Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality

Detalhes bibliográficos
Autor(a) principal: Escobar, Diego F.E [UNESP]
Data de Publicação: 2018
Outros Autores: Silveira, Fernando A.O, Morellato, Leonor Patricia C [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1093/aob/mcy006
http://hdl.handle.net/11449/179861
Resumo: Background and Aims The relationship between fruiting phenology and seed dispersal syndrome is widely recognized; however, the interaction of dormancy classes and plant life-history traits in relation to fruiting phenology and seed dispersal is understudied. Here we examined the relationship between fruiting season and seed dormancy and how this relationship is modulated by dormancy classes, dispersal syndromes, seed mass and seed moisture content in a Brazilian savanna (cerrado). Methods Dormancy classes (non-dormancy and physical, morphological, morphophysiological, physiological and physiophysical dormancy) of 34 cerrado species were experimentally determined. Their seed dispersal syndrome (autochory, anemochory, zoochory), dispersal season (rainy, dry, rainy-to-dry and dry-to-rainy transitions), seed mass and moisture contents, and the estimated germination date were also determined. Log-linear models were used to evaluate how dormancy and dormancy classes are related to dispersal season and syndrome. Key Results The proportions of dormant and non-dormant species were similar in cerrado. The communityestimated germination date was seasonal, occurring at the onset of rainy season. Overall, anemochorous nondormant species released seeds during the dry-to-rainy transition; autochorous physically dormant species dispersed seeds during the dry season and rainy-to-dry transition; zoochorous species dispersed non-dormant seeds during the dry and rainy seasons, while species with morphological, morphophysiological or physiological dormancy dispersed seeds in the transitional seasons. Seed mass differed among dispersal seasons and dormancy classes, but seed moisture content did not vary with dispersal syndrome, season or dormancy class. Conclusions The beginning of the rainy season was the most favourable period for seed germination in cerrado, and the germination phenology was controlled by both the timing of seed dispersal and seed dormancy. Dormancy class was influenced by dispersal syndrome and season. Moreover, dormancy avoided seed germination during the rainy-to-dry transition, independently of dispersal syndrome. The variability of dormancy classes with dispersal syndrome allowed animal-dispersed species to fruit all year round, but seeds germinated only during the rainy season. Conversely, seasonally restricted wind-dispersal species dispersed and germinated their non-dormant seeds only in the rainy season.
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spelling Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonalityCerradodispersal syndromesdormancy classesfruiting phenologygermination phenologyneotropical savannaBackground and Aims The relationship between fruiting phenology and seed dispersal syndrome is widely recognized; however, the interaction of dormancy classes and plant life-history traits in relation to fruiting phenology and seed dispersal is understudied. Here we examined the relationship between fruiting season and seed dormancy and how this relationship is modulated by dormancy classes, dispersal syndromes, seed mass and seed moisture content in a Brazilian savanna (cerrado). Methods Dormancy classes (non-dormancy and physical, morphological, morphophysiological, physiological and physiophysical dormancy) of 34 cerrado species were experimentally determined. Their seed dispersal syndrome (autochory, anemochory, zoochory), dispersal season (rainy, dry, rainy-to-dry and dry-to-rainy transitions), seed mass and moisture contents, and the estimated germination date were also determined. Log-linear models were used to evaluate how dormancy and dormancy classes are related to dispersal season and syndrome. Key Results The proportions of dormant and non-dormant species were similar in cerrado. The communityestimated germination date was seasonal, occurring at the onset of rainy season. Overall, anemochorous nondormant species released seeds during the dry-to-rainy transition; autochorous physically dormant species dispersed seeds during the dry season and rainy-to-dry transition; zoochorous species dispersed non-dormant seeds during the dry and rainy seasons, while species with morphological, morphophysiological or physiological dormancy dispersed seeds in the transitional seasons. Seed mass differed among dispersal seasons and dormancy classes, but seed moisture content did not vary with dispersal syndrome, season or dormancy class. Conclusions The beginning of the rainy season was the most favourable period for seed germination in cerrado, and the germination phenology was controlled by both the timing of seed dispersal and seed dormancy. Dormancy class was influenced by dispersal syndrome and season. Moreover, dormancy avoided seed germination during the rainy-to-dry transition, independently of dispersal syndrome. The variability of dormancy classes with dispersal syndrome allowed animal-dispersed species to fruit all year round, but seeds germinated only during the rainy season. Conversely, seasonally restricted wind-dispersal species dispersed and germinated their non-dormant seeds only in the rainy season.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)São Paulo State University (UNESP) Institute of Biosciences Department of Botany Phenology Lab, Av24A, 1515Departamento de Botânica Universidade Federal de Minas GeraisSão Paulo State University (UNESP) Institute of Biosciences Department of Botany Phenology Lab, Av24A, 1515FAPESP: 2014/21430-6Universidade Estadual Paulista (Unesp)Universidade Federal de Minas Gerais (UFMG)Escobar, Diego F.E [UNESP]Silveira, Fernando A.OMorellato, Leonor Patricia C [UNESP]2018-12-11T17:37:03Z2018-12-11T17:37:03Z2018-05-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1197-1209application/pdfhttp://dx.doi.org/10.1093/aob/mcy006Annals of Botany, v. 121, n. 6, p. 1197-1209, 2018.1095-82900305-7364http://hdl.handle.net/11449/17986110.1093/aob/mcy0062-s2.0-850470003452-s2.0-85047000345.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnnals of Botany1,7211,721info:eu-repo/semantics/openAccess2023-12-25T06:24:14Zoai:repositorio.unesp.br:11449/179861Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:17:01.540056Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
title Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
spellingShingle Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
Escobar, Diego F.E [UNESP]
Cerrado
dispersal syndromes
dormancy classes
fruiting phenology
germination phenology
neotropical savanna
title_short Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
title_full Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
title_fullStr Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
title_full_unstemmed Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
title_sort Timing of seed dispersal and seed dormancy in Brazilian savanna: Two solutions to face seasonality
author Escobar, Diego F.E [UNESP]
author_facet Escobar, Diego F.E [UNESP]
Silveira, Fernando A.O
Morellato, Leonor Patricia C [UNESP]
author_role author
author2 Silveira, Fernando A.O
Morellato, Leonor Patricia C [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de Minas Gerais (UFMG)
dc.contributor.author.fl_str_mv Escobar, Diego F.E [UNESP]
Silveira, Fernando A.O
Morellato, Leonor Patricia C [UNESP]
dc.subject.por.fl_str_mv Cerrado
dispersal syndromes
dormancy classes
fruiting phenology
germination phenology
neotropical savanna
topic Cerrado
dispersal syndromes
dormancy classes
fruiting phenology
germination phenology
neotropical savanna
description Background and Aims The relationship between fruiting phenology and seed dispersal syndrome is widely recognized; however, the interaction of dormancy classes and plant life-history traits in relation to fruiting phenology and seed dispersal is understudied. Here we examined the relationship between fruiting season and seed dormancy and how this relationship is modulated by dormancy classes, dispersal syndromes, seed mass and seed moisture content in a Brazilian savanna (cerrado). Methods Dormancy classes (non-dormancy and physical, morphological, morphophysiological, physiological and physiophysical dormancy) of 34 cerrado species were experimentally determined. Their seed dispersal syndrome (autochory, anemochory, zoochory), dispersal season (rainy, dry, rainy-to-dry and dry-to-rainy transitions), seed mass and moisture contents, and the estimated germination date were also determined. Log-linear models were used to evaluate how dormancy and dormancy classes are related to dispersal season and syndrome. Key Results The proportions of dormant and non-dormant species were similar in cerrado. The communityestimated germination date was seasonal, occurring at the onset of rainy season. Overall, anemochorous nondormant species released seeds during the dry-to-rainy transition; autochorous physically dormant species dispersed seeds during the dry season and rainy-to-dry transition; zoochorous species dispersed non-dormant seeds during the dry and rainy seasons, while species with morphological, morphophysiological or physiological dormancy dispersed seeds in the transitional seasons. Seed mass differed among dispersal seasons and dormancy classes, but seed moisture content did not vary with dispersal syndrome, season or dormancy class. Conclusions The beginning of the rainy season was the most favourable period for seed germination in cerrado, and the germination phenology was controlled by both the timing of seed dispersal and seed dormancy. Dormancy class was influenced by dispersal syndrome and season. Moreover, dormancy avoided seed germination during the rainy-to-dry transition, independently of dispersal syndrome. The variability of dormancy classes with dispersal syndrome allowed animal-dispersed species to fruit all year round, but seeds germinated only during the rainy season. Conversely, seasonally restricted wind-dispersal species dispersed and germinated their non-dormant seeds only in the rainy season.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-11T17:37:03Z
2018-12-11T17:37:03Z
2018-05-11
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/10.1093/aob/mcy006
Annals of Botany, v. 121, n. 6, p. 1197-1209, 2018.
1095-8290
0305-7364
http://hdl.handle.net/11449/179861
10.1093/aob/mcy006
2-s2.0-85047000345
2-s2.0-85047000345.pdf
url http://dx.doi.org/10.1093/aob/mcy006
http://hdl.handle.net/11449/179861
identifier_str_mv Annals of Botany, v. 121, n. 6, p. 1197-1209, 2018.
1095-8290
0305-7364
10.1093/aob/mcy006
2-s2.0-85047000345
2-s2.0-85047000345.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Annals of Botany
1,721
1,721
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1197-1209
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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