O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)?
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/1519-6984.18714 http://hdl.handle.net/11449/168738 |
Resumo: | Few works report the use of degree-days (DD) – used in crops to predict events and schedule management activities – to describe the germination of tropical trees. The cardinal temperatures (base, optimum and ceiling temperature) for germination of the species may vary depending on the seed provenance. Peltophorum dubium (Spreng.) Taub. is an early successional leguminous tree widely distributed in South America, often occurring as cultivated or naturalized trees, thus considered to be a good example for testing DD model in tree species. The main objective of this study was to describe the seed germination response of different populations of P. dubium as function of DD accumulation during germination assays in semi-controlled (fluctuating temperatures) conditions. Germination assays with manually scarified seeds sown in aluminum sheet trays filled with a composed substrate were performed under greenhouse conditions at different times. Three methods were employed in order to describe the accumulation of thermal time throughout the assays and, considering the seed lot and sowing time, a trapezoid area method was relatively more effective in describing the germination. The germination curves of P. dubium seeds from different populations, expressed in degree-days estimated directly from temperature records schedules, tend to be more clustered suggesting little variation among thermal time requirements in different seed provenances. Otherwise, the thermal time requirement can vary depending on the time of sowing, and any increase in DD requirement when the assays were performed under higher mean temperatures can be related to a thermal effect on the germination of scarified seeds. |
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O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)?Does thermal time for germination vary among populations of a tree legume (Peltophorum dubium)?CanafístulaDegree-dayFabaceae (Leguminosae)SeedFew works report the use of degree-days (DD) – used in crops to predict events and schedule management activities – to describe the germination of tropical trees. The cardinal temperatures (base, optimum and ceiling temperature) for germination of the species may vary depending on the seed provenance. Peltophorum dubium (Spreng.) Taub. is an early successional leguminous tree widely distributed in South America, often occurring as cultivated or naturalized trees, thus considered to be a good example for testing DD model in tree species. The main objective of this study was to describe the seed germination response of different populations of P. dubium as function of DD accumulation during germination assays in semi-controlled (fluctuating temperatures) conditions. Germination assays with manually scarified seeds sown in aluminum sheet trays filled with a composed substrate were performed under greenhouse conditions at different times. Three methods were employed in order to describe the accumulation of thermal time throughout the assays and, considering the seed lot and sowing time, a trapezoid area method was relatively more effective in describing the germination. The germination curves of P. dubium seeds from different populations, expressed in degree-days estimated directly from temperature records schedules, tend to be more clustered suggesting little variation among thermal time requirements in different seed provenances. Otherwise, the thermal time requirement can vary depending on the time of sowing, and any increase in DD requirement when the assays were performed under higher mean temperatures can be related to a thermal effect on the germination of scarified seeds.Departamento de Botânica Instituto de Biociências Universidade Estadual Paulista – UNESP, Av. 24-A, 1515Departamento de Botânica Instituto de Biociências Universidade Estadual Paulista – UNESP, Av. 24-A, 1515Universidade Estadual Paulista (Unesp)Andrade, L. F.D. [UNESP]Cardoso, V. J.M. [UNESP]2018-12-11T16:42:48Z2018-12-11T16:42:48Z2016-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article592-599application/pdfhttp://dx.doi.org/10.1590/1519-6984.18714Brazilian Journal of Biology, v. 76, n. 3, p. 592-599, 2016.1678-43751519-6984http://hdl.handle.net/11449/16873810.1590/1519-6984.18714S1519-698420160003005922-s2.0-84975159054S1519-69842016000300592.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Biology0,523info:eu-repo/semantics/openAccess2023-10-02T06:01:57Zoai:repositorio.unesp.br:11449/168738Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:44:03.140558Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? Does thermal time for germination vary among populations of a tree legume (Peltophorum dubium)? |
title |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
spellingShingle |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? Andrade, L. F.D. [UNESP] Canafístula Degree-day Fabaceae (Leguminosae) Seed |
title_short |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
title_full |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
title_fullStr |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
title_full_unstemmed |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
title_sort |
O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)? |
author |
Andrade, L. F.D. [UNESP] |
author_facet |
Andrade, L. F.D. [UNESP] Cardoso, V. J.M. [UNESP] |
author_role |
author |
author2 |
Cardoso, V. J.M. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Andrade, L. F.D. [UNESP] Cardoso, V. J.M. [UNESP] |
dc.subject.por.fl_str_mv |
Canafístula Degree-day Fabaceae (Leguminosae) Seed |
topic |
Canafístula Degree-day Fabaceae (Leguminosae) Seed |
description |
Few works report the use of degree-days (DD) – used in crops to predict events and schedule management activities – to describe the germination of tropical trees. The cardinal temperatures (base, optimum and ceiling temperature) for germination of the species may vary depending on the seed provenance. Peltophorum dubium (Spreng.) Taub. is an early successional leguminous tree widely distributed in South America, often occurring as cultivated or naturalized trees, thus considered to be a good example for testing DD model in tree species. The main objective of this study was to describe the seed germination response of different populations of P. dubium as function of DD accumulation during germination assays in semi-controlled (fluctuating temperatures) conditions. Germination assays with manually scarified seeds sown in aluminum sheet trays filled with a composed substrate were performed under greenhouse conditions at different times. Three methods were employed in order to describe the accumulation of thermal time throughout the assays and, considering the seed lot and sowing time, a trapezoid area method was relatively more effective in describing the germination. The germination curves of P. dubium seeds from different populations, expressed in degree-days estimated directly from temperature records schedules, tend to be more clustered suggesting little variation among thermal time requirements in different seed provenances. Otherwise, the thermal time requirement can vary depending on the time of sowing, and any increase in DD requirement when the assays were performed under higher mean temperatures can be related to a thermal effect on the germination of scarified seeds. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07-01 2018-12-11T16:42:48Z 2018-12-11T16:42:48Z |
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/10.1590/1519-6984.18714 Brazilian Journal of Biology, v. 76, n. 3, p. 592-599, 2016. 1678-4375 1519-6984 http://hdl.handle.net/11449/168738 10.1590/1519-6984.18714 S1519-69842016000300592 2-s2.0-84975159054 S1519-69842016000300592.pdf |
url |
http://dx.doi.org/10.1590/1519-6984.18714 http://hdl.handle.net/11449/168738 |
identifier_str_mv |
Brazilian Journal of Biology, v. 76, n. 3, p. 592-599, 2016. 1678-4375 1519-6984 10.1590/1519-6984.18714 S1519-69842016000300592 2-s2.0-84975159054 S1519-69842016000300592.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Biology 0,523 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
592-599 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_ |
1808128270003077120 |