com solo, ambos utilizaram delineamento em blocos inteiramente casualizados, em esquema fatorial 2 x 5, com quatro repetições. Os tratamentos de ambos experimentos foram constituídos por dois cultivares de arroz de terras altas (BRS Talento - não tolerante e Guarani - tolerante ao Al tóxico), e cinco doses de Si (0, 30, 60, 90 e 120 mg dm-3). No experimento I as plantas ficaram quatorze dias na solução nutritiva com Si e em seguida, trocou-se a solução retirando o Si e adicionando 40 mg dm-3 de Al3+, e no experimento II, utilizou-se solo naturalmente alumínico. Para o experimento I em solução nutritiva, foram avaliados: comprimento, área de superfície, volume e diâmetro médio radicular, altura de planta, número de perfilhos por planta, produção de matéria seca e teores de nutrientes do sistema radicular e da parte aérea e quantidade acumulada de nutrientes na raiz, parte aérea e absorvida por metro de raiz. No experimento II em vasos com solo, foram realizadas as seguintes avaliações: altura da planta, número de perfilhos por planta, produção de matéria seca, teores e acúmulo de nutrientes da parte aérea, número de colmos por metro quadrado, porcentagem de colmos férteis, número de panículas, número total de espiguetas por panícula, número de espiguetas granadas e chochas por panícula, fertilidade das espiguetas, massa...
The upland rice (Oryza sativa L.) has characteristics of rusticity, having some tolerance to soil acidity and toxic aluminum, iron, manganese and accumulate high levels of silicon. The silicon absorbed provides the plant improvements, including alleviates toxic aluminum. Given the above, the objective was to evaluate the interaction of silicon on tolerance of rice plants to aluminum. Two experiments were established in the greenhouse, the first was conducted in nutrient solution, and the second in pots with soil, both used in a completely randomized design in factorial 2 x 5 with four replications. The treatments of both experiments consisted of two cultivars of upland rice (BRS Talento - not tolerant and Guarani - tolerant to Al toxicity), and added five doses Si (0, 30, 60, 90 and 120 mg dm-3). In experiment I, plants were fourteen days in nutrient solution with Si and then changed the solution by removing the Si and adding 40 mg dm-3 Al3+, and in experiment II we used soil naturally aluminate. For the first experiment in nutrient solution were evaluated: length, surface area, volume and average root diameter, plant height, number of tillers-perplant, dry matter production, nutrient content of root and shoot and total quantity of nutrient in root, shoot and absorbed per meter of root. In experiment II in pots with soil, the following evaluations were made: plant height, number of tillers per plant, dry matter production, nutrient content of shoots, number of stems per square meter, percentage of fertile stalks, number of panicles, total number of spikelets per panicle, number of spikelets per panicle were empty and grenades, spikelet fertility, 1000 grain weight, grain yield and pH, organic matter... (Complete abstract click electronic access below)
Silva, Laerte Marques da [UNESP]. "Crescimento radicular e absorção de nutrientes de cultivares de arroz submetidos ao alumínio em solução nutritiva." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/99918.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
A cultura do arroz no Brasil apresenta baixa produtividade de grãos tendo entre as várias causas, o cultivo em solos de baixas fertilidades com altos níveis de alumínio tóxico na solução e o baixo uso de insumos agrícolas, sendo incipiente os estudos sobre o desenvolvimento do sistema radicular de cultivares de arroz associados aos grupos comerciais moderno, intermediário e tradicional. Em função do exposto, o presente trabalho objetivou estudar as respostas de cultivares de arroz, quanto ao crescimento radicular, desenvolvimento da parte aérea e a nutrição das plantas sob diferentes níveis de alumínio em solução nutritiva. O experimento foi conduzido em solução nutritiva em condições de casa-devegetação, no Departamento de Produção Vegetal da FCA/UNESP, Câmpus de Botucatu, no ano de 2005. O delineamento experimental utilizado foi inteiramente casualizado com quatro repetições, seguindo um modelo fatorial 3x4, com três cultivares de arroz (BRS Talento, Caiapó e Primavera) e quatro níveis de alumínio na solução nutritiva (0,0; 10,0; 20,0 e 40, 0 mg L-1). Pelos resultados obtidos concluiu-se que, a cultivar Primavera é mais tolerante á toxidez de Al3+, enquanto BRS Talento e Caiapó são mais sensíveis à toxicidade de Al3+, o sistema radicular, a massa seca das raízes, da parte aérea e total são bons indicadores de tolerância ao Al3+, níveis tóxicos de Al3+, interferem no transporte de P, K, Ca, Mg e Mn para a parte aérea, o P, Mg e Mn são os nutrientes menos acumulados pelo arroz sob estresse de Al3+, a eficiência de absorção do sistema radicular fica comprometida pelo estresse de Al3+, principalmente para o P e Mg.
The rice field in Brasil show low yields having many factors affecting as planting in soil with low fertility with high levels of toxic aluminum and low use of tecnology and fertilizer, being incipient the studies about the development of radicular system of rice cultivars to the modern, intermediate and tradicional groups. This work objected to study rice cultivars response for root growth, vegetative parts development and nutrition of plants submitted to different levels of aluminum in nutritive solution.The experimente was conduct in nutritive solution inside the greenhouse at the Departament of Vegetal Production on FCA/UNESP , Botucatu Campus, in 2005.The experimental design used was completelly randomized with four replications, 3x4 factorial design, with three rice cultivars(BRS Talento, Caiapó and Primaera) and four aluminum levels on nutritive solution (0,0, 10,0, 20,0 e 40,0 mg L-1. Results showed that the cultivar Primavera is more tolerant to Al+3 toxicity, while BRS Talendo and Caiapó are more sensitive. Root system development, root dry matter and vegetative part development are good indicators of Al+3 tolerance. High levels of aluminum interfere P, K, Ca, Mg e Mn transportation to vegetative parts, and P, Mg e Mn are the less acumulative nutrients for rice under Al+3 stress. Absorption of P and Mg by the root system is damage under Al+3 stress.
Silva, Marcela Paula. "O meio de cultura sólido diminui a exsudação de ácidos orgânicos em raízes de plantas expostas ao alumínio em relação à solução nutritiva? /." Rio Claro, 2019. http://hdl.handle.net/11449/183355.
Full textResumo: O alumínio (Al) é um dos componentes mais abundantes da crosta terrestre e é tóxico à maioria das plantas, sendo o seu primeiro sintoma de toxicidade a redução no crescimento radicular. Algumas plantas desenvolveram mecanismos para tolerar a presença do Al por meio da formação de complexos de ácidos orgânicos (AOs) com Al, internamente (no simplasto da folha ou das raízes) ou fora da raiz (apoplasto da raiz ou rizosfera). Neste trabalho, plantas de Titricum aestivum L. (Poaceae) (trigo) de cultivar sensível ao Al (ANAHUC75) e tolerante ao Al (JAC5) foram cultivados em diferentes concentrações de Al, variando o estado físico do meio, sendo estes sólido e líquido. Foram encontrados o ácido oxálico e succínico exsudados pelas raízes e acumulados no meio de cultura. Estes foram qualificados e quantificados por Cromatografia Gasosa por Espectrofotometria de Massas (GC-MS) e analisados por métodos estatísticos (ANOVA, teste de Kruskal-Wallis e PCA). Assim, foi possível verificar que o estado físico do meio de cultura gera diferenças significativas nas concentrações de exsudados pela raiz quando cultivadas nas mesmas concentrações de Al, visto que para o ácido succínico em ambas as cultivares e em todos os tratamentos e o ácido oxálico na cultivar tolerante apresentaram disparidade em relação aos teores exsudados.
Abstract: Aluminum (Al) is one of the most abundant elements of the Earth's crust and it is toxic to most plants, being the reduction of root growth its first toxicity symptom. Some plants have developed mechanisms to tolerate Al through the formation of organic acid complexes (AOs) with Al. This occurs internally (in the root or leaf symplast) or outside the root environment (root apoplast or even in the rhizosphere). Here, Titricum aestivum L. (Poaceae) (wheat) plants of an Al-sensitive cultivar (ANAHUC75) and an Al-tolerant cultivar (JAC5) were cultivated at different concentrations of Al, varying the physical state of the medium, being solid and liquid. Oxalic and succinic acid were exuded by the roots and accumulated in the culture medium. These were qualified and quantified by Mass Spectrophotometric Gas Chromatography (GC-MS) and analyzed by statistical methods (ANOVA, Kruskal-Wallis test and PCA). Thus, it was possible to verify that the physical state of the culture medium generates significant differences in the concentrations of root exudates when cultivated at the same Al concentrations, since for succinic acid in both cultivars and in all treatments and oxalic acid in tolerant cultivar presented disparity in relation to the exudate contents.
Mestre
Freitas, Lucas Barbosa de 1984. "Silício na tolerância ao alumínio por plantas de arroz /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/86419.
Full textBanca: Carlos Alexandre Costa Crusciol
Banca: Orvaldo Arf
Resumo: O arroz de terras altas tem características de rusticidade, tendo certa tolerância à acidez do solo e toxidez por alumínio, ferro, manganês e acumula altos níveis de silício. O silício absorvido proporciona às plantas melhorias, entre elas ameniza a toxidez por alumínio. Diante do exposto, o objetivo deste trabalho foi avaliar a interação do silício na tolerância de plantas de arroz a alumínio. Foram instalados dois experimentos em casa de vegetação, o primeiro foi conduzido em solução nutritiva, e o segundo em vasos com solo, ambos utilizaram delineamento em blocos inteiramente casualizados, em esquema fatorial 2 x 5, com quatro repetições. Os tratamentos de ambos experimentos foram constituídos por dois cultivares de arroz de terras altas (BRS Talento - não tolerante e Guarani - tolerante ao Al tóxico), e cinco doses de Si (0, 30, 60, 90 e 120 mg dm-3). No experimento I as plantas ficaram quatorze dias na solução nutritiva com Si e em seguida, trocou-se a solução retirando o Si e adicionando 40 mg dm-3 de Al3+, e no experimento II, utilizou-se solo naturalmente alumínico. Para o experimento I em solução nutritiva, foram avaliados: comprimento, área de superfície, volume e diâmetro médio radicular, altura de planta, número de perfilhos por planta, produção de matéria seca e teores de nutrientes do sistema radicular e da parte aérea e quantidade acumulada de nutrientes na raiz, parte aérea e absorvida por metro de raiz. No experimento II em vasos com solo, foram realizadas as seguintes avaliações: altura da planta, número de perfilhos por planta, produção de matéria seca, teores e acúmulo de nutrientes da parte aérea, número de colmos por metro quadrado, porcentagem de colmos férteis, número de panículas, número total de espiguetas por panícula, número de espiguetas granadas e chochas por panícula, fertilidade das espiguetas, massa... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The upland rice (Oryza sativa L.) has characteristics of rusticity, having some tolerance to soil acidity and toxic aluminum, iron, manganese and accumulate high levels of silicon. The silicon absorbed provides the plant improvements, including alleviates toxic aluminum. Given the above, the objective was to evaluate the interaction of silicon on tolerance of rice plants to aluminum. Two experiments were established in the greenhouse, the first was conducted in nutrient solution, and the second in pots with soil, both used in a completely randomized design in factorial 2 x 5 with four replications. The treatments of both experiments consisted of two cultivars of upland rice (BRS Talento - not tolerant and Guarani - tolerant to Al toxicity), and added five doses Si (0, 30, 60, 90 and 120 mg dm-3). In experiment I, plants were fourteen days in nutrient solution with Si and then changed the solution by removing the Si and adding 40 mg dm-3 Al3+, and in experiment II we used soil naturally aluminate. For the first experiment in nutrient solution were evaluated: length, surface area, volume and average root diameter, plant height, number of tillers-perplant, dry matter production, nutrient content of root and shoot and total quantity of nutrient in root, shoot and absorbed per meter of root. In experiment II in pots with soil, the following evaluations were made: plant height, number of tillers per plant, dry matter production, nutrient content of shoots, number of stems per square meter, percentage of fertile stalks, number of panicles, total number of spikelets per panicle, number of spikelets per panicle were empty and grenades, spikelet fertility, 1000 grain weight, grain yield and pH, organic matter... (Complete abstract click electronic access below)
Mestre
Silva, Laerte Marques da 1972. "Crescimento radicular e absorção de nutrientes de cultivares de arroz submetidos ao alumínio em solução nutritiva /." Botucatu : [s.n.], 2007. http://hdl.handle.net/11449/99918.
Full textAbstract: The rice field in Brasil show low yields having many factors affecting as planting in soil with low fertility with high levels of toxic aluminum and low use of tecnology and fertilizer, being incipient the studies about the development of radicular system of rice cultivars to the modern, intermediate and tradicional groups. This work objected to study rice cultivars response for root growth, vegetative parts development and nutrition of plants submitted to different levels of aluminum in nutritive solution.The experimente was conduct in nutritive solution inside the greenhouse at the Departament of Vegetal Production on FCA/UNESP , Botucatu Campus, in 2005.The experimental design used was completelly randomized with four replications, 3x4 factorial design, with three rice cultivars(BRS Talento, Caiapó and Primaera) and four aluminum levels on nutritive solution (0,0, 10,0, 20,0 e 40,0 mg L-1. Results showed that the cultivar Primavera is more tolerant to Al+3 toxicity, while BRS Talendo and Caiapó are more sensitive. Root system development, root dry matter and vegetative part development are good indicators of Al+3 tolerance. High levels of aluminum interfere P, K, Ca, Mg e Mn transportation to vegetative parts, and P, Mg e Mn are the less acumulative nutrients for rice under Al+3 stress. Absorption of P and Mg by the root system is damage under Al+3 stress.
Orientador: Leandro Borges Lemos
Coorientador: Carlos Alexandre Costa Crusciol
Banca: Maurício Dutra Zanotto
Banca: José Salvador Simoneti Foloni
Banca: José Carlos Feltran
Banca: Sandro Roberto Brancalião
Doutor
Grossman, Mark Philip 1967. "Strategy and operational improvement in an aluminum rolling plant." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35412.
Full textIncludes bibliographical references (p. 99-100).
by Mark Grossman.
M.S.
Flis, Paulna. "Développement de méthodes analytiques pour une spéciation à grande échelle des composés métalliques dans les plantes." Thesis, Pau, 2013. http://www.theses.fr/2013PAUU3023/document.
Full textNumerous metals, such as, e.g. Zn, Fe, Cu or Ni play an essential role in normal plant growth and development as they are involved in different physiological processes that may be, however, disrupted by metal deficiency or excess. Therefore, to regulate metal uptake, translocation and accumulation plants have developed diverse mechanisms including the production of low molecular mass metal binding metabolites. The knowledge of these forms of metals and the processes they undergo in plants can be used in environmental, nutrition and toxicological studies. However, this knowledge was very limited as there was a lack of methodology that could be successfully applied to investigate trace metal speciation in plants. Therefore, the aim of this study was the development of the methodology for the analysis of metal species in complex plant samples. The novel approach is based on the use of combination of (i) HPLC – ICP MS coupling allowing the detection of numerous, often low concentrated, metal-containing species with (ii) a parallel identification using HPLC – electrospray Orbitrap MS/MS coupling. The developed approach allowed the identification of (i) ca. 60 different, mainly previously unreported metal species in saps of Pisum Sativum (green pea) and (ii) several mixed iron – aluminum – citrate complexes in Plantago almogravensis. This developed methodology was also applied to (iii) investigate selenium speciation in Brassica nigra allowing the identification of more than 30 selenium-containing low molecular mass compounds
García, Pérez Alejandro. "Instalación de una planta moderna de anodizado para perfiles de aluminio." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2006. https://hdl.handle.net/20.500.12672/550.
Full textTesis
Banhos, Otávia Faria dos Anjos Abdo. "Aspectos fisiológicos e nutricionais do alumínio em duas espécies cítricas e uma de cerrado em cultivo com solução nutritiva /." Rio Claro, 2016. http://hdl.handle.net/11449/144219.
Full textBanca: Francisco Antonio Monteiro
Banca: Victor Alexandre Vitorello
Banca: José Lavres Junior
Banca: Paulo Eduardo Ribeiro Marchiori
Resumo: O alumínio (Al3+) é tóxico para a maioria das plantas e é um fator limitante para o crescimento das plantas e para a produtividade das culturas em todo o mundo. Os efeitos do Al foram estudados em plantas de laranjeira-doce (Citrus sinensis L. Osbeck) enxertadas em porta-enxerto sensível ao Al, o limoeiro (Citrus limonia cv. 'Cravo'), em uma espécie nativa do Cerrado não-acumuladora de Al (Styrax camporum) e em limoeiro 'Cravo' não enxertado. Foram estudadas doses de Al (0, 185, 370, 555 e 740 M Al) em plantas cultivadas em areia e em solução nutritiva pH 4.0 contendo 0 e 1480 M, o acúmulo de Al nos órgãos desses genótipos, as trocas gasosas, o desempenho fotoquímico da clorofila a e o potencial da água na folha. A composição qímica nominal dessa solução foi testada pelo software Geochem-EZ e resultou em mais de 85% de Al3+ livre disponível. Nas raízes, estudamos as alterações anatômicas. Todos esses parâmetros foram estudados em resposta à perturbação causada pelo Al no ambiente radicular. Para causar perturbação em laranjeiras enxertadas em limoeiro 'Cravo', a disponibilidade de Al no substrato deve ser maior que 55%. Solução nutritiva contendo até 1480 M Al causa alterações fisiológicas em limoeiro 'Cravo' após 45 dias e esta concentração de Al em solução é toxica para as plantas de Styrax camporum
Abstract: Aluminum (Al3+) is toxic to most plants and is a factor limiting plant growth and crop yields throughout the world. Aluminum effects were studied in sweet-orange (Citrus sinensis L. Osbeck) plants grafted on 'Rangpur' lime (Citrus limonia), an Al-sensitive plant, in a non-Al-accumulating plant (Styrax camporum) from the Cerrado vegetation, and also in non-grafted 'Rangpur' lime plants. Plants under increasing Al concentrations (0, 185, 370, 555 and 740 M Al), which were cultivated in sand and plants cultivated directly in nutrient solutions containing 0 and 1480 M Al were used for studying the accumulation of Al in their organs, gas exchange, chlorophyll photochemical performance and leaf water potential. The nominal chemical composition of this solution was tested on Geochem-EZ software, and it resulted in more than 85% free Al3+ available. Anatomical alterations were also studied in roots. All these parameters were studied in response to the Al disturbance in the root environment. Aluminum availability in the substrate must be higher than 55% to cause disturbances in sweet-orange plants grafted on 'Rangpur' lime rootstocks. Nutrient solution containing up to 1480 M Al cause physiological alterations in non-grafted 'Rangpur' lime plants after 45 days, and this Al concentration is toxic to Styrax camporum plants
Doutor
Klug, Benjamin [Verfasser]. "Aluminium uptake, translocation and accumulation in the aluminium accumulating plant species buckwheat (Fagopyrum esculentum Moench) / Benjamin Klug." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover, 2010. http://d-nb.info/1008409480/34.
Full textWestberg, Håkan. "Chemical exposures, biological monitoring and cancer risks in Swedish aluminium foundries and remelting plants /." Linköping : Univ, 2001. http://www.bibl.liu.se/liupubl/disp/disp2001/med696s.pdf.
Full textSchmitt, Marco [Verfasser]. "Aluminium accumulation in tropical and temperate plants: ecological, physiological and evolutionary aspects / Marco Schmitt." Ulm : Universität Ulm, 2017. http://d-nb.info/1132713145/34.
Full textFung, Ka Fai. "Effects of agronomic practices on aluminium and fluoride concentrations in soil and tea plants." HKBU Institutional Repository, 1999. http://repository.hkbu.edu.hk/etd_ra/244.
Full textKopittke, Peter Martin. "Limitations to plant root growth in highly saline and alkaline bauxite residue /." [St. Lucia, Qld.], 2004. http://adt.library.uq.edu.au/public/adt-QU20040913.094109/index.html.
Full textChen, Danying. "Revêtements multicouches à base de nitrure d'aluminium pour les récepteurs des systèmes solaires à concentration." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI079.
Full textThere is an increasing interest for concentrated solar power (CSP) systems which can work at temperatures higher than 1000 °C to optimize efficiency. One of the challenges is to design the receiver that will be heated at high temperature in air. Compared to coatings in gas turbine engine, the coating(s)/substrate system must have a high thermal conductivity to ensure a good heat transfer to the fluid. Aluminum nitride (AlN) coating, deposited by chemical vapor deposition at 1100-1200 °C at a growth rate of 10-50 µm·h-1, is selected for its high thermal conductivity, low thermal expansion coefficient, high temperature stability and its ability to develop stable alumina scales above 1000 °C. Molybdenum-based alloys are selected as substrate materials for their excellent thermal and mechanical properties. The alumina-forming iron-based alloys are also chosen as model substrates to reduce the influencing parameters in real-life receivers and to study the potential of these coatings. Accelerated cyclic oxidation tests and emissivity measurements allow the evaluation of AlN coatings as materials for high temperature CSP receivers. The multilayered systems exhibit low degradation after hundreds of thermal cycles at 800 °C in air and can support higher temperatures (1100 °C) for 100 to 500 h depending on the coating thickness. Nevertheless, the fast cyclic oxidation in solar furnace leads to cracks through the coatings. An analytical model is developed to study the stress evolution within the coating(s)/substrate system. Calculated results are in good agreement with experimental data. The measurements of the optical properties reveal a decrease of absorptivity after oxidation for AlN coatings, but a significant increase of absorptivity when SiC coating is added as a top layer
Fichtner, Elizabeth Jeanne. "Abiotic pathogen suppression physiology and biology of aluminum toxicity to soilborne fungi /." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-10222003-020101/.
Full textAhonen-Jonnarth, Ulla. "Growth, nutrient uptake and ectomycorrhizal function in Pinus sylvestris plants exposed to aluminium and heavy metals /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5864-1.pdf.
Full textBoulesteix, Claire. "Synthesis, environmental degradation and repairability of slurry aluminium coatings elaborated on steels employed in power plants." Thesis, La Rochelle, 2017. http://www.theses.fr/2017LAROS022/document.
Full textHigher energy efficiencies can be achieved by the increase of temperatures and pressures in power plant, thus allowing the reduction of the polluting emissions. Therefore, more efficient materials, compared to those currently employed, have to be used in order to resist to harsh environmental conditions (high temperatures, steam, pressure…). Despite of the good mechanical properties of many steels, the elaboration of a protective coating able to form a dense, protective and stable oxide layer at high temperature, is necessary. Thus, in the framework of the “POEMA” European project, the mechanisms of the formation of aluminium diffusion coatings were studied on ferritic-martensitic and austenitic stainless steels that are currently employed in power plants. The sealing of cracks eventually created during the aluminisation of steels was also studied. The degradation mechanisms of the B2-(Fe (Ni))Al coatings were then studied in steam and in air at 650 and 700°C up to 10000 hours and under different pressures (1 and 300 bar). We have demonstrated that the pre-oxidation induced during the elaboration of coatings grew a thin protective oxide scale composed of α-Al2O3 which developed further upon oxidation. Nevertheless, the long exposures under high steam pressures promoted the cationic diffusion of Fe, thus allowing the formation of small surface oxide nodules. Finally, the dissolution mechanisms of coatings with a diluted acid have been studied in order to demonstrate the possibility of strip and realuminise the materials initially coated
Miftahudin. "High resolution map of the aluminum tolerance gene (Alt3) region in rye (Secale cereale L.) /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074428.
Full textRocha, Gisele de Araujo. "Síntese e caracterização de hidróxidos de alumínio com duas dimensões nanométricas (morfologia fibrilar) ou com uma dimensão nanométrica (morfologia de placas/lâminas)." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-26062014-160610/.
Full textThe synthesis of nanoparticles with controlled morphology is of increasing interests in the field of Materials Science. Due to this motivation, the main objective was the synthesis and characterization of boehmite pseudoboehmite presenting one or two nanoscale dimensions. The method of synthesis used to obtain fibrillar pseudoboehmite is based on the reaction of an aluminum alkoxide in aqueous acetic acid. For the preparation of boehmite, a single synthesis method, the hydrothermal synthesis, was used with three different precursors: a pseudoboehmite, an organic salt (aluminum monohydroxide diacetate) and the aluminum trihydroxide gibbsite, the latter in two forms: a commercial gibbsite and a gibbsite synthesized that utilizes iodine as activator. The pseudoboehmites and boehmites obtained were characterized by X-ray diffraction and scanning electron microscopy. Some samples of pseudoboehmite and boehmite were characterized by differential thermal analysis and by vibrational spectroscopy in the infrared region. Pseudoboehmites were obtained with fibrillar morphology (anisometric elongated particles); for boehmites, different morphologies were produced (according to the precursor and the synthesis conditions employed in their production): fibrillar (two dimensions in nanoscale), nanoplates (one dimension in nanoscale) and particles with cubic symmetry (no dimensions in nanoscale). The presence of acetate ion in hydrothermal synthesis was instrumental in the formation of boehmite with plate morphology.
Szota, Christopher. "Root morphology, photosynthesis, water relations and development of jarrah (Eucalyptus marginata) in response to soil constraints at restores bauxite mines in south-western Australia." University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0058.
Full textGarzón, López Teresa. "Estudio de la compartimentación celular en plantas modelo sometidas a estrés por aluminio." Doctoral thesis, Universitat Autònoma de Barcelona, 2004. http://hdl.handle.net/10803/3661.
Full textLa inhibición del crecimiento radicular es uno de los primeros parámetros afectados por la exposición al aluminio.
En nuestro estudio usamos 4 variedades de Phaseolus vulgaris y 2 de Zea mays de distinto origen para evaluar los efectos comparativamente tanto entre monocotiledóneas y dicotiledóneas como entre variedades de diferente procedencia.
Se propone una nueva técnica para la definición de la tolerancia al metal en función a los daños en la permeabilidad de la membrana basándonos en los resultados de la tinción vital Los resultados muestran que la acumulación de aluminio en el apoplasto y los daños en la permeabilidad de la membrana son importantes factores que determinan la toxicidad del metal. Se clasifican las variedades en función a su tolerancia al metal, determinándose una relación origen-tolerancia en las variedades de maíz, relación que no se observó en las variedades de judía..
Dada la importancia de la exudación de ácidos orgánicos como mecanismo de evitación frente a los efectos tóxicos del aluminio, se analizó el contenido de malato en la vacuola de las plantas, además de otros iones relacionados con este proceso e importantes para el metabolismo de la planta como NO3-, mediante electroforesis capilar y K y P, mediante microscopia de rayos X, y el calcio citoplasmático, usándose un fluorocromo específico para el catión (Fluo-3). Se observó un comportamiento diferencial entre las dos variedades de maíz estudiadas en este experimento en función a la formación de novo de malato, viéndose además un comportamiento del K muy relacionada con un papel de contraión. Los movimientos de NO3-, parecen un movimiento electrosmótico compensatorio y los de P una consecuencia de las alteraciones que provoca el aluminio en la planta. El calcio libre en ambas variedades muestra un comportamiento contrarío, de manera que parece que hay un mejor aprovechamiento del calcio citoplasmático por parte de la variedad más resistente.
Aluminium is the third most abundant metal in the Earth crust. It is an important factor limiting crop growth in acidic soils (pH<4.5, which means about 40% of the cropping lands) due to its high solubility and availability to plants under these conditions, being root growth inhibition one of the first affected parameters by exposure to Al.
In our experiment we used four varieties of Phaseolus vulgaris and two of Zea mays from different origin to compare so the effects between monocotyledoneous and dicotyledoneous species as well as the effects between the different provenance.
A new technique to define the potential tolerance to aluminium is proposed. This new technique takes into consideration the damage caused in the plasma membrane by aluminium using vital staining techniques. The experimental data showed that aluminium accumulation in the apoplast and permeability damages in the plasma membrane are very important factors in determining aluminium toxicity and let us to classify the cultivars according to its tolerance showing a close relation between the provenance and tolerance in Z. mays, which could not be seen in P. vulgaris.
Considering the importance of organic acids efflux as an avoiding mechanism against the toxics effects of the metal, we analyzed vacuolar contents of several ions related to this mechanism e.g. NO3- (by capillary electrophoresis), K and P (by X ray microscopy) and cytoplasmic calcium (by staining with fluo-3).
We saw a different behaviour between the two varieties of Z.mays in the induction of malate. Besides, K showed a behaviour compatible with being a counter ion in the organic acid efflux mechanism, while fluctuations in vacuolar P content seem to be a consequence of aluminium damage of cell metabolism.
Nitrate movements seem to be an electro-osmotic behaviour to compensate the K transport outside the vacuole.
Both varieties showed an opposed behaviour in the free calcium concentration due to a better optimization of calcium by the more tolerant variety.
Maron, Lyza Gontow. "Caracterização molecular de Zmal1 : um gene induzido por aluminio em plantas de milho." [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317051.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-07-26T19:37:35Z (GMT). No. of bitstreams: 1 Maron_LyzaGontow_M.pdf: 2238825 bytes, checksum: 4a67ca7cb16ababccc6f8418622be2c0 (MD5) Previous issue date: 2000
Mestrado
Souza, Marcelo Claro de [UNESP]. "Nutrição mineral e escleromorfismo foliar de grupos funcionais e comunidades vegetais savânicas." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/108718.
Full textFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
As savanas (localizadas na Austrália, África do Sul e Brasil) abrigam a segunda maior biodiversidade do planeta. Tais savanas se desenvolveram sobre solos ácidos, pobres em nutrientes e com estações secas e chuvosas bem definidas. Dentre os filtros ecológicos limitantes à manutenção das savanas, fogo, fertilidade do solo, disponibilidade hídrica e herbivoria são considerados os mais importantes. Outros filtros muito importantes, mas considerados subfiltros da fertilidade do solo são: acidez do solo e disponibilidade de alumínio (Al). O Al é considerado um elemento tóxico para a maior parte das plantas, entretanto as espécies savânicas são consideradas insensíveis ao Al, sendo algumas espécies inclusive acumuladoras. Desta forma, foi estudado o perfil nutricional, acúmulo de Al e escleromorfismo foliar de espécies savânicas em três níveis: regional, nacional e intercontinental. Para os níveis nacional e intercontinental acrescentamos as variações de pluviosidade anual, fertilidade e acidez do solo. Em nível regional comparamos as variações no grau de escleromorfismo, concentração de nutrientes foliares, acúmulo de Al, fenologia e produção de metabólitos secundários em folhas jovens e maduras de espécies acumuladoras e não acumuladoras de Al em um fragmento de cerrado em Itirapina – SP. Em nível nacional comparamos as variações das concentrações de nutrientes foliares, acúmulo de Al e escleromorfismo foliar entre dois fragmentos de cerrado sensu stricto (s. str.): um na região central (Brasília – DF) e o outro na borda sudeste do cerrado (Itirapina – SP). Em escala global, estudamos as variações nutricionais, acúmulo de Al e escleromorfismo foliar entre as savanas Australiana, Brasileira e Sul Africana. Em escala regional observamos dois padrões distintos de desenvolvimento foliar entre os dois grupos de espécies. Em escala nacional, observamos menor ecleromorfismo e maior acúmulo...
Savannas (located in Australia, Brazil and South Africa) hold the second largest biodiversity on the planet. These savannas have developed their vegetation structure on acidic and nutrient-poor soils, under a well-defined dry and rainy seasons. Among the limiting ecological filters, fire, soil fertility, water availability and herbivory are considered the most important ones. Other filters, which may be considered subfilters of the soil fertility are acidity and aluminum (Al) availability in the soil. Aluminum is considered a toxic element for most plant species, however savanna plants are insensitive to Al, and some species are Al-accumulators. We studied leaf nutritional status, Al accumulation and leaf scleromorphism of savanna species at three levels: regional, national and intercontinental. For national and intercontinental analysis we evaluated variations in the annual 9 rainfall, soil fertility and soil acidity. At the regional level, we compared leaf scleromorphism, nutritional status, Al accumulation, leaf phenology and the concentration of secondary metabolites in young and mature leaves of Al-accumulator and non-accumulator species in a cerrado remnant in Itirapina-SP. At the national level we compared the nutritional status, Al accumulation and leaf scleromorphism variations between two cerrado sensu stricto (s. str.) fragments:, one in the core region (Brasília - DF) and another on the southeastern periphery of the cerrado (Itirapina - SP). On a global scale, we studied the dissimilarities on the nutritional status, Al accumulation and leaf scleromorphism between the Australian, Brazilian and South African savannas. At the regional level, we observed two distinct strategies of leaf development between Al-accumulator and non-accumulator species. At the national level, we concluded that the peripheral cerrado community was less scleromorphic than the community in the core. These variations were explained by the higher soil...
FAPESP: 10/07809-1
FAPESP: 2012/13762-3
CAPES: 360/11
Souza, Marcelo Claro de. "Nutrição mineral e escleromorfismo foliar de grupos funcionais e comunidades vegetais savânicas /." Rio Claro, 2014. http://hdl.handle.net/11449/108718.
Full textCoorientador: Leonor Patricia Cerdeira Morellato
Banca: Francisco Antonio Monteiro
Banca: Milton Cezar Ribeiro
Banca: Davi Rodrigo Rossatto
Banca: Marco Antonio Portugal L. Batalha
Resumo: As savanas (localizadas na Austrália, África do Sul e Brasil) abrigam a segunda maior biodiversidade do planeta. Tais savanas se desenvolveram sobre solos ácidos, pobres em nutrientes e com estações secas e chuvosas bem definidas. Dentre os filtros ecológicos limitantes à manutenção das savanas, fogo, fertilidade do solo, disponibilidade hídrica e herbivoria são considerados os mais importantes. Outros filtros muito importantes, mas considerados subfiltros da fertilidade do solo são: acidez do solo e disponibilidade de alumínio (Al). O Al é considerado um elemento tóxico para a maior parte das plantas, entretanto as espécies savânicas são consideradas insensíveis ao Al, sendo algumas espécies inclusive acumuladoras. Desta forma, foi estudado o perfil nutricional, acúmulo de Al e escleromorfismo foliar de espécies savânicas em três níveis: regional, nacional e intercontinental. Para os níveis nacional e intercontinental acrescentamos as variações de pluviosidade anual, fertilidade e acidez do solo. Em nível regional comparamos as variações no grau de escleromorfismo, concentração de nutrientes foliares, acúmulo de Al, fenologia e produção de metabólitos secundários em folhas jovens e maduras de espécies acumuladoras e não acumuladoras de Al em um fragmento de cerrado em Itirapina - SP. Em nível nacional comparamos as variações das concentrações de nutrientes foliares, acúmulo de Al e escleromorfismo foliar entre dois fragmentos de cerrado sensu stricto (s. str.): um na região central (Brasília - DF) e o outro na borda sudeste do cerrado (Itirapina - SP). Em escala global, estudamos as variações nutricionais, acúmulo de Al e escleromorfismo foliar entre as savanas Australiana, Brasileira e Sul Africana. Em escala regional observamos dois padrões distintos de desenvolvimento foliar entre os dois grupos de espécies. Em escala nacional, observamos menor ecleromorfismo e maior acúmulo...
Abstract: Savannas (located in Australia, Brazil and South Africa) hold the second largest biodiversity on the planet. These savannas have developed their vegetation structure on acidic and nutrient-poor soils, under a well-defined dry and rainy seasons. Among the limiting ecological filters, fire, soil fertility, water availability and herbivory are considered the most important ones. Other filters, which may be considered subfilters of the soil fertility are acidity and aluminum (Al) availability in the soil. Aluminum is considered a toxic element for most plant species, however savanna plants are insensitive to Al, and some species are Al-accumulators. We studied leaf nutritional status, Al accumulation and leaf scleromorphism of savanna species at three levels: regional, national and intercontinental. For national and intercontinental analysis we evaluated variations in the annual 9 rainfall, soil fertility and soil acidity. At the regional level, we compared leaf scleromorphism, nutritional status, Al accumulation, leaf phenology and the concentration of secondary metabolites in young and mature leaves of Al-accumulator and non-accumulator species in a cerrado remnant in Itirapina-SP. At the national level we compared the nutritional status, Al accumulation and leaf scleromorphism variations between two cerrado sensu stricto (s. str.) fragments:, one in the core region (Brasília - DF) and another on the southeastern periphery of the cerrado (Itirapina - SP). On a global scale, we studied the dissimilarities on the nutritional status, Al accumulation and leaf scleromorphism between the Australian, Brazilian and South African savannas. At the regional level, we observed two distinct strategies of leaf development between Al-accumulator and non-accumulator species. At the national level, we concluded that the peripheral cerrado community was less scleromorphic than the community in the core. These variations were explained by the higher soil...
Doutor
Coscione, Aline Renee. "O uso de calibração multivariada para a determinação espectrofotometrica simultanea de aluminio e ferro : aplicação na analise de plantas e solos." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250596.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
Made available in DSpace on 2018-07-28T20:20:48Z (GMT). No. of bitstreams: 1 Coscione_AlineRenee_D.pdf: 5651148 bytes, checksum: df0582f113d22a12bcf95fd12b2ffcf9 (MD5) Previous issue date: 2001
Doutorado