Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos

Detalhes bibliográficos
Autor(a) principal: Sena, Eliza Maiara Nogueira de
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UEFS
Texto Completo: http://localhost:8080/tede/handle/tede/567
Resumo: The stress situation in Caatinga is aggravated by climate changes, from which are predicted higher temperatures; water scarcity and higher soil salinization. Studies evaluating differences in seeds tolerance to abiotic stress among samples or genotypes of the same species can constitute physiologic tools and significant and complementary information for the selection of the most adapted group to environmental pressures. This work aimed to compare the seed vulnerability of different samples of Erythrina velutina (Fabaceae) to abiotic stress; evaluate que physiologic quality of seeds and determine the tolerance limits to saline, hydric and thermic stress. The assays were conducted at EMBRAPA semiarido Seeds laboratory and at the Germination laboratory of State University of Feira de Santana. In addition, the assays were entirely randomly mounted, four repetitions of 10 seeds for the vigor test and 50 seeds for the stress test. In the initial vigor, the seeds of all samples showed 100% of radicle emission at the first count. The seeds samples were affected by the addition of sodium chloride in the solution, exhibiting critical limit at 36dSm-1 for some samples. The radicular protrusion was affected with the decrease of the osmotic potential of the solution, which was caused by PEG 6000, limiting the germination in -0,9 MPa. The seed germination of E. velutina occurs at broad limits of temperature, from 5 to 40°C. Generally, the stress imposed by sodium chloride and PEG did not compromise the viability of the seed germinal power as the seeds of the samples showed high rate of germination when the ideal conditions were reestablished, excepting Caiçara 2011. The great temperature of E. velutina germination occurs between 25 to 30°C.
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spelling Cruz, Claudinéia Regina Pelacani64037118904http://lattes.cnpq.br/246560126033439203388223564http://lattes.cnpq.br/0487586575509865Sena, Eliza Maiara Nogueira de2018-01-26T21:53:28Z2017-07-14SENA, Eliza Maiara Nogueira de. Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos. 2017. 72 f. Dissertação (Mestrado Acadêmico em Recursos Genéticos Vegetais) - Universidade Estadual de Feira de Santana, Feira de Santana, 2017.http://localhost:8080/tede/handle/tede/567The stress situation in Caatinga is aggravated by climate changes, from which are predicted higher temperatures; water scarcity and higher soil salinization. Studies evaluating differences in seeds tolerance to abiotic stress among samples or genotypes of the same species can constitute physiologic tools and significant and complementary information for the selection of the most adapted group to environmental pressures. This work aimed to compare the seed vulnerability of different samples of Erythrina velutina (Fabaceae) to abiotic stress; evaluate que physiologic quality of seeds and determine the tolerance limits to saline, hydric and thermic stress. The assays were conducted at EMBRAPA semiarido Seeds laboratory and at the Germination laboratory of State University of Feira de Santana. In addition, the assays were entirely randomly mounted, four repetitions of 10 seeds for the vigor test and 50 seeds for the stress test. In the initial vigor, the seeds of all samples showed 100% of radicle emission at the first count. The seeds samples were affected by the addition of sodium chloride in the solution, exhibiting critical limit at 36dSm-1 for some samples. The radicular protrusion was affected with the decrease of the osmotic potential of the solution, which was caused by PEG 6000, limiting the germination in -0,9 MPa. The seed germination of E. velutina occurs at broad limits of temperature, from 5 to 40°C. Generally, the stress imposed by sodium chloride and PEG did not compromise the viability of the seed germinal power as the seeds of the samples showed high rate of germination when the ideal conditions were reestablished, excepting Caiçara 2011. The great temperature of E. velutina germination occurs between 25 to 30°C.A situação de estresse na caatinga tende a se agravar pelas mudanças no clima onde se prevê maiores temperaturas, escassez de água e maior salinização do solo. Estudos que avaliem as diferenças de tolerância de sementes aos estresses abióticos entre acessos ou genótipos da mesma espécie podem constituir ferramentas fisiológicas importantes e complementares para a seleção de grupos de plantas mais adaptadas às pressões ambientais. Esse trabalho teve como objetivos comparar a vulnerabilidade de sementes de diferentes acessos de Erythrina velutina (Fabaceae) à estresses abióticos; avaliar a qualidade fisiológica das sementes; e determinar os limites de tolerância aos estresses salino, hídrico e térmico. Os ensaios foram conduzidos nos laboratórios de sementes da Embrapa Semiárido (Petrolina-PE) e no de Germinação da UEFS (Feira de Santana –BA). Os ensaios foram montados em delineamento inteiramente casualizado, quatro repetições de 10 sementes para o teste de vigor e de 50 sementes para os estresses. Em relação ao vigor inicial as sementes de todos os acessos apresentaram 100% de emissão de radícula na primeira contagem. As sementes dos acessos foram afetadas pela adição de cloreto de sódio na solução apresentando limite crítico de germinação aos 36 dS.m-1 para alguns. A protrusão radicular foi afetada também com a diminuição do potencial osmótico da solução causada pelo PEG 6000 tendo limite de germinação em -0,9 MPa. A germinação de sementes de E. velutina ocorreu sob amplo limites de temperatura, 5 a 40 °C. De modo geral os estresses impostos pelo cloreto de sódio e PEG não comprometeram a viabilidade do poder germinativo, visto que as sementes dos acessos apresentaram alta porcentagem de germinação quando as condições ideais foram reestabelecidas, exceto as de Caiçara 2011. A temperatura ótima de germinação de E. velutina ocorreu na faixa de 25 a 30 °C.Submitted by Jadson Francisco de Jesus SILVA (jadson@uefs.br) on 2018-01-26T21:53:28Z No. of bitstreams: 1 dissertação Eliza 14 de dezembro final.pdf: 1828093 bytes, checksum: 7d102752271132d8745e82e9533c13b3 (MD5)Made available in DSpace on 2018-01-26T21:53:28Z (GMT). No. of bitstreams: 1 dissertação Eliza 14 de dezembro final.pdf: 1828093 bytes, checksum: 7d102752271132d8745e82e9533c13b3 (MD5) Previous issue date: 2017-07-14Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Estadual de Feira de SantanaMestrado Acadêmico em Recursos Genéticos VegetaisUEFSBrasilDEPARTAMENTO DE CIÊNCIAS BIOLÓGICASGerminaçãoSalinidadePEGTolerância térmicaMulunguGerminationSalinityThermic toleranceAGRONOMIA::CIENCIA DO SOLOVulnerabilidade de acessos de sementes de Erythrina velutina Willd. 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dc.title.por.fl_str_mv Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
title Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
spellingShingle Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
Sena, Eliza Maiara Nogueira de
Germinação
Salinidade
PEG
Tolerância térmica
Mulungu
Germination
Salinity
Thermic tolerance
AGRONOMIA::CIENCIA DO SOLO
title_short Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
title_full Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
title_fullStr Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
title_full_unstemmed Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
title_sort Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos
author Sena, Eliza Maiara Nogueira de
author_facet Sena, Eliza Maiara Nogueira de
author_role author
dc.contributor.advisor1.fl_str_mv Cruz, Claudinéia Regina Pelacani
dc.contributor.advisor1ID.fl_str_mv 64037118904
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/2465601260334392
dc.contributor.authorID.fl_str_mv 03388223564
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/0487586575509865
dc.contributor.author.fl_str_mv Sena, Eliza Maiara Nogueira de
contributor_str_mv Cruz, Claudinéia Regina Pelacani
dc.subject.por.fl_str_mv Germinação
Salinidade
PEG
Tolerância térmica
Mulungu
topic Germinação
Salinidade
PEG
Tolerância térmica
Mulungu
Germination
Salinity
Thermic tolerance
AGRONOMIA::CIENCIA DO SOLO
dc.subject.eng.fl_str_mv Germination
Salinity
Thermic tolerance
dc.subject.cnpq.fl_str_mv AGRONOMIA::CIENCIA DO SOLO
description The stress situation in Caatinga is aggravated by climate changes, from which are predicted higher temperatures; water scarcity and higher soil salinization. Studies evaluating differences in seeds tolerance to abiotic stress among samples or genotypes of the same species can constitute physiologic tools and significant and complementary information for the selection of the most adapted group to environmental pressures. This work aimed to compare the seed vulnerability of different samples of Erythrina velutina (Fabaceae) to abiotic stress; evaluate que physiologic quality of seeds and determine the tolerance limits to saline, hydric and thermic stress. The assays were conducted at EMBRAPA semiarido Seeds laboratory and at the Germination laboratory of State University of Feira de Santana. In addition, the assays were entirely randomly mounted, four repetitions of 10 seeds for the vigor test and 50 seeds for the stress test. In the initial vigor, the seeds of all samples showed 100% of radicle emission at the first count. The seeds samples were affected by the addition of sodium chloride in the solution, exhibiting critical limit at 36dSm-1 for some samples. The radicular protrusion was affected with the decrease of the osmotic potential of the solution, which was caused by PEG 6000, limiting the germination in -0,9 MPa. The seed germination of E. velutina occurs at broad limits of temperature, from 5 to 40°C. Generally, the stress imposed by sodium chloride and PEG did not compromise the viability of the seed germinal power as the seeds of the samples showed high rate of germination when the ideal conditions were reestablished, excepting Caiçara 2011. The great temperature of E. velutina germination occurs between 25 to 30°C.
publishDate 2017
dc.date.issued.fl_str_mv 2017-07-14
dc.date.accessioned.fl_str_mv 2018-01-26T21:53:28Z
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dc.identifier.citation.fl_str_mv SENA, Eliza Maiara Nogueira de. Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos. 2017. 72 f. Dissertação (Mestrado Acadêmico em Recursos Genéticos Vegetais) - Universidade Estadual de Feira de Santana, Feira de Santana, 2017.
dc.identifier.uri.fl_str_mv http://localhost:8080/tede/handle/tede/567
identifier_str_mv SENA, Eliza Maiara Nogueira de. Vulnerabilidade de acessos de sementes de Erythrina velutina Willd. (Fabaceae) a estresses abióticos. 2017. 72 f. Dissertação (Mestrado Acadêmico em Recursos Genéticos Vegetais) - Universidade Estadual de Feira de Santana, Feira de Santana, 2017.
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dc.publisher.program.fl_str_mv Mestrado Acadêmico em Recursos Genéticos Vegetais
dc.publisher.initials.fl_str_mv UEFS
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv DEPARTAMENTO DE CIÊNCIAS BIOLÓGICAS
publisher.none.fl_str_mv Universidade Estadual de Feira de Santana
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