Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato
Ano de defesa: | 2014 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal Rural do Rio de Janeiro
|
Programa de Pós-Graduação: |
Programa de P?s-Gradua??o em Agronomia - Ci?ncia do Solo
|
Departamento: |
Instituto de Agronomia
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | https://tede.ufrrj.br/jspui/handle/jspui/2987 |
Resumo: | Nitrogen (N) is one of the elements most required by plants, and it constitutes the structure of the main macromolecules of the biological systems. In order to increase the grain yield, large amounts are applied in the soil. However, up to 50 to 70% of N applied maybe lost by several processes. To identify biochemistry and molecular mechanisms that might to increase nitrogen use efficiency (NUE) by plants is one of greatest challenges in plant mineral nutrition nowadays. Several molecular techniques have been used in order to study different genotypes related to NUE and to identify potential biotechnological targets for this characterisitic. Lately, it has been noted that aspects related to the control of gene expression, more precise the epigenetic, explains great part of the plant adaptation to stress. This study had as objective to identify the changes of the DNA methylation pattern in four rice varieties with different protein content in the grains, when submitted to high and low nitrate availability conditions. The gene expression of nitrate transporters and the nitrogen metabolites were also evaluated. During the experiment period, the N availability influenced in the DNA methylation pattern, and it showed polymorphism among the rice varieties in the two dosages of nitrate. The rice plants under low nitrogen availability (0.2 mM) showed predominance of the CHG type methylation, whereas when submitted to high availability (2 mM) they showed predominance of CG methylation. The higher expression of high affinity nitrate transporters was observed in the Piau? variety. The Piau? and Manteiga varieties showed an increase in the root shoot ratio, the highest nitrate amount in the sheath and root, the highest amino N, ammonium and total N amount, when submitted to low nitrate availability. The Piau? and Manteiga varieties originated from Maranh?o State, where they are grown with low usage of fertilizers by subsistence crop farmers. This way, it is possible that this study results reflect the adaptation of this rice plants to limiting N soil conditions. |
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Souza, Sonia Regina de003.927.487-03Bucher, Carlos Alberto055.869.347-44Souza, Sonia Regina deSantos, Andr? Marques dosSanta-Catarina, Claudete106.225.477-55http://lattes.cnpq.br/6088215544085967Arruda, Leilson Novaes2019-10-22T20:38:01Z2014-02-21ARRUDA, Leilson Novaes. Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato. 2014. 51 f. Disserta??o (Mestrado em Agronomia, Ci?ncia do Solo) - Instituto de Agronomia, Departamento de Solos, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2014.https://tede.ufrrj.br/jspui/handle/jspui/2987Nitrogen (N) is one of the elements most required by plants, and it constitutes the structure of the main macromolecules of the biological systems. In order to increase the grain yield, large amounts are applied in the soil. However, up to 50 to 70% of N applied maybe lost by several processes. To identify biochemistry and molecular mechanisms that might to increase nitrogen use efficiency (NUE) by plants is one of greatest challenges in plant mineral nutrition nowadays. Several molecular techniques have been used in order to study different genotypes related to NUE and to identify potential biotechnological targets for this characterisitic. Lately, it has been noted that aspects related to the control of gene expression, more precise the epigenetic, explains great part of the plant adaptation to stress. This study had as objective to identify the changes of the DNA methylation pattern in four rice varieties with different protein content in the grains, when submitted to high and low nitrate availability conditions. The gene expression of nitrate transporters and the nitrogen metabolites were also evaluated. During the experiment period, the N availability influenced in the DNA methylation pattern, and it showed polymorphism among the rice varieties in the two dosages of nitrate. The rice plants under low nitrogen availability (0.2 mM) showed predominance of the CHG type methylation, whereas when submitted to high availability (2 mM) they showed predominance of CG methylation. The higher expression of high affinity nitrate transporters was observed in the Piau? variety. The Piau? and Manteiga varieties showed an increase in the root shoot ratio, the highest nitrate amount in the sheath and root, the highest amino N, ammonium and total N amount, when submitted to low nitrate availability. The Piau? and Manteiga varieties originated from Maranh?o State, where they are grown with low usage of fertilizers by subsistence crop farmers. This way, it is possible that this study results reflect the adaptation of this rice plants to limiting N soil conditions.O nitrog?nio (N) ? um dos elementos mais requeridos pelas plantas, sendo constituinte das principais mol?culas dos sistemas biol?gicos. Portanto, grandes quantidades s?o aplicadas no solo com o intuito de maximizar a produtividade. Entretanto at? 70% do N aplicado pode ser perdido por diferentes processos. Assim, identificar mecanismos bioqu?micos e moleculares que possam aumentar a efici?ncia no uso do nitrog?nio (EUN) pelas plantas ? atualmente um dos principais desafios da nutri??o mineral de plantas. Diversas t?cnicas moleculares t?m sido usadas para estudar gen?tipos contrastantes quanto a EUN e identificar poss?veis alvos biotecnol?gicos para essa caracter?stica. Ultimamente, tem sido observado que aspectos relacionados ao controle da express?o g?nica, ou mais precisamente a epigen?tica, explica grande parte da adapta??o das plantas frente a uma situa??o de estresse. Deste modo, esse trabalho teve como objetivo identificar as altera??es no padr?o de metila??o do DNA em variedades de arroz contrastantes quanto ao teor de prote?na nos gr?os quando submetidas a alta e baixa dose de nitrato (N-NO3-). A express?o genica dos transportadores de NO3- e os metab?litos nitrogenados foram tamb?m avaliados. A disponibilidade de N durante o cultivo influenciou os padr?es de metila??o do DNA, que apresentou polimorfismo entre as variedades nas duas doses de N-NO3- estudadas. As plantas de arroz sob baixa disponibilidade de N (0,2 mM constante) apresentaram predom?nio de metila??o do tipo CHG, enquanto que sob alta disponibilidade (2 mM constante) houve predom?nio de metila??o do tipo CG. A maior express?o de transportadores de NO3- de alta afinidade HATS ocorreu na variedade local Piau?. As variedades Piau? e Manteiga apresentaram aumento na rela??o raiz parte a?rea, maior ac?mulo de NO3- na bainha e raiz, maiores teores de N- amino, NH4+ e N total quando submetidas a baixa disponibilidade de N. As variedades Piau? e Manteiga s?o oriundas de cultivos com baixo uso de insumos por agricultores de subsist?ncia do estado do Maranh?o, e possivelmente os resultados encontrados aqui s?o reflexos da adapta??o dessas variedades a condi??es de solo limitantes de N.Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2019-10-22T20:38:01Z No. of bitstreams: 1 2014 - Leilson Novaes Arruda.pdf: 1284947 bytes, checksum: ee8b07d0a49b7305958e6cbc05903092 (MD5)Made available in DSpace on 2019-10-22T20:38:01Z (GMT). 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dc.title.por.fl_str_mv |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
dc.title.alternative.eng.fl_str_mv |
Differential DNA methylation and nitrogen metabolism in rice plants submitted to high and low nitrate availability |
title |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
spellingShingle |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato Arruda, Leilson Novaes Express?o g?nica Metab?litos nitrogenados Metila??o da citosina Gene expression Nitrogen metabolites Citosine methylation Agronomia |
title_short |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
title_full |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
title_fullStr |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
title_full_unstemmed |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
title_sort |
Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato |
author |
Arruda, Leilson Novaes |
author_facet |
Arruda, Leilson Novaes |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Souza, Sonia Regina de |
dc.contributor.advisor1ID.fl_str_mv |
003.927.487-03 |
dc.contributor.advisor-co1.fl_str_mv |
Bucher, Carlos Alberto |
dc.contributor.advisor-co1ID.fl_str_mv |
055.869.347-44 |
dc.contributor.referee1.fl_str_mv |
Souza, Sonia Regina de |
dc.contributor.referee2.fl_str_mv |
Santos, Andr? Marques dos |
dc.contributor.referee3.fl_str_mv |
Santa-Catarina, Claudete |
dc.contributor.authorID.fl_str_mv |
106.225.477-55 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6088215544085967 |
dc.contributor.author.fl_str_mv |
Arruda, Leilson Novaes |
contributor_str_mv |
Souza, Sonia Regina de Bucher, Carlos Alberto Souza, Sonia Regina de Santos, Andr? Marques dos Santa-Catarina, Claudete |
dc.subject.por.fl_str_mv |
Express?o g?nica Metab?litos nitrogenados Metila??o da citosina |
topic |
Express?o g?nica Metab?litos nitrogenados Metila??o da citosina Gene expression Nitrogen metabolites Citosine methylation Agronomia |
dc.subject.eng.fl_str_mv |
Gene expression Nitrogen metabolites Citosine methylation |
dc.subject.cnpq.fl_str_mv |
Agronomia |
description |
Nitrogen (N) is one of the elements most required by plants, and it constitutes the structure of the main macromolecules of the biological systems. In order to increase the grain yield, large amounts are applied in the soil. However, up to 50 to 70% of N applied maybe lost by several processes. To identify biochemistry and molecular mechanisms that might to increase nitrogen use efficiency (NUE) by plants is one of greatest challenges in plant mineral nutrition nowadays. Several molecular techniques have been used in order to study different genotypes related to NUE and to identify potential biotechnological targets for this characterisitic. Lately, it has been noted that aspects related to the control of gene expression, more precise the epigenetic, explains great part of the plant adaptation to stress. This study had as objective to identify the changes of the DNA methylation pattern in four rice varieties with different protein content in the grains, when submitted to high and low nitrate availability conditions. The gene expression of nitrate transporters and the nitrogen metabolites were also evaluated. During the experiment period, the N availability influenced in the DNA methylation pattern, and it showed polymorphism among the rice varieties in the two dosages of nitrate. The rice plants under low nitrogen availability (0.2 mM) showed predominance of the CHG type methylation, whereas when submitted to high availability (2 mM) they showed predominance of CG methylation. The higher expression of high affinity nitrate transporters was observed in the Piau? variety. The Piau? and Manteiga varieties showed an increase in the root shoot ratio, the highest nitrate amount in the sheath and root, the highest amino N, ammonium and total N amount, when submitted to low nitrate availability. The Piau? and Manteiga varieties originated from Maranh?o State, where they are grown with low usage of fertilizers by subsistence crop farmers. This way, it is possible that this study results reflect the adaptation of this rice plants to limiting N soil conditions. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-02-21 |
dc.date.accessioned.fl_str_mv |
2019-10-22T20:38:01Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
ARRUDA, Leilson Novaes. Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato. 2014. 51 f. Disserta??o (Mestrado em Agronomia, Ci?ncia do Solo) - Instituto de Agronomia, Departamento de Solos, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2014. |
dc.identifier.uri.fl_str_mv |
https://tede.ufrrj.br/jspui/handle/jspui/2987 |
identifier_str_mv |
ARRUDA, Leilson Novaes. Metila??o diferencial do DNA e metabolismo do nitrog?nio em variedades de arroz submetidas a alto e baixo suprimento de nitrato. 2014. 51 f. Disserta??o (Mestrado em Agronomia, Ci?ncia do Solo) - Instituto de Agronomia, Departamento de Solos, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2014. |
url |
https://tede.ufrrj.br/jspui/handle/jspui/2987 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural do Rio de Janeiro |
dc.publisher.program.fl_str_mv |
Programa de P?s-Gradua??o em Agronomia - Ci?ncia do Solo |
dc.publisher.initials.fl_str_mv |
UFRRJ |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Instituto de Agronomia |
publisher.none.fl_str_mv |
Universidade Federal Rural do Rio de Janeiro |
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