Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.

Detalhes bibliográficos
Autor(a) principal: GOMES, S. E. V.
Data de Publicação: 2019
Outros Autores: OLIVEIRA, G. M. de, ARAÚJO, M. do N., SEAL, C. E., DANTAS, B. F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113193
Resumo: Seasonally tropical dry forests are among the most threatened environments by climate change. However, these forests, which are at risk of desertification, are still poorly studied and conserved. Seeds of several species endemic to the Caatinga, a Brazilian dry forest, are also understudied, mainly regarding their ability to cope with a hotter and drier climate predicted for the future. For the first time in seeds of Cenostigma microphyllum (Leguminosae), we aimed to study the presence of physical dormancy, temperature and salt tolerance to ascertain the effects of current and future climate on seed germination. Intact and scarified seeds were investigated by incubating at constant temperatures (15 to 40°C) or in NaCl solutions (?0.2 to ?1.0 MPa) at 25 and 30°C. Thermal and osmotic thresholds, as well as thermal time and hydrotime constants, were calculated using linear regressions between the germination conditions and germination rate. To predict germination in the future, a heat sum model based on thermal time and hydrotime was applied to current and future climate scenarios. Seeds of C. microphyllum were permeable to water and did not have physical dormancy. The results indicated that increases in temperature are unlikely to affect germination, despite greater sensitivity to salinity presented at higher temperatures. In a future climate, the reduction in the number of weeks with at least 15 mm rainfall will affect the germination timing for the seeds. Thus, we can conclude that under the most pessimistic climate scenario predicted for the future, the seed germination of C. microphyllum may be restricted, likely leading to low seedling recruitment and establishment.
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spelling Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.Cenostigma microphyllumEstresse por salSementeGerminaçãoMudança ClimáticaTemperaturaCaatingaSeasonally tropical dry forests are among the most threatened environments by climate change. However, these forests, which are at risk of desertification, are still poorly studied and conserved. Seeds of several species endemic to the Caatinga, a Brazilian dry forest, are also understudied, mainly regarding their ability to cope with a hotter and drier climate predicted for the future. For the first time in seeds of Cenostigma microphyllum (Leguminosae), we aimed to study the presence of physical dormancy, temperature and salt tolerance to ascertain the effects of current and future climate on seed germination. Intact and scarified seeds were investigated by incubating at constant temperatures (15 to 40°C) or in NaCl solutions (?0.2 to ?1.0 MPa) at 25 and 30°C. Thermal and osmotic thresholds, as well as thermal time and hydrotime constants, were calculated using linear regressions between the germination conditions and germination rate. To predict germination in the future, a heat sum model based on thermal time and hydrotime was applied to current and future climate scenarios. Seeds of C. microphyllum were permeable to water and did not have physical dormancy. The results indicated that increases in temperature are unlikely to affect germination, despite greater sensitivity to salinity presented at higher temperatures. In a future climate, the reduction in the number of weeks with at least 15 mm rainfall will affect the germination timing for the seeds. Thus, we can conclude that under the most pessimistic climate scenario predicted for the future, the seed germination of C. microphyllum may be restricted, likely leading to low seedling recruitment and establishment.SAMARA ELIZABETH VIEIRA GOMES; GILMARA MOREIRA DE OLIVEIRA; MARCELO DO NASCIMENTO ARAUJO; CHARLOTTE E. SEAL; BARBARA FRANCA DANTAS, CPATSA.GOMES, S. E. V.OLIVEIRA, G. M. deARAÚJO, M. do N.SEAL, C. E.DANTAS, B. F.2020-02-10T18:09:11Z2020-02-10T18:09:11Z2019-10-1720192020-02-10T18:09:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleFolia Geobotanica, v. 54, p. 19-28, 2019.http://www.alice.cnptia.embrapa.br/alice/handle/doc/111319310.1007/s12224-019-09353-4enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2020-02-10T18:09:17Zoai:www.alice.cnptia.embrapa.br:doc/1113193Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542020-02-10T18:09:17falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542020-02-10T18:09:17Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
title Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
spellingShingle Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
GOMES, S. E. V.
Cenostigma microphyllum
Estresse por sal
Semente
Germinação
Mudança Climática
Temperatura
Caatinga
title_short Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
title_full Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
title_fullStr Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
title_full_unstemmed Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
title_sort Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis.
author GOMES, S. E. V.
author_facet GOMES, S. E. V.
OLIVEIRA, G. M. de
ARAÚJO, M. do N.
SEAL, C. E.
DANTAS, B. F.
author_role author
author2 OLIVEIRA, G. M. de
ARAÚJO, M. do N.
SEAL, C. E.
DANTAS, B. F.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv SAMARA ELIZABETH VIEIRA GOMES; GILMARA MOREIRA DE OLIVEIRA; MARCELO DO NASCIMENTO ARAUJO; CHARLOTTE E. SEAL; BARBARA FRANCA DANTAS, CPATSA.
dc.contributor.author.fl_str_mv GOMES, S. E. V.
OLIVEIRA, G. M. de
ARAÚJO, M. do N.
SEAL, C. E.
DANTAS, B. F.
dc.subject.por.fl_str_mv Cenostigma microphyllum
Estresse por sal
Semente
Germinação
Mudança Climática
Temperatura
Caatinga
topic Cenostigma microphyllum
Estresse por sal
Semente
Germinação
Mudança Climática
Temperatura
Caatinga
description Seasonally tropical dry forests are among the most threatened environments by climate change. However, these forests, which are at risk of desertification, are still poorly studied and conserved. Seeds of several species endemic to the Caatinga, a Brazilian dry forest, are also understudied, mainly regarding their ability to cope with a hotter and drier climate predicted for the future. For the first time in seeds of Cenostigma microphyllum (Leguminosae), we aimed to study the presence of physical dormancy, temperature and salt tolerance to ascertain the effects of current and future climate on seed germination. Intact and scarified seeds were investigated by incubating at constant temperatures (15 to 40°C) or in NaCl solutions (?0.2 to ?1.0 MPa) at 25 and 30°C. Thermal and osmotic thresholds, as well as thermal time and hydrotime constants, were calculated using linear regressions between the germination conditions and germination rate. To predict germination in the future, a heat sum model based on thermal time and hydrotime was applied to current and future climate scenarios. Seeds of C. microphyllum were permeable to water and did not have physical dormancy. The results indicated that increases in temperature are unlikely to affect germination, despite greater sensitivity to salinity presented at higher temperatures. In a future climate, the reduction in the number of weeks with at least 15 mm rainfall will affect the germination timing for the seeds. Thus, we can conclude that under the most pessimistic climate scenario predicted for the future, the seed germination of C. microphyllum may be restricted, likely leading to low seedling recruitment and establishment.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-17
2019
2020-02-10T18:09:11Z
2020-02-10T18:09:11Z
2020-02-10T18:09:11Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Folia Geobotanica, v. 54, p. 19-28, 2019.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113193
10.1007/s12224-019-09353-4
identifier_str_mv Folia Geobotanica, v. 54, p. 19-28, 2019.
10.1007/s12224-019-09353-4
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113193
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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