Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/2317-1545v42224519 http://hdl.handle.net/11449/198739 |
Resumo: | Hydrotime (θH) models provide information on seed tolerance to low water potential and time to germination under different conditions. Here it was evaluated the capacity of graphic and probit model to describe germination parameters and germination times (t) in a tropical legume (Peltophorum dubium). Germination tests were conducted under reduced water potentials (polyethylene glycol solutions from 0 to-1.2 MPa) at 25 °C. Regression lines were applied to investigate the relationship between germination rates (1/t) and water potential for different germination percentages (fractions 10, 30, 50 and 70%). Those regressions were used in the graphic model to calculate θH (1/slope) and determine the base water potential (Ψb) as the point which the line intercepts the x-axis (G% = 0). In the probit model, germination percentages were transformed to probit units and plotted against Ψb-values to describe germination response under a single regression line. Values for θH varied from 1.8 to 2.0 MPa day in both models, and Ψb showed a normal distribution, as presupposed by the probit model. Predicted germination times (t10 and t50) mostly fell within observed times, thus showing biological relevance of the models to describe the effects of water potential on seed germination. |
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Effect of reduced water potential on seed germination of a forest tree: A hydrotime approachEfeito da redução do potencial hídrico na germinação de sementes de uma árvore tropical: Uma abordagem do tempo hídricoHydrotime modelOsmotic potentialPeltophorumProbitPsi-baseHydrotime (θH) models provide information on seed tolerance to low water potential and time to germination under different conditions. Here it was evaluated the capacity of graphic and probit model to describe germination parameters and germination times (t) in a tropical legume (Peltophorum dubium). Germination tests were conducted under reduced water potentials (polyethylene glycol solutions from 0 to-1.2 MPa) at 25 °C. Regression lines were applied to investigate the relationship between germination rates (1/t) and water potential for different germination percentages (fractions 10, 30, 50 and 70%). Those regressions were used in the graphic model to calculate θH (1/slope) and determine the base water potential (Ψb) as the point which the line intercepts the x-axis (G% = 0). In the probit model, germination percentages were transformed to probit units and plotted against Ψb-values to describe germination response under a single regression line. Values for θH varied from 1.8 to 2.0 MPa day in both models, and Ψb showed a normal distribution, as presupposed by the probit model. Predicted germination times (t10 and t50) mostly fell within observed times, thus showing biological relevance of the models to describe the effects of water potential on seed germination.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidade Estadual Paulista (UNESP) Instituto de Biociências Departamento de BotânicaUniversidade Estadual Paulista (UNESP) Instituto de Biociências Departamento de BotânicaCAPES: 001Universidade Estadual Paulista (Unesp)Daibes, Luís Felipe [UNESP]Cardoso, Victor J. M. [UNESP]2020-12-12T01:20:50Z2020-12-12T01:20:50Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1590/2317-1545v42224519Journal of Seed Science, v. 42.2317-1537http://hdl.handle.net/11449/19873910.1590/2317-1545v42224519S2317-153720200001001042-s2.0-85083333571S2317-15372020000100104.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Seed Scienceinfo:eu-repo/semantics/openAccess2023-10-25T06:12:44Zoai:repositorio.unesp.br:11449/198739Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-25T06:12:44Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach Efeito da redução do potencial hídrico na germinação de sementes de uma árvore tropical: Uma abordagem do tempo hídrico |
title |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
spellingShingle |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach Daibes, Luís Felipe [UNESP] Hydrotime model Osmotic potential Peltophorum Probit Psi-base |
title_short |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
title_full |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
title_fullStr |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
title_full_unstemmed |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
title_sort |
Effect of reduced water potential on seed germination of a forest tree: A hydrotime approach |
author |
Daibes, Luís Felipe [UNESP] |
author_facet |
Daibes, Luís Felipe [UNESP] Cardoso, Victor J. M. [UNESP] |
author_role |
author |
author2 |
Cardoso, Victor J. M. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Daibes, Luís Felipe [UNESP] Cardoso, Victor J. M. [UNESP] |
dc.subject.por.fl_str_mv |
Hydrotime model Osmotic potential Peltophorum Probit Psi-base |
topic |
Hydrotime model Osmotic potential Peltophorum Probit Psi-base |
description |
Hydrotime (θH) models provide information on seed tolerance to low water potential and time to germination under different conditions. Here it was evaluated the capacity of graphic and probit model to describe germination parameters and germination times (t) in a tropical legume (Peltophorum dubium). Germination tests were conducted under reduced water potentials (polyethylene glycol solutions from 0 to-1.2 MPa) at 25 °C. Regression lines were applied to investigate the relationship between germination rates (1/t) and water potential for different germination percentages (fractions 10, 30, 50 and 70%). Those regressions were used in the graphic model to calculate θH (1/slope) and determine the base water potential (Ψb) as the point which the line intercepts the x-axis (G% = 0). In the probit model, germination percentages were transformed to probit units and plotted against Ψb-values to describe germination response under a single regression line. Values for θH varied from 1.8 to 2.0 MPa day in both models, and Ψb showed a normal distribution, as presupposed by the probit model. Predicted germination times (t10 and t50) mostly fell within observed times, thus showing biological relevance of the models to describe the effects of water potential on seed germination. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:20:50Z 2020-12-12T01:20:50Z 2020-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/2317-1545v42224519 Journal of Seed Science, v. 42. 2317-1537 http://hdl.handle.net/11449/198739 10.1590/2317-1545v42224519 S2317-15372020000100104 2-s2.0-85083333571 S2317-15372020000100104.pdf |
url |
http://dx.doi.org/10.1590/2317-1545v42224519 http://hdl.handle.net/11449/198739 |
identifier_str_mv |
Journal of Seed Science, v. 42. 2317-1537 10.1590/2317-1545v42224519 S2317-15372020000100104 2-s2.0-85083333571 S2317-15372020000100104.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Seed Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803046159253504000 |