O tempo térmico para germinação varia entre populações de uma leguminosa arbórea (Peltophorum dubium)?

Detalhes bibliográficos
Autor(a) principal: Andrade, L. F.D. [UNESP]
Data de Publicação: 2016
Outros Autores: Cardoso, V. J.M. [UNESP]
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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spelling 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
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