Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.arpnjournals.com/jabs/volume_07_2010.htm http://hdl.handle.net/11449/137182 |
Resumo: | Osmotic potentials on water uptake and germination of Guazuma Ulmifolia Lam. (Sterculiaceae) seeds. This work was carried out in the Germination Lab. of the Department of Botany, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, São Paulo State, Brazil. The aims of this work were to determine the water uptake curve and to evaluate the germination of Guazuma ulmifolia seeds subjected to different water potentials. For the water uptake curve, seven replicates of 50 pre-scarified seeds were placed onto paper moistened with 15 mL PEG 6000 solution under the potentials 0 (control), -0.3 and -0.6 MPa at 25o C in the darkness. For the germination assay, four replicates of 50 seeds were subjected to the same above-described conditions; however, one lot of seeds was modified when there was variation in the refractometric index, whereas the remaining ones were kept in the same solutions until the end of the experiment. All three phases of water uptake were detected under 0 and -0.3 MPa; however, phase II was prolonged under -0.6 MPa and germination was not observed. For 0 and -0.3 MPa, the adopted statistical models consisted of asymptotic (phases I and II) and exponential (phase III) functions, y = a*[1 - b*exp (-c*t) + exp (-d + e*(t - t0)]. For -0.6MPa, only the asymptotic function y = a* [1 - b* exp (-c*t)] was used since there was no evidence of germination. The germination final percentage and speed index were lower under -0.3 MPa, mainly when solutions were not replaced; besides, germination was not detected under -0.6 MPa, with or without solution replacement. |
id |
UNSP_08b8c87624deb2a17e8e31b60014c2fa |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/137182 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seedsModelImbibitionForest seedWater stressOsmotic potentials on water uptake and germination of Guazuma Ulmifolia Lam. (Sterculiaceae) seeds. This work was carried out in the Germination Lab. of the Department of Botany, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, São Paulo State, Brazil. The aims of this work were to determine the water uptake curve and to evaluate the germination of Guazuma ulmifolia seeds subjected to different water potentials. For the water uptake curve, seven replicates of 50 pre-scarified seeds were placed onto paper moistened with 15 mL PEG 6000 solution under the potentials 0 (control), -0.3 and -0.6 MPa at 25o C in the darkness. For the germination assay, four replicates of 50 seeds were subjected to the same above-described conditions; however, one lot of seeds was modified when there was variation in the refractometric index, whereas the remaining ones were kept in the same solutions until the end of the experiment. All three phases of water uptake were detected under 0 and -0.3 MPa; however, phase II was prolonged under -0.6 MPa and germination was not observed. For 0 and -0.3 MPa, the adopted statistical models consisted of asymptotic (phases I and II) and exponential (phase III) functions, y = a*[1 - b*exp (-c*t) + exp (-d + e*(t - t0)]. For -0.6MPa, only the asymptotic function y = a* [1 - b* exp (-c*t)] was used since there was no evidence of germination. The germination final percentage and speed index were lower under -0.3 MPa, mainly when solutions were not replaced; besides, germination was not detected under -0.6 MPa, with or without solution replacement.Universidade Federal de Mato Grosso (UFMT), Departamento de Agronomia, Sinop, MT, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Instituto de Biociências de Botucatu (IBB), Departamento de Botânica, Botucatu, SP, BrasilUniversidade do Estado de Mato Grosso (UNEMAT), Departamento de Biologia, Alta Floresta, MT, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Instituto de Biociências de Botucatu (IBB), Departamento de Botânica, Botucatu, SP, BrasilUniversidade Estadual Paulista (Unesp)Universidade Federal de Mato Grosso (UFMT)Universidade do Estado de Mato Grosso (UNEMAT)Braga, João FilgueirasDelachiave, Maria Elena Aparecida [UNESP]Pinho, Sheila Zambello de [UNESP]Braga, Lúcia FilgueirasSouza, Marcilio Pereira2016-04-01T18:44:33Z2016-04-01T18:44:33Z2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article32-37application/pdfhttp://www.arpnjournals.com/jabs/volume_07_2010.htmJournal of Agricultural and Biological Science, v. 5, n. 4, p. 32-37, 2010.1990-6145http://hdl.handle.net/11449/137182ISSN1990-6145-2010-05-04-32-37.pdf4114376721873156Currículo Lattesreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Agricultural and Biological Scienceinfo:eu-repo/semantics/openAccess2023-12-23T06:17:41Zoai:repositorio.unesp.br:11449/137182Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:05:17.428286Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
title |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
spellingShingle |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds Braga, João Filgueiras Model Imbibition Forest seed Water stress |
title_short |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
title_full |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
title_fullStr |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
title_full_unstemmed |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
title_sort |
Osmotic potentials on water uptake and germination of Guazuma ulmifolia Lam. (Sterculiaceae) seeds |
author |
Braga, João Filgueiras |
author_facet |
Braga, João Filgueiras Delachiave, Maria Elena Aparecida [UNESP] Pinho, Sheila Zambello de [UNESP] Braga, Lúcia Filgueiras Souza, Marcilio Pereira |
author_role |
author |
author2 |
Delachiave, Maria Elena Aparecida [UNESP] Pinho, Sheila Zambello de [UNESP] Braga, Lúcia Filgueiras Souza, Marcilio Pereira |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Mato Grosso (UFMT) Universidade do Estado de Mato Grosso (UNEMAT) |
dc.contributor.author.fl_str_mv |
Braga, João Filgueiras Delachiave, Maria Elena Aparecida [UNESP] Pinho, Sheila Zambello de [UNESP] Braga, Lúcia Filgueiras Souza, Marcilio Pereira |
dc.subject.por.fl_str_mv |
Model Imbibition Forest seed Water stress |
topic |
Model Imbibition Forest seed Water stress |
description |
Osmotic potentials on water uptake and germination of Guazuma Ulmifolia Lam. (Sterculiaceae) seeds. This work was carried out in the Germination Lab. of the Department of Botany, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, São Paulo State, Brazil. The aims of this work were to determine the water uptake curve and to evaluate the germination of Guazuma ulmifolia seeds subjected to different water potentials. For the water uptake curve, seven replicates of 50 pre-scarified seeds were placed onto paper moistened with 15 mL PEG 6000 solution under the potentials 0 (control), -0.3 and -0.6 MPa at 25o C in the darkness. For the germination assay, four replicates of 50 seeds were subjected to the same above-described conditions; however, one lot of seeds was modified when there was variation in the refractometric index, whereas the remaining ones were kept in the same solutions until the end of the experiment. All three phases of water uptake were detected under 0 and -0.3 MPa; however, phase II was prolonged under -0.6 MPa and germination was not observed. For 0 and -0.3 MPa, the adopted statistical models consisted of asymptotic (phases I and II) and exponential (phase III) functions, y = a*[1 - b*exp (-c*t) + exp (-d + e*(t - t0)]. For -0.6MPa, only the asymptotic function y = a* [1 - b* exp (-c*t)] was used since there was no evidence of germination. The germination final percentage and speed index were lower under -0.3 MPa, mainly when solutions were not replaced; besides, germination was not detected under -0.6 MPa, with or without solution replacement. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 2016-04-01T18:44:33Z 2016-04-01T18:44:33Z |
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://www.arpnjournals.com/jabs/volume_07_2010.htm Journal of Agricultural and Biological Science, v. 5, n. 4, p. 32-37, 2010. 1990-6145 http://hdl.handle.net/11449/137182 ISSN1990-6145-2010-05-04-32-37.pdf 4114376721873156 |
url |
http://www.arpnjournals.com/jabs/volume_07_2010.htm http://hdl.handle.net/11449/137182 |
identifier_str_mv |
Journal of Agricultural and Biological Science, v. 5, n. 4, p. 32-37, 2010. 1990-6145 ISSN1990-6145-2010-05-04-32-37.pdf 4114376721873156 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Agricultural and Biological Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
32-37 application/pdf |
dc.source.none.fl_str_mv |
Currículo Lattes 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_ |
1808129282472411136 |