Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino
Ano de defesa: | 2007 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal do Rio Grande do Norte
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Genética e Biologia Molecular
|
Departamento: |
Genética e Biologia Molecular
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | https://repositorio.ufrn.br/jspui/handle/123456789/16775 |
Resumo: | The germination of cotton seeds and the seedlings emergency are generally delayed and reduced by the salinity. Although the cotton is considered a tolerant culture, it can suffer substantial reductions in regarding its growth and production when exposed to salinity condition. The aims of this study went evaluate the effect of the saline stress in the germination phase to four cotton genotypes (BRS Rubi, BRS Safira, BRS 201 and CNPA 187 8H), using different osmotic potentials generated with increment of sodium chloride (NaCl). The saline stress was simulated using NaCl aqueous solutions in the potentials: 0.0 (Control); -0.2; -0.4; -0.6; -0.8 and -1.0 MPa. The treatments were monitored by means of tests for analysis of seeds, germination, first counting, speed germination index, length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio. The tests for germination, first counting and index of germination speed were accomplished using 50 seeds for repetition and for the study of length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio were used 20 seeds by repetition. For both tests four repetitions were accomplished by genotype for each one of the potentials. The seeds of each repetition were involved in papers Germitest humidified with NaCl solution corresponding to the potential. The repetitions of both tests were maintained in a germinator with saturated humidity. The analysis were initiate four days after the induction of the saline stress. The evaluations of the first three variables analyzed were accomplished daily; the seeds were remove and counted when its germinated. For the length tests just the repetitions corresponding to the potential of NaCl 0,0 MPa were analysis 4 days after the beginning of the induction of the saline stress. The analysis of the repetitions of the potentials -0,2 and -0,4 and of the potentials -0,6, -0,8 and -1,0 MPa they were accomplished with 12 and 20 days, respectively. For accomplishment of the analisis of this test the shoot of the 20 plantules of each repetition was separate from the radicle and both parts were measured. The statistical analyses were performed using the GENMOD and GLM procedures of the SAS. For the variable germination, the cultivates CNPA 187 8H and BRS Safira stood out for the potential -0.8 MPa, with averages of 89% and 81%, respectively. The test of speed germination index to cultivate BRS Safira presented the largest averages for the two higher saline potentials. It was observed that the increase of the saline potential reduces the germination percentage and speed germination index. For each day of evaluation it was verified that the increase of the saline potential causes a reduction of the length both of the shoot and of the radicle. The radicle tends to grow more than the shoot until the potential -0,4 MPa |
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Lima, Leonardo Henrique Guedes de Moraishttp://lattes.cnpq.br/9250206525235408http://lattes.cnpq.br/3036544314910366Lima, Marleide Magalhães de Andradehttp://lattes.cnpq.br/1171370761724298Fernandes, Pedro Dantashttp://lattes.cnpq.br/4411670211010251Scortecci, Kátia Castanhohttp://lattes.cnpq.br/4808910380593455Vidal, Márcia Soares2014-12-17T15:18:12Z2007-07-182014-12-17T15:18:12Z2007-02-28LIMA, Leonardo Henrique Guedes de Morais. Physiological quality of seeds of cotton genotypes under saline stress. 2007. 54 f. Dissertação (Mestrado em Genética e Biologia Molecular) - Universidade Federal do Rio Grande do Norte, Natal, 2007.https://repositorio.ufrn.br/jspui/handle/123456789/16775The germination of cotton seeds and the seedlings emergency are generally delayed and reduced by the salinity. Although the cotton is considered a tolerant culture, it can suffer substantial reductions in regarding its growth and production when exposed to salinity condition. The aims of this study went evaluate the effect of the saline stress in the germination phase to four cotton genotypes (BRS Rubi, BRS Safira, BRS 201 and CNPA 187 8H), using different osmotic potentials generated with increment of sodium chloride (NaCl). The saline stress was simulated using NaCl aqueous solutions in the potentials: 0.0 (Control); -0.2; -0.4; -0.6; -0.8 and -1.0 MPa. The treatments were monitored by means of tests for analysis of seeds, germination, first counting, speed germination index, length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio. The tests for germination, first counting and index of germination speed were accomplished using 50 seeds for repetition and for the study of length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio were used 20 seeds by repetition. For both tests four repetitions were accomplished by genotype for each one of the potentials. The seeds of each repetition were involved in papers Germitest humidified with NaCl solution corresponding to the potential. The repetitions of both tests were maintained in a germinator with saturated humidity. The analysis were initiate four days after the induction of the saline stress. The evaluations of the first three variables analyzed were accomplished daily; the seeds were remove and counted when its germinated. For the length tests just the repetitions corresponding to the potential of NaCl 0,0 MPa were analysis 4 days after the beginning of the induction of the saline stress. The analysis of the repetitions of the potentials -0,2 and -0,4 and of the potentials -0,6, -0,8 and -1,0 MPa they were accomplished with 12 and 20 days, respectively. For accomplishment of the analisis of this test the shoot of the 20 plantules of each repetition was separate from the radicle and both parts were measured. The statistical analyses were performed using the GENMOD and GLM procedures of the SAS. For the variable germination, the cultivates CNPA 187 8H and BRS Safira stood out for the potential -0.8 MPa, with averages of 89% and 81%, respectively. The test of speed germination index to cultivate BRS Safira presented the largest averages for the two higher saline potentials. It was observed that the increase of the saline potential reduces the germination percentage and speed germination index. For each day of evaluation it was verified that the increase of the saline potential causes a reduction of the length both of the shoot and of the radicle. The radicle tends to grow more than the shoot until the potential -0,4 MPaA germinação de sementes de algodão e a emergência de plântulas são geralmente retardadas e reduzidas pela salinidade. Embora o algodão seja considerado uma cultura tolerante, pode sofrer reduções substanciais no seu crescimento e na produção quando exposta à condição de salinidade. O objetivo deste estudo foi avaliar o efeito do estresse salino na fase de germinação em quatro genótipos de algodão (BRS Rubi, BRS Safira, BRS 201 e CNPA 187 8H), empregando-se diferentes potenciais osmóticos, gerados com acréscimo de cloreto de sódio (NaCl). O estresse salino foi simulado, utilizando-se soluções aquosas de NaCl nos potenciais 0,0; -0,2; -0,4; -0,6; -0,8 e -1,0 MPa. Os tratamentos foram monitorados por meio de testes para análise de sementes: germinação, primeira contagem, índice de velocidade de germinação (IVG), comprimento de parte aérea, comprimento de radícula, peso seco de eixo embrionário e relação radícula/parte aérea. Os testes para germinação, primeira contagem e IVG foram realizados utilizando-se 50 sementes por repetição; para o estudo de comprimento de parte aérea, comprimento de radícula, peso seco de eixo embrionário e relação radícula/parte aérea, foram utilizadas 20 sementes por repetição. Para ambos os testes, foram realizadas quatro repetições por genótipo para cada um dos potenciais. As sementes de cada repetição foram envolvidas em papéis Germitest umedecidos com a solução de NaCl correspondente ao potencial. As repetições de ambos os testes foram conduzidas em germinador e a umidade mantida ao ponto de saturação. As leituras das três primeiras variáveis analisadas foram iniciadas quatro dias após a indução do estresse salino. As avaliações foram realizadas diariamente; as sementes foram retiradas e contabilizadas à medida que ocorria a germinação. Para os testes de comprimento, apenas as repetições correspondentes ao potencial de NaCl 0,0 MPa foram lidas, quatro dias após o início da indução do estresse. As leituras das repetições dos potenciais -0,2 e -0,4 e dos potenciais -0,6, -0,8 e -1,0 MPa foram realizadas, respectivamente, aos 12º e 20º dias. Para a realização das leituras deste teste, a parte aérea das 20 plantas de cada repetição foi separada da radícula e ambas mensuradas. As análises estatísticas foram efetuadas, utilizando-se os procedimentos GENMOD e GLM do SAS. Para a variável germinação, as cultivares CNPA 187 8H e BRS Safira destacaram-se para o potencial -0,8 MPa, com médias de 89% e 81%, respectivamente. Foi observado que o aumento do potencial salino reduziu a porcentagem do IVG. Para cada dia de avaliação, verificou-se que o aumento do potencial salino provoca uma redução do comprimento da parte aérea e da radícula. A radícula tende a crescer mais que a parte aérea até o potencial -0,4 MPaapplication/pdfporUniversidade Federal do Rio Grande do NortePrograma de Pós-Graduação em Genética e Biologia MolecularUFRNBRGenética e Biologia MolecularAlgodãoGerminaçãoSalinidadeCottonGerminationSalinityCNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA MOLECULAR E DE MICROORGANISMOSQualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salinoPhysiological quality of seeds of cotton genotypes under saline stressinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALLeonardoHGML.pdfapplication/pdf763178https://repositorio.ufrn.br/bitstream/123456789/16775/1/LeonardoHGML.pdfc568f24d89429cee54a6bd18443ef3bcMD51TEXTLeonardoHGML.pdf.txtLeonardoHGML.pdf.txtExtracted texttext/plain108738https://repositorio.ufrn.br/bitstream/123456789/16775/6/LeonardoHGML.pdf.txt08663f79ab15dad593fa8b879b51aa74MD56THUMBNAILLeonardoHGML.pdf.jpgLeonardoHGML.pdf.jpgIM Thumbnailimage/jpeg3546https://repositorio.ufrn.br/bitstream/123456789/16775/7/LeonardoHGML.pdf.jpgb8dd8b7465be66c125b8227d0d60fb1aMD57123456789/167752017-11-04 06:04:24.502oai:https://repositorio.ufrn.br:123456789/16775Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2017-11-04T09:04:24Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.por.fl_str_mv |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
dc.title.alternative.eng.fl_str_mv |
Physiological quality of seeds of cotton genotypes under saline stress |
title |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
spellingShingle |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino Lima, Leonardo Henrique Guedes de Morais Algodão Germinação Salinidade Cotton Germination Salinity CNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA MOLECULAR E DE MICROORGANISMOS |
title_short |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
title_full |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
title_fullStr |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
title_full_unstemmed |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
title_sort |
Qualidade fisiológica de sementes de genótipos de algodoeiro sob estresse salino |
author |
Lima, Leonardo Henrique Guedes de Morais |
author_facet |
Lima, Leonardo Henrique Guedes de Morais |
author_role |
author |
dc.contributor.authorID.por.fl_str_mv |
|
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/9250206525235408 |
dc.contributor.advisorID.por.fl_str_mv |
|
dc.contributor.advisorLattes.por.fl_str_mv |
http://lattes.cnpq.br/3036544314910366 |
dc.contributor.advisor-co1ID.por.fl_str_mv |
|
dc.contributor.referees1.pt_BR.fl_str_mv |
Fernandes, Pedro Dantas |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://lattes.cnpq.br/4411670211010251 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Scortecci, Kátia Castanho |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://lattes.cnpq.br/4808910380593455 |
dc.contributor.author.fl_str_mv |
Lima, Leonardo Henrique Guedes de Morais |
dc.contributor.advisor-co1.fl_str_mv |
Lima, Marleide Magalhães de Andrade |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/1171370761724298 |
dc.contributor.advisor1.fl_str_mv |
Vidal, Márcia Soares |
contributor_str_mv |
Lima, Marleide Magalhães de Andrade Vidal, Márcia Soares |
dc.subject.por.fl_str_mv |
Algodão Germinação Salinidade |
topic |
Algodão Germinação Salinidade Cotton Germination Salinity CNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA MOLECULAR E DE MICROORGANISMOS |
dc.subject.eng.fl_str_mv |
Cotton Germination Salinity |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA MOLECULAR E DE MICROORGANISMOS |
description |
The germination of cotton seeds and the seedlings emergency are generally delayed and reduced by the salinity. Although the cotton is considered a tolerant culture, it can suffer substantial reductions in regarding its growth and production when exposed to salinity condition. The aims of this study went evaluate the effect of the saline stress in the germination phase to four cotton genotypes (BRS Rubi, BRS Safira, BRS 201 and CNPA 187 8H), using different osmotic potentials generated with increment of sodium chloride (NaCl). The saline stress was simulated using NaCl aqueous solutions in the potentials: 0.0 (Control); -0.2; -0.4; -0.6; -0.8 and -1.0 MPa. The treatments were monitored by means of tests for analysis of seeds, germination, first counting, speed germination index, length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio. The tests for germination, first counting and index of germination speed were accomplished using 50 seeds for repetition and for the study of length of shoot, radicle length, dry weigth of embrionic axis and shoot/radicle ratio were used 20 seeds by repetition. For both tests four repetitions were accomplished by genotype for each one of the potentials. The seeds of each repetition were involved in papers Germitest humidified with NaCl solution corresponding to the potential. The repetitions of both tests were maintained in a germinator with saturated humidity. The analysis were initiate four days after the induction of the saline stress. The evaluations of the first three variables analyzed were accomplished daily; the seeds were remove and counted when its germinated. For the length tests just the repetitions corresponding to the potential of NaCl 0,0 MPa were analysis 4 days after the beginning of the induction of the saline stress. The analysis of the repetitions of the potentials -0,2 and -0,4 and of the potentials -0,6, -0,8 and -1,0 MPa they were accomplished with 12 and 20 days, respectively. For accomplishment of the analisis of this test the shoot of the 20 plantules of each repetition was separate from the radicle and both parts were measured. The statistical analyses were performed using the GENMOD and GLM procedures of the SAS. For the variable germination, the cultivates CNPA 187 8H and BRS Safira stood out for the potential -0.8 MPa, with averages of 89% and 81%, respectively. The test of speed germination index to cultivate BRS Safira presented the largest averages for the two higher saline potentials. It was observed that the increase of the saline potential reduces the germination percentage and speed germination index. For each day of evaluation it was verified that the increase of the saline potential causes a reduction of the length both of the shoot and of the radicle. The radicle tends to grow more than the shoot until the potential -0,4 MPa |
publishDate |
2007 |
dc.date.available.fl_str_mv |
2007-07-18 2014-12-17T15:18:12Z |
dc.date.issued.fl_str_mv |
2007-02-28 |
dc.date.accessioned.fl_str_mv |
2014-12-17T15:18:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
LIMA, Leonardo Henrique Guedes de Morais. Physiological quality of seeds of cotton genotypes under saline stress. 2007. 54 f. Dissertação (Mestrado em Genética e Biologia Molecular) - Universidade Federal do Rio Grande do Norte, Natal, 2007. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/16775 |
identifier_str_mv |
LIMA, Leonardo Henrique Guedes de Morais. Physiological quality of seeds of cotton genotypes under saline stress. 2007. 54 f. Dissertação (Mestrado em Genética e Biologia Molecular) - Universidade Federal do Rio Grande do Norte, Natal, 2007. |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/16775 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal do Rio Grande do Norte |
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Programa de Pós-Graduação em Genética e Biologia Molecular |
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UFRN |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Genética e Biologia Molecular |
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Universidade Federal do Rio Grande do Norte |
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