Overcoming dormancy and determining optimal temperature for slender serradella seed germination
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/147249 |
Resumo: | The objective of this study was to identify the most efficient method for overcoming coat-imposed dormancy and determine the optimal germination temperature for Ornithopus pinnatus seeds. Treatments to overcome dormancy were: intact seeds; immersion in hot water at 60 ºC, followed by soaking in the same water (unheated)/24 h; immersion in hot water at 90 ºC, followed by soaking in the same water (unheated)/24 h; mechanical scarification; chemical scarification, H2SO4/5 min; and chemical scarification, H2SO4/10 min. Percentages were calculated for germinated, abnormal, dormant, and dead seeds. Optimal germination temperatures were calculated using eight constant temperatures (0, 5, 10, 15, 20, 25, 30, and 35 °C), with 8 h of light and 16 h of darkness. Germination rate, frequency, and synchronization index of germination were used as parameters to establish optimum temperature for germination. A completely randomized experimental design was used, with twelve repetitions of 100 seeds per treatment. Data obtained were subjected to analysis of variance and Tukey’s test at a 5% significance level. O. pinnatus seeds exhibit dormancy caused by the seed coat’s impermeability to water. Mechanical scarification was efficient in promoting seed germination. The species is stenothermal, meaning it cannot tolerate significant temperature variations. The germination rate of seeds was linearly dependent on temperature. Synchronization of the germination process is greater in the optimum temperature range, established between 15 and 20 °C. |
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Lopes, Rodrigo RamosSouza, Cleber Henrique Lopes deBertoncelli, PatriciaFranke, Lucia Brandao2016-08-17T02:16:29Z20151516-3598http://hdl.handle.net/10183/147249000992956The objective of this study was to identify the most efficient method for overcoming coat-imposed dormancy and determine the optimal germination temperature for Ornithopus pinnatus seeds. Treatments to overcome dormancy were: intact seeds; immersion in hot water at 60 ºC, followed by soaking in the same water (unheated)/24 h; immersion in hot water at 90 ºC, followed by soaking in the same water (unheated)/24 h; mechanical scarification; chemical scarification, H2SO4/5 min; and chemical scarification, H2SO4/10 min. Percentages were calculated for germinated, abnormal, dormant, and dead seeds. Optimal germination temperatures were calculated using eight constant temperatures (0, 5, 10, 15, 20, 25, 30, and 35 °C), with 8 h of light and 16 h of darkness. Germination rate, frequency, and synchronization index of germination were used as parameters to establish optimum temperature for germination. A completely randomized experimental design was used, with twelve repetitions of 100 seeds per treatment. Data obtained were subjected to analysis of variance and Tukey’s test at a 5% significance level. O. pinnatus seeds exhibit dormancy caused by the seed coat’s impermeability to water. Mechanical scarification was efficient in promoting seed germination. The species is stenothermal, meaning it cannot tolerate significant temperature variations. The germination rate of seeds was linearly dependent on temperature. Synchronization of the germination process is greater in the optimum temperature range, established between 15 and 20 °C.application/pdfengRevista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 44, n.12 (dez. 2015) p.413-419Melhoramento genetico animalReprodução animalFertilidadeTouroGermination rateOrnithopus pinnatusScarificationSynchronization index of germinationOvercoming dormancy and determining optimal temperature for slender serradella seed germinationinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000992956.pdf000992956.pdfTexto completo (inglês)application/pdf558225http://www.lume.ufrgs.br/bitstream/10183/147249/1/000992956.pdfd027ec1e7402628ebb5f72dbc9ebe4ebMD51TEXT000992956.pdf.txt000992956.pdf.txtExtracted Texttext/plain30762http://www.lume.ufrgs.br/bitstream/10183/147249/2/000992956.pdf.txtaad0a61a719d3b8208b1e837ff634108MD52THUMBNAIL000992956.pdf.jpg000992956.pdf.jpgGenerated Thumbnailimage/jpeg2217http://www.lume.ufrgs.br/bitstream/10183/147249/3/000992956.pdf.jpgf9cd38a88cba44ac6f959a01fa610adcMD5310183/1472492018-10-29 08:35:01.317oai:www.lume.ufrgs.br:10183/147249Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-29T11:35:01Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
title |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
spellingShingle |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination Lopes, Rodrigo Ramos Melhoramento genetico animal Reprodução animal Fertilidade Touro Germination rate Ornithopus pinnatus Scarification Synchronization index of germination |
title_short |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
title_full |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
title_fullStr |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
title_full_unstemmed |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
title_sort |
Overcoming dormancy and determining optimal temperature for slender serradella seed germination |
author |
Lopes, Rodrigo Ramos |
author_facet |
Lopes, Rodrigo Ramos Souza, Cleber Henrique Lopes de Bertoncelli, Patricia Franke, Lucia Brandao |
author_role |
author |
author2 |
Souza, Cleber Henrique Lopes de Bertoncelli, Patricia Franke, Lucia Brandao |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Lopes, Rodrigo Ramos Souza, Cleber Henrique Lopes de Bertoncelli, Patricia Franke, Lucia Brandao |
dc.subject.por.fl_str_mv |
Melhoramento genetico animal Reprodução animal Fertilidade Touro |
topic |
Melhoramento genetico animal Reprodução animal Fertilidade Touro Germination rate Ornithopus pinnatus Scarification Synchronization index of germination |
dc.subject.eng.fl_str_mv |
Germination rate Ornithopus pinnatus Scarification Synchronization index of germination |
description |
The objective of this study was to identify the most efficient method for overcoming coat-imposed dormancy and determine the optimal germination temperature for Ornithopus pinnatus seeds. Treatments to overcome dormancy were: intact seeds; immersion in hot water at 60 ºC, followed by soaking in the same water (unheated)/24 h; immersion in hot water at 90 ºC, followed by soaking in the same water (unheated)/24 h; mechanical scarification; chemical scarification, H2SO4/5 min; and chemical scarification, H2SO4/10 min. Percentages were calculated for germinated, abnormal, dormant, and dead seeds. Optimal germination temperatures were calculated using eight constant temperatures (0, 5, 10, 15, 20, 25, 30, and 35 °C), with 8 h of light and 16 h of darkness. Germination rate, frequency, and synchronization index of germination were used as parameters to establish optimum temperature for germination. A completely randomized experimental design was used, with twelve repetitions of 100 seeds per treatment. Data obtained were subjected to analysis of variance and Tukey’s test at a 5% significance level. O. pinnatus seeds exhibit dormancy caused by the seed coat’s impermeability to water. Mechanical scarification was efficient in promoting seed germination. The species is stenothermal, meaning it cannot tolerate significant temperature variations. The germination rate of seeds was linearly dependent on temperature. Synchronization of the germination process is greater in the optimum temperature range, established between 15 and 20 °C. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015 |
dc.date.accessioned.fl_str_mv |
2016-08-17T02:16:29Z |
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info:eu-repo/semantics/article info:eu-repo/semantics/other |
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1516-3598 |
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000992956 |
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url |
http://hdl.handle.net/10183/147249 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 44, n.12 (dez. 2015) p.413-419 |
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openAccess |
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application/pdf |
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