Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.flora.2021.151801 http://hdl.handle.net/11449/210249 |
Resumo: | Contrasting responses of seed germination to fire have been reported in different vegetation worldwide. In Brazil, the Pantanal harbors one of the world?s most extensive floodplains, marked by flooding periods alternating with a dry fire-prone season. The present study aimed to understand the role of fire on regeneration from seed in the Pantanal wetland, using two pioneer species displaying physically dormant seeds as study models: Sesbania virgata (Cav.) Pers. and Guazuma ulmifolia Lam. Seeds were subjected to (1) heat shocks and (2) experimental burns, besides the controls. In Experiment 1, heat shocks of 65, 85, 105, 125, and 145?C (all treatments ? 5?C), were applied for 5 minutes of exposure. In Experiment 2, seeds and corky fruits were placed upon the soil surface, and seeds were buried at 2 cm belowground, then subjected to experimental burns. Germination trials were conducted under optimal conditions and recorded the proportions of germinated, hard, and dead seeds. Increasing temperature of heat shocks had an increasingly negative effect on seed water content and germination of both species as well as increasing the proportion of dead seeds. A slight enhancement in germination of buried seeds (18%) was found in the experimental burns for S. virgata seeds. Moreover, buried seeds remained hard (dormant) up to 80 and 40% for S. virgata and G. ulmifolia, respectively. Inside the corky fruits, seed germination was not promoted, and there was a decrease in the proportion of hard seeds after burning, while direct exposure to fire killed nearly all seeds placed upon the soil surface. Fire has little to no effect on the enhancement of seed germination, but seeds mainly survive when buried belowground. Our study provides crucial information to understand seed tolerance to increased fire occurrence in disturbed tropical wetlands. |
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Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetlandGuazumaHeat shockPhysical dormancyPantanalRiparian forestSesbaniaContrasting responses of seed germination to fire have been reported in different vegetation worldwide. In Brazil, the Pantanal harbors one of the world?s most extensive floodplains, marked by flooding periods alternating with a dry fire-prone season. The present study aimed to understand the role of fire on regeneration from seed in the Pantanal wetland, using two pioneer species displaying physically dormant seeds as study models: Sesbania virgata (Cav.) Pers. and Guazuma ulmifolia Lam. Seeds were subjected to (1) heat shocks and (2) experimental burns, besides the controls. In Experiment 1, heat shocks of 65, 85, 105, 125, and 145?C (all treatments ? 5?C), were applied for 5 minutes of exposure. In Experiment 2, seeds and corky fruits were placed upon the soil surface, and seeds were buried at 2 cm belowground, then subjected to experimental burns. Germination trials were conducted under optimal conditions and recorded the proportions of germinated, hard, and dead seeds. Increasing temperature of heat shocks had an increasingly negative effect on seed water content and germination of both species as well as increasing the proportion of dead seeds. A slight enhancement in germination of buried seeds (18%) was found in the experimental burns for S. virgata seeds. Moreover, buried seeds remained hard (dormant) up to 80 and 40% for S. virgata and G. ulmifolia, respectively. Inside the corky fruits, seed germination was not promoted, and there was a decrease in the proportion of hard seeds after burning, while direct exposure to fire killed nearly all seeds placed upon the soil surface. Fire has little to no effect on the enhancement of seed germination, but seeds mainly survive when buried belowground. Our study provides crucial information to understand seed tolerance to increased fire occurrence in disturbed tropical wetlands.National Institute of Science and Technology of Wetlands (INAU)Foundation for Support of the Development of Education, Science and Technology of the State of Mato Grosso do Sul (FUNDECT)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed Mato Grosso do Sul UFMS, Programa Posgrad Biol Vegetal, Inst Biociencias, Lab Sementes Bot, Cidade Univ,Caixa Postal 549, BR-79070900 Campo Grande, MS, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Bot, UNESP, Av 24-A 1515, BR-13506900 Rio Claro, SP, BrazilUniv Fed Mato Grosso do Sul UFMS, Programa Posgrad Biol Vegetal, Inst Biociencias, Lab Ecol Vegetal, Cidade Univ,Caixa Postal 549, BR-79070900 Campo Grande, MS, BrazilUniv Florida, Sch Forest Resources & Conservat, Ecol Restorat Grad Certificate Program, Gainesville, FL 32603 USAUniv Estadual Paulista, Inst Biociencias, Dept Bot, UNESP, Av 24-A 1515, BR-13506900 Rio Claro, SP, BrazilNational Institute of Science and Technology of Wetlands (INAU): 610033/2009-3Foundation for Support of the Development of Education, Science and Technology of the State of Mato Grosso do Sul (FUNDECT): 23/200.028/2009CNPq: 303191/2017-1CNPq: 307429/2019-9Elsevier B.V.Universidade Federal de Mato Grosso do Sul (UFMS)Universidade Estadual Paulista (Unesp)Univ FloridaSoares, Vanessa C.Scremin-Dias, EdnaFelipe Daibes, L. [UNESP]Damasceno-Junior, Geraldo A.Pott, ArnildoLima, Liana B. de2021-06-25T15:02:40Z2021-06-25T15:02:40Z2021-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9http://dx.doi.org/10.1016/j.flora.2021.151801Flora. Munich: Elsevier Gmbh, v. 278, 9 p., 2021.0367-2530http://hdl.handle.net/11449/21024910.1016/j.flora.2021.151801WOS:000641447200002Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFlorainfo:eu-repo/semantics/openAccess2021-10-23T20:11:47Zoai:repositorio.unesp.br:11449/210249Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:52:56.069952Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
title |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
spellingShingle |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland Soares, Vanessa C. Guazuma Heat shock Physical dormancy Pantanal Riparian forest Sesbania |
title_short |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
title_full |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
title_fullStr |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
title_full_unstemmed |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
title_sort |
Fire has little to no effect on the enhancement of germination, but buried seeds may survive in a Neotropical wetland |
author |
Soares, Vanessa C. |
author_facet |
Soares, Vanessa C. Scremin-Dias, Edna Felipe Daibes, L. [UNESP] Damasceno-Junior, Geraldo A. Pott, Arnildo Lima, Liana B. de |
author_role |
author |
author2 |
Scremin-Dias, Edna Felipe Daibes, L. [UNESP] Damasceno-Junior, Geraldo A. Pott, Arnildo Lima, Liana B. de |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Mato Grosso do Sul (UFMS) Universidade Estadual Paulista (Unesp) Univ Florida |
dc.contributor.author.fl_str_mv |
Soares, Vanessa C. Scremin-Dias, Edna Felipe Daibes, L. [UNESP] Damasceno-Junior, Geraldo A. Pott, Arnildo Lima, Liana B. de |
dc.subject.por.fl_str_mv |
Guazuma Heat shock Physical dormancy Pantanal Riparian forest Sesbania |
topic |
Guazuma Heat shock Physical dormancy Pantanal Riparian forest Sesbania |
description |
Contrasting responses of seed germination to fire have been reported in different vegetation worldwide. In Brazil, the Pantanal harbors one of the world?s most extensive floodplains, marked by flooding periods alternating with a dry fire-prone season. The present study aimed to understand the role of fire on regeneration from seed in the Pantanal wetland, using two pioneer species displaying physically dormant seeds as study models: Sesbania virgata (Cav.) Pers. and Guazuma ulmifolia Lam. Seeds were subjected to (1) heat shocks and (2) experimental burns, besides the controls. In Experiment 1, heat shocks of 65, 85, 105, 125, and 145?C (all treatments ? 5?C), were applied for 5 minutes of exposure. In Experiment 2, seeds and corky fruits were placed upon the soil surface, and seeds were buried at 2 cm belowground, then subjected to experimental burns. Germination trials were conducted under optimal conditions and recorded the proportions of germinated, hard, and dead seeds. Increasing temperature of heat shocks had an increasingly negative effect on seed water content and germination of both species as well as increasing the proportion of dead seeds. A slight enhancement in germination of buried seeds (18%) was found in the experimental burns for S. virgata seeds. Moreover, buried seeds remained hard (dormant) up to 80 and 40% for S. virgata and G. ulmifolia, respectively. Inside the corky fruits, seed germination was not promoted, and there was a decrease in the proportion of hard seeds after burning, while direct exposure to fire killed nearly all seeds placed upon the soil surface. Fire has little to no effect on the enhancement of seed germination, but seeds mainly survive when buried belowground. Our study provides crucial information to understand seed tolerance to increased fire occurrence in disturbed tropical wetlands. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T15:02:40Z 2021-06-25T15:02:40Z 2021-05-01 |
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/10.1016/j.flora.2021.151801 Flora. Munich: Elsevier Gmbh, v. 278, 9 p., 2021. 0367-2530 http://hdl.handle.net/11449/210249 10.1016/j.flora.2021.151801 WOS:000641447200002 |
url |
http://dx.doi.org/10.1016/j.flora.2021.151801 http://hdl.handle.net/11449/210249 |
identifier_str_mv |
Flora. Munich: Elsevier Gmbh, v. 278, 9 p., 2021. 0367-2530 10.1016/j.flora.2021.151801 WOS:000641447200002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Flora |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
9 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science 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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1808129469631692800 |