Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1017/S0960258519000096 http://hdl.handle.net/11449/187718 |
Resumo: | Regeneration from seed affects species assembly in plant communities, and temperature is the most important environmental factor controlling the germination process. Thermal dependence of seed germination is thus associated with species occurrence in an ecosystem. Hence, we aimed to investigate the role of temperature on seed germination of ten tree species from the western Brazilian Amazon. Seeds were collected in the state of Rondônia, Brazil, and set to germinate under constant temperatures ranging from 10 to 40°C in germination chambers. We calculated germination capacity (G%), germination rate (GR50, reciprocal of germination time), and thermal parameters, such as cardinal temperatures and thermal time requirements. Most species had a large range of temperatures showing G% ≥80%, with optimal temperature varying from 20 to 40°C. Base temperature ranged from 6 to 12°C and ceiling temperatures were mainly >40°C. Astronium lecointei and Parkia nitida showed high germination capacity under temperatures of 35-40°C, while germination of Theobroma cacao dropped from 100% to zero under temperatures between 37 and 40°C. The climax species Cedrela fissilis had the slowest germination time (10 days) and highest thermal time requirement, while seeds of Enterolobium schomburgkii (a late-successional species) germinated within the first day of the experiment. Rapid recruitment of Amazon species could be favoured with treefall disturbance, which increases temperatures in the understory, but sharp limits might be found in the supra-optimal range of temperatures. Such patterns might indicate different regeneration strategies in the tropical rainforest, providing important information regarding seed germination among Amazon species. |
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Thermal requirements of seed germination of ten tree species occurring in the western Brazilian AmazonAmazoniacardinal temperaturerainforestregeneration nichetemperaturethermal timetropical forestRegeneration from seed affects species assembly in plant communities, and temperature is the most important environmental factor controlling the germination process. Thermal dependence of seed germination is thus associated with species occurrence in an ecosystem. Hence, we aimed to investigate the role of temperature on seed germination of ten tree species from the western Brazilian Amazon. Seeds were collected in the state of Rondônia, Brazil, and set to germinate under constant temperatures ranging from 10 to 40°C in germination chambers. We calculated germination capacity (G%), germination rate (GR50, reciprocal of germination time), and thermal parameters, such as cardinal temperatures and thermal time requirements. Most species had a large range of temperatures showing G% ≥80%, with optimal temperature varying from 20 to 40°C. Base temperature ranged from 6 to 12°C and ceiling temperatures were mainly >40°C. Astronium lecointei and Parkia nitida showed high germination capacity under temperatures of 35-40°C, while germination of Theobroma cacao dropped from 100% to zero under temperatures between 37 and 40°C. The climax species Cedrela fissilis had the slowest germination time (10 days) and highest thermal time requirement, while seeds of Enterolobium schomburgkii (a late-successional species) germinated within the first day of the experiment. Rapid recruitment of Amazon species could be favoured with treefall disturbance, which increases temperatures in the understory, but sharp limits might be found in the supra-optimal range of temperatures. Such patterns might indicate different regeneration strategies in the tropical rainforest, providing important information regarding seed germination among Amazon species.Universidade Federal de Rondônia (UNIR) Departamento de Biologia, BR-364Universidade Estadual Paulista (UNESP) I.B. Departamento de Botânica, Av. 24A 1515Instituto Nacional de Pesquisas da Amazônia (INPA) Laboratório de Sementes, Av. André Araujo 2936Universidade Federal de Pelotas (UFPel) Centro de Artes, Rua Álvaro Chaves 65Universidade Federal Do Espírito Santo (UFES) Departamento de Ciências Biológicas, Av. Fernando Ferrari 514Universidade Estadual Paulista (UNESP) I.B. Departamento de Botânica, Av. 24A 1515Universidade Federal de Rondônia (UNIR)Universidade Estadual Paulista (Unesp)Laboratório de SementesUniversidade Federal de Pernambuco (UFPE)Universidade Federal do Espírito Santo (UFES)Felipe Daibes, L. F. [UNESP]Amoêdo, Semirian C.Nascimento Moraes, Jeane DoFenelon, NatáliaDa Silva, Débora RosaDe Melo Lopes, Max JrVargas, Lidiane A.Monteiro, Ediléia F.Frigeri, Renita B.C.2019-10-06T15:45:09Z2019-10-06T15:45:09Z2019-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article115-123http://dx.doi.org/10.1017/S0960258519000096Seed Science Research, v. 29, n. 2, p. 115-123, 2019.0960-2585http://hdl.handle.net/11449/18771810.1017/S09602585190000962-s2.0-85066802783Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSeed Science Researchinfo:eu-repo/semantics/openAccess2021-10-22T18:20:55Zoai:repositorio.unesp.br:11449/187718Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T18:20:55Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
title |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
spellingShingle |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon Felipe Daibes, L. F. [UNESP] Amazonia cardinal temperature rainforest regeneration niche temperature thermal time tropical forest |
title_short |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
title_full |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
title_fullStr |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
title_full_unstemmed |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
title_sort |
Thermal requirements of seed germination of ten tree species occurring in the western Brazilian Amazon |
author |
Felipe Daibes, L. F. [UNESP] |
author_facet |
Felipe Daibes, L. F. [UNESP] Amoêdo, Semirian C. Nascimento Moraes, Jeane Do Fenelon, Natália Da Silva, Débora Rosa De Melo Lopes, Max Jr Vargas, Lidiane A. Monteiro, Ediléia F. Frigeri, Renita B.C. |
author_role |
author |
author2 |
Amoêdo, Semirian C. Nascimento Moraes, Jeane Do Fenelon, Natália Da Silva, Débora Rosa De Melo Lopes, Max Jr Vargas, Lidiane A. Monteiro, Ediléia F. Frigeri, Renita B.C. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Rondônia (UNIR) Universidade Estadual Paulista (Unesp) Laboratório de Sementes Universidade Federal de Pernambuco (UFPE) Universidade Federal do Espírito Santo (UFES) |
dc.contributor.author.fl_str_mv |
Felipe Daibes, L. F. [UNESP] Amoêdo, Semirian C. Nascimento Moraes, Jeane Do Fenelon, Natália Da Silva, Débora Rosa De Melo Lopes, Max Jr Vargas, Lidiane A. Monteiro, Ediléia F. Frigeri, Renita B.C. |
dc.subject.por.fl_str_mv |
Amazonia cardinal temperature rainforest regeneration niche temperature thermal time tropical forest |
topic |
Amazonia cardinal temperature rainforest regeneration niche temperature thermal time tropical forest |
description |
Regeneration from seed affects species assembly in plant communities, and temperature is the most important environmental factor controlling the germination process. Thermal dependence of seed germination is thus associated with species occurrence in an ecosystem. Hence, we aimed to investigate the role of temperature on seed germination of ten tree species from the western Brazilian Amazon. Seeds were collected in the state of Rondônia, Brazil, and set to germinate under constant temperatures ranging from 10 to 40°C in germination chambers. We calculated germination capacity (G%), germination rate (GR50, reciprocal of germination time), and thermal parameters, such as cardinal temperatures and thermal time requirements. Most species had a large range of temperatures showing G% ≥80%, with optimal temperature varying from 20 to 40°C. Base temperature ranged from 6 to 12°C and ceiling temperatures were mainly >40°C. Astronium lecointei and Parkia nitida showed high germination capacity under temperatures of 35-40°C, while germination of Theobroma cacao dropped from 100% to zero under temperatures between 37 and 40°C. The climax species Cedrela fissilis had the slowest germination time (10 days) and highest thermal time requirement, while seeds of Enterolobium schomburgkii (a late-successional species) germinated within the first day of the experiment. Rapid recruitment of Amazon species could be favoured with treefall disturbance, which increases temperatures in the understory, but sharp limits might be found in the supra-optimal range of temperatures. Such patterns might indicate different regeneration strategies in the tropical rainforest, providing important information regarding seed germination among Amazon species. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T15:45:09Z 2019-10-06T15:45:09Z 2019-06-01 |
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/10.1017/S0960258519000096 Seed Science Research, v. 29, n. 2, p. 115-123, 2019. 0960-2585 http://hdl.handle.net/11449/187718 10.1017/S0960258519000096 2-s2.0-85066802783 |
url |
http://dx.doi.org/10.1017/S0960258519000096 http://hdl.handle.net/11449/187718 |
identifier_str_mv |
Seed Science Research, v. 29, n. 2, p. 115-123, 2019. 0960-2585 10.1017/S0960258519000096 2-s2.0-85066802783 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Seed Science Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
115-123 |
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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1799964788031225856 |