Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFPel - Guaiaca |
Texto Completo: | http://guaiaca.ufpel.edu.br/handle/123456789/2074 |
Resumo: | Hydromorphic soils present as main feature a reduced natural drainage ability, being mostly used for growing irrigated rice. Thus, the occurrence of anaerobic conditions associated to the presence of organic matter enables the development of anaerobic microorganisms which, while decomposing the organic matter, generate phytotoxic substances represented mainly by short chain aliphatic organic acids. The selection of promising genotypes adapted for use in these situations requires complicated field evaluations, which can be simulated under hydroponic culture. The research was composed of four articles that had as major goals to establish an adequate methodology for growing rice under organic acid rich hydroponic culture. The first work aimed at determining the range of concentrations and response variables most indicated for evaluating rice genotypes under hydroponics. The effects of six different concentrations for the three major acids formed in the soil: acetic (0; 4; 8; 12; 16 and 20 mM), propionic (0; 3; 6; 9; 12 and 15 mM) and butyric (0; 2; 4; 6; 8 and 10 mM) acids in two genotypes of high divergence (BRS 7-TAIM and SAIBAN). The results indicated that the most adequate concentration range for organic acid studies in rice are between 15.8 and 8.4; 9.1 and 4.2 and 7.7 and 3.7 mM for acetic, propionic and butyric acids, respectively. Also, the most responsive variable was root length. The second experiment had as goal to determine, under hydroponics, the influence of the pH level used in the hydroponic solution on the phytotoxicity caused by acetic, propionic and butyric acids in rice, as well as the performance of some variables currently used in studies of abiotic stress tolerance in hydroponic systems. For this experiment, three acids (acetic, propionic and butyric) and four pH (4.0; 5.0; 6.0 and 7.0) levels were evaluated. The results allow one to conclude that reduced pH levels increase the phytotoxicity of all acids. The root and shoot lengths have independent behavior from the acid used, as opposite to root number and root and shoot dry matter. Root length was the variable most affected by the treatments. The third article had as objective to evaluate the response of 25 rice genotypes to the phytotoxic effect of acetic, propionic and butyric acids, individually. In this work, 4 treatments were used for each acid: 0 (control); 4; 8 and 12 mM for acetic; 0; 3; 6 and 9 mM for propionic and 0; 2; 4 and 6 mM for butyric acid, respectively. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter. The relative performance of the variable CR was the most affected by the acids and the regressions established for this variable revealed ix ix tolerant and sensitive genotypes to organic acids, with 6; 6 and 9 tolerant genotypes for acetic, propionic and butyric acids, respectively. It was observed a higher number of tolerant genotypes on the japonica than on the indica group. The fourth experiment had as objective to evaluate the response of 20 rice cultivars to the interactive phytotoxic effect of acetic, propionic and butyric acids. In these work, four treatments, 0 (control); 3; 6 and 9 mM were used, consisting of the mixture of three acids (acetic, propionic and butyric) at a 6:3:1 ratio. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter, phosphorus (P) and potassium (K) content. The results indicated significant differences between the genotypes evaluated for the characters CR, CPA, P and K. Four genotypes were ranked as tolerants. The variable CR associated to CPA, P and K are indicated for the selection of tolerant genotypes. The results obtained allowed one to establish an adequate methodology for the selection of rice genotypes under hydroponic systems combined with organic acid stress (acetic, propionic and butyric) as well as to select promising genotypes regarding their response to this stress. |
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http://lattes.cnpq.br/7612079051748634http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780819H4Sousa, Rogerio Oliveira dehttp://lattes.cnpq.br/0190845387852451Oliveira, Antonio Costa deKopp, Mauricio Marini2014-08-20T14:06:13Z2008-08-202014-08-20T14:06:13Z2008-04-07KOPP, Mauricio Marini. Organic acid related stress responses in rice (Oryza sativa L.) genotypes under ambient controlled conditions. 2008. 120 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008.http://guaiaca.ufpel.edu.br/handle/123456789/2074Hydromorphic soils present as main feature a reduced natural drainage ability, being mostly used for growing irrigated rice. Thus, the occurrence of anaerobic conditions associated to the presence of organic matter enables the development of anaerobic microorganisms which, while decomposing the organic matter, generate phytotoxic substances represented mainly by short chain aliphatic organic acids. The selection of promising genotypes adapted for use in these situations requires complicated field evaluations, which can be simulated under hydroponic culture. The research was composed of four articles that had as major goals to establish an adequate methodology for growing rice under organic acid rich hydroponic culture. The first work aimed at determining the range of concentrations and response variables most indicated for evaluating rice genotypes under hydroponics. The effects of six different concentrations for the three major acids formed in the soil: acetic (0; 4; 8; 12; 16 and 20 mM), propionic (0; 3; 6; 9; 12 and 15 mM) and butyric (0; 2; 4; 6; 8 and 10 mM) acids in two genotypes of high divergence (BRS 7-TAIM and SAIBAN). The results indicated that the most adequate concentration range for organic acid studies in rice are between 15.8 and 8.4; 9.1 and 4.2 and 7.7 and 3.7 mM for acetic, propionic and butyric acids, respectively. Also, the most responsive variable was root length. The second experiment had as goal to determine, under hydroponics, the influence of the pH level used in the hydroponic solution on the phytotoxicity caused by acetic, propionic and butyric acids in rice, as well as the performance of some variables currently used in studies of abiotic stress tolerance in hydroponic systems. For this experiment, three acids (acetic, propionic and butyric) and four pH (4.0; 5.0; 6.0 and 7.0) levels were evaluated. The results allow one to conclude that reduced pH levels increase the phytotoxicity of all acids. The root and shoot lengths have independent behavior from the acid used, as opposite to root number and root and shoot dry matter. Root length was the variable most affected by the treatments. The third article had as objective to evaluate the response of 25 rice genotypes to the phytotoxic effect of acetic, propionic and butyric acids, individually. In this work, 4 treatments were used for each acid: 0 (control); 4; 8 and 12 mM for acetic; 0; 3; 6 and 9 mM for propionic and 0; 2; 4 and 6 mM for butyric acid, respectively. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter. The relative performance of the variable CR was the most affected by the acids and the regressions established for this variable revealed ix ix tolerant and sensitive genotypes to organic acids, with 6; 6 and 9 tolerant genotypes for acetic, propionic and butyric acids, respectively. It was observed a higher number of tolerant genotypes on the japonica than on the indica group. The fourth experiment had as objective to evaluate the response of 20 rice cultivars to the interactive phytotoxic effect of acetic, propionic and butyric acids. In these work, four treatments, 0 (control); 3; 6 and 9 mM were used, consisting of the mixture of three acids (acetic, propionic and butyric) at a 6:3:1 ratio. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter, phosphorus (P) and potassium (K) content. The results indicated significant differences between the genotypes evaluated for the characters CR, CPA, P and K. Four genotypes were ranked as tolerants. The variable CR associated to CPA, P and K are indicated for the selection of tolerant genotypes. The results obtained allowed one to establish an adequate methodology for the selection of rice genotypes under hydroponic systems combined with organic acid stress (acetic, propionic and butyric) as well as to select promising genotypes regarding their response to this stress.Os solos do tipo hidromórfico apresentam como característica principal uma reduzida capacidade de drenagem natural, sendo utilizados principalmente para cultivo de arroz irrigado. Assim, a ocorrência de condições anaeróbias associada com a presença de matéria orgânica favorece o desenvolvimento de microrganismos anaeróbios que causam a fermentação desta matéria orgânica produzindo substâncias fitotóxicas representadas principalmente pelos ácidos orgânicos alifáticos de cadeia curta. A seleção de constituições genéticas de arroz promissoras e adaptadas para utilização nestas situações requer avaliações de difícil execução a campo, sendo simplificada com a utilização de sistemas hidropônicos. A pesquisa foi composta de quatro trabalhos que tiveram como objetivo principal estabelecer uma metodologia adequada para estudos com ácidos orgânicos em arroz mediante cultivo hidropônico. O primeiro trabalho determinou a faixa de concentrações e variáveis resposta mais indicadas para avaliações de genótipos de arroz em hidroponia. Foram estudados os efeitos de seis concentrações dos três principais ácidos formados no solo: ácido acético (0; 4; 8; 12; 16 e 20 mM), ácido propiônico (0; 3; 6; 9; 12; e 15 mM) e ácido butírico (0; 2; 4; 6; 8 e 10 mM) em dois genótipos de elevada divergência (BRS 7-TAIM e SAIBAN). Os resultados indicam que as faixas de concentração mais adequadas para estudos de tolerância de arroz a ácidos orgânicos estão entre 15,8 e 8,4; 9,1 e 4,2 e 7,7 e 3,7 mM para os ácidos acético, propiônico e butírico respectivamente, e a variável mais responsiva foi comprimento de raízes. O segundo experimento teve como objetivo determinar, em hidroponia, a influência do nível de pH utilizado na solução hidropônica na fitotoxidade causada pelos ácidos acético, propiônico e butírico em arroz, bem como o desempenho de algumas variáveis atualmente utilizadas em estudos de tolerância a estresses abióticos em sistemas hidropônicos. Neste experimento, foram avaliados três ácidos (acético, propiônico e butírico) e quatro níveis de pH (4,0; 5,0; 6,0 e 7,0). Os resultados permitem concluir que níveis reduzidos de pH aumentam a fitotoxidez de todos os ácidos. Os comprimentos de raízes e parte aérea têm comportamento independente do ácido utilizado, ao contrário do número de raízes e matérias secas de raízes e parte aérea. O comprimento de raízes foi a variável mais afetada pelo efeito das doses. O terceiro trabalho teve como objetivo avaliar a resposta de 25 genótipos de arroz à ação fitotóxica dos ácidos acético, propiônico e butírico individualmente. Neste trabalho foram utilizadas quatro doses para cada ácido: 0 vii vii (testemunha); 4; 8 e 12 mM para ácido acético; 0; 3; 6 e 9 mM para ácido propiônico e 0; 2; 4 e 6 mM para ácido butírico As variáveis mensuradas foram comprimento de raízes (CR) e parte aérea (CPA), número de raízes (NR) e matéria seca de raízes (MSR) e parte aérea (MSPA). O desempenho relativo da variável CR foi o mais afetado pelos ácidos e as regressões estabelecidas para essa variável revelaram genótipos tolerantes e sensíveis aos ácidos orgânicos, com seis; seis e nove genótipos tolerântes para os ácidos acético, propiônico e butírico, respectivamente. Foi constatado ainda maior número de tolerantes no grupo japonica do que no indica. O quarto experimento teve como objetivo avaliar a resposta de 20 genótipos de arroz a ação fitotóxica interativa dos ácidos acético, propiônico e butírico. Neste trabalho foram utilizados quatro doses, 0 (testemunha); 3; 6 e 9 mM, que foram constituídos da mistura dos três ácidos (acético, propiônico e butírico) na relação 6:3:1. As variáveis mensuradas foram comprimento de raízes (CR) e parte aérea (CPA), número de raízes (NR) e matéria seca de raízes (MSR) e parte aérea (MSPA), teor de fósforo (P) e de potássio (K). Os resultados demonstraram diferenças significativas entre os genótipos avaliados nos caracteres CR, CPA, P e K. Quatro genótipos foram classificados como tolerantes. A variável CR associada a CPA, P e K são indicadas para seleção de genótipos tolerantes. Os resultados obtidos pelos trabalhos permitiram estabelecer uma metodologia adequada para utilização em seleção de genótipos de arroz mediante sistemas de hidroponia sob estresse por ácidos orgânicos (acético, propiônico e butírico) bem como selecionar genótipos promissores quanto a resposta à este estresse.application/pdfporUniversidade Federal de PelotasPrograma de Pós-Graduação em AgronomiaUFPelBRFaculdade de Agronomia Eliseu MacielEstresse abióticoOryza sativaFitotoxidezMetodologiaVariabilidade genéticaRecursos genéticosAbiotic stressMmethodologyGenetic variabilityCNPQ::CIENCIAS AGRARIAS::AGRONOMIAResposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controladoOrganic acid related stress responses in rice (Oryza sativa L.) genotypes under ambient controlled conditionsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELORIGINALTese _Mauricio_ Marini_ Kopp.pdfapplication/pdf840580http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2074/1/Tese%20_Mauricio_%20Marini_%20Kopp.pdfaa13499ffc402e82213fc46d39ba5dd0MD51open accessTEXTTese _Mauricio_ Marini_ Kopp.pdf.txtTese _Mauricio_ Marini_ Kopp.pdf.txtExtracted Texttext/plain204296http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2074/2/Tese%20_Mauricio_%20Marini_%20Kopp.pdf.txta62026159b7f03499c9e20891183dbc1MD52open accessTHUMBNAILTese _Mauricio_ Marini_ Kopp.pdf.jpgTese _Mauricio_ Marini_ Kopp.pdf.jpgGenerated Thumbnailimage/jpeg1345http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2074/3/Tese%20_Mauricio_%20Marini_%20Kopp.pdf.jpgafb47d09228b604c1721ab9bd6e6013eMD53open access123456789/20742023-05-31 11:19:44.337open accessoai:guaiaca.ufpel.edu.br:123456789/2074Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2023-05-31T14:19:44Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false |
dc.title.por.fl_str_mv |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
dc.title.alternative.eng.fl_str_mv |
Organic acid related stress responses in rice (Oryza sativa L.) genotypes under ambient controlled conditions |
title |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
spellingShingle |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado Kopp, Mauricio Marini Estresse abiótico Oryza sativa Fitotoxidez Metodologia Variabilidade genética Recursos genéticos Abiotic stress Mmethodology Genetic variability CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
title_full |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
title_fullStr |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
title_full_unstemmed |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
title_sort |
Resposta de genótipos de arroz (Oryza sativa L.) ao estresse por ácidos orgânicos sob condições de ambiente controlado |
author |
Kopp, Mauricio Marini |
author_facet |
Kopp, Mauricio Marini |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/7612079051748634 |
dc.contributor.advisorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780819H4 |
dc.contributor.advisor-co1.fl_str_mv |
Sousa, Rogerio Oliveira de |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/0190845387852451 |
dc.contributor.advisor1.fl_str_mv |
Oliveira, Antonio Costa de |
dc.contributor.author.fl_str_mv |
Kopp, Mauricio Marini |
contributor_str_mv |
Sousa, Rogerio Oliveira de Oliveira, Antonio Costa de |
dc.subject.por.fl_str_mv |
Estresse abiótico Oryza sativa Fitotoxidez Metodologia Variabilidade genética Recursos genéticos |
topic |
Estresse abiótico Oryza sativa Fitotoxidez Metodologia Variabilidade genética Recursos genéticos Abiotic stress Mmethodology Genetic variability CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Abiotic stress Mmethodology Genetic variability |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
Hydromorphic soils present as main feature a reduced natural drainage ability, being mostly used for growing irrigated rice. Thus, the occurrence of anaerobic conditions associated to the presence of organic matter enables the development of anaerobic microorganisms which, while decomposing the organic matter, generate phytotoxic substances represented mainly by short chain aliphatic organic acids. The selection of promising genotypes adapted for use in these situations requires complicated field evaluations, which can be simulated under hydroponic culture. The research was composed of four articles that had as major goals to establish an adequate methodology for growing rice under organic acid rich hydroponic culture. The first work aimed at determining the range of concentrations and response variables most indicated for evaluating rice genotypes under hydroponics. The effects of six different concentrations for the three major acids formed in the soil: acetic (0; 4; 8; 12; 16 and 20 mM), propionic (0; 3; 6; 9; 12 and 15 mM) and butyric (0; 2; 4; 6; 8 and 10 mM) acids in two genotypes of high divergence (BRS 7-TAIM and SAIBAN). The results indicated that the most adequate concentration range for organic acid studies in rice are between 15.8 and 8.4; 9.1 and 4.2 and 7.7 and 3.7 mM for acetic, propionic and butyric acids, respectively. Also, the most responsive variable was root length. The second experiment had as goal to determine, under hydroponics, the influence of the pH level used in the hydroponic solution on the phytotoxicity caused by acetic, propionic and butyric acids in rice, as well as the performance of some variables currently used in studies of abiotic stress tolerance in hydroponic systems. For this experiment, three acids (acetic, propionic and butyric) and four pH (4.0; 5.0; 6.0 and 7.0) levels were evaluated. The results allow one to conclude that reduced pH levels increase the phytotoxicity of all acids. The root and shoot lengths have independent behavior from the acid used, as opposite to root number and root and shoot dry matter. Root length was the variable most affected by the treatments. The third article had as objective to evaluate the response of 25 rice genotypes to the phytotoxic effect of acetic, propionic and butyric acids, individually. In this work, 4 treatments were used for each acid: 0 (control); 4; 8 and 12 mM for acetic; 0; 3; 6 and 9 mM for propionic and 0; 2; 4 and 6 mM for butyric acid, respectively. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter. The relative performance of the variable CR was the most affected by the acids and the regressions established for this variable revealed ix ix tolerant and sensitive genotypes to organic acids, with 6; 6 and 9 tolerant genotypes for acetic, propionic and butyric acids, respectively. It was observed a higher number of tolerant genotypes on the japonica than on the indica group. The fourth experiment had as objective to evaluate the response of 20 rice cultivars to the interactive phytotoxic effect of acetic, propionic and butyric acids. In these work, four treatments, 0 (control); 3; 6 and 9 mM were used, consisting of the mixture of three acids (acetic, propionic and butyric) at a 6:3:1 ratio. The variables measured were root (CR) and shoot (CPA) length, root number (NR) and root (MSR) and shoot (MSPA) dry matter, phosphorus (P) and potassium (K) content. The results indicated significant differences between the genotypes evaluated for the characters CR, CPA, P and K. Four genotypes were ranked as tolerants. The variable CR associated to CPA, P and K are indicated for the selection of tolerant genotypes. The results obtained allowed one to establish an adequate methodology for the selection of rice genotypes under hydroponic systems combined with organic acid stress (acetic, propionic and butyric) as well as to select promising genotypes regarding their response to this stress. |
publishDate |
2008 |
dc.date.available.fl_str_mv |
2008-08-20 2014-08-20T14:06:13Z |
dc.date.issued.fl_str_mv |
2008-04-07 |
dc.date.accessioned.fl_str_mv |
2014-08-20T14:06:13Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
KOPP, Mauricio Marini. Organic acid related stress responses in rice (Oryza sativa L.) genotypes under ambient controlled conditions. 2008. 120 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008. |
dc.identifier.uri.fl_str_mv |
http://guaiaca.ufpel.edu.br/handle/123456789/2074 |
identifier_str_mv |
KOPP, Mauricio Marini. Organic acid related stress responses in rice (Oryza sativa L.) genotypes under ambient controlled conditions. 2008. 120 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008. |
url |
http://guaiaca.ufpel.edu.br/handle/123456789/2074 |
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por |
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por |
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openAccess |
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Universidade Federal de Pelotas |
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Programa de Pós-Graduação em Agronomia |
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UFPel |
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BR |
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Faculdade de Agronomia Eliseu Maciel |
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Universidade Federal de Pelotas |
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