Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids

Detalhes bibliográficos
Autor(a) principal: Monteiro, Mariana Maciel
Data de Publicação: 2020
Outros Autores: Demarco, Diego, Oriani, Aline [UNESP], Prychid, Chrissie, Prenner, Gerhard
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s00606-020-01720-5
http://hdl.handle.net/11449/205471
Resumo: Mapanioideae (besides Cyperoideae the other subfamily of Cyperaceae) is divided in two tribes (Hypolytreae and Chrysitricheae) in which the reproductive units (spicoids) are interpreted either as flowers or as inflorescences. Little is known about the ontogenetic factors operating during the spicoid development and how they may contribute to the spicoid final morphology. In this context, we studied the spicoid development in the monotypic genus Diplasia and compared it with other developmental studies in Mapanioideae. Our results show that the main developmental variations are related to the sequence of organ formation, the size and shape of the spicoid primordium and the influence of the subtending bract constraints in different sides of such primordium. Our hypotheses to explain the spicoid’s morphological variation in Mapanioideae are: that size and shape of the spicoid primordium contribute to changes in the number and position of organs to be formed, and spatial constraints of the subtending bracts influence the reduction of adaxial parts. Developmental features of the spicoids showed to be stable within the tribe. Our observations of the nature of spicoids in Diplasia give arguments for both, floral and inflorescence interpretations, sustaining the uncertainty towards a satisfactory definition. The difficulty in distinguishing the boundaries of flower and inflorescence nature in the spicoids raised a third hypothesis where the spicoid could be interpreted as a de novo structure, due to a reorganisation of regulatory genes resulting in a single unit with flower and inflorescence features combined, considered a synapomorphy of Mapanioideae.
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spelling Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoidsDiplasia karatifoliaMapaniidMapanioideaePseudanthiumSpatial constraintsSpicoidMapanioideae (besides Cyperoideae the other subfamily of Cyperaceae) is divided in two tribes (Hypolytreae and Chrysitricheae) in which the reproductive units (spicoids) are interpreted either as flowers or as inflorescences. Little is known about the ontogenetic factors operating during the spicoid development and how they may contribute to the spicoid final morphology. In this context, we studied the spicoid development in the monotypic genus Diplasia and compared it with other developmental studies in Mapanioideae. Our results show that the main developmental variations are related to the sequence of organ formation, the size and shape of the spicoid primordium and the influence of the subtending bract constraints in different sides of such primordium. Our hypotheses to explain the spicoid’s morphological variation in Mapanioideae are: that size and shape of the spicoid primordium contribute to changes in the number and position of organs to be formed, and spatial constraints of the subtending bracts influence the reduction of adaxial parts. Developmental features of the spicoids showed to be stable within the tribe. Our observations of the nature of spicoids in Diplasia give arguments for both, floral and inflorescence interpretations, sustaining the uncertainty towards a satisfactory definition. The difficulty in distinguishing the boundaries of flower and inflorescence nature in the spicoids raised a third hypothesis where the spicoid could be interpreted as a de novo structure, due to a reorganisation of regulatory genes resulting in a single unit with flower and inflorescence features combined, considered a synapomorphy of Mapanioideae.Departamento de Botânica Instituto de Biociências Universidade de São PauloDepartamento de Botânica Instituto de Biociências Universidade Estadual Paulista (UNESP), Caixa Postal 199Jodrell Laboratory Royal Botanic GardensDepartamento de Botânica Instituto de Biociências Universidade Estadual Paulista (UNESP), Caixa Postal 199Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Royal Botanic GardensMonteiro, Mariana MacielDemarco, DiegoOriani, Aline [UNESP]Prychid, ChrissiePrenner, Gerhard2021-06-25T10:15:52Z2021-06-25T10:15:52Z2020-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s00606-020-01720-5Plant Systematics and Evolution, v. 306, n. 6, 2020.1615-61100378-2697http://hdl.handle.net/11449/20547110.1007/s00606-020-01720-52-s2.0-85096092352Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPlant Systematics and Evolutioninfo:eu-repo/semantics/openAccess2021-10-23T14:34:00Zoai:repositorio.unesp.br:11449/205471Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:44:07.124293Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
title Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
spellingShingle Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
Monteiro, Mariana Maciel
Diplasia karatifolia
Mapaniid
Mapanioideae
Pseudanthium
Spatial constraints
Spicoid
title_short Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
title_full Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
title_fullStr Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
title_full_unstemmed Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
title_sort Spicoid ontogeny in Diplasia (Mapanioideae, Cyperaceae): an approach on the developmental processes operating in Mapanioideae spicoids
author Monteiro, Mariana Maciel
author_facet Monteiro, Mariana Maciel
Demarco, Diego
Oriani, Aline [UNESP]
Prychid, Chrissie
Prenner, Gerhard
author_role author
author2 Demarco, Diego
Oriani, Aline [UNESP]
Prychid, Chrissie
Prenner, Gerhard
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Royal Botanic Gardens
dc.contributor.author.fl_str_mv Monteiro, Mariana Maciel
Demarco, Diego
Oriani, Aline [UNESP]
Prychid, Chrissie
Prenner, Gerhard
dc.subject.por.fl_str_mv Diplasia karatifolia
Mapaniid
Mapanioideae
Pseudanthium
Spatial constraints
Spicoid
topic Diplasia karatifolia
Mapaniid
Mapanioideae
Pseudanthium
Spatial constraints
Spicoid
description Mapanioideae (besides Cyperoideae the other subfamily of Cyperaceae) is divided in two tribes (Hypolytreae and Chrysitricheae) in which the reproductive units (spicoids) are interpreted either as flowers or as inflorescences. Little is known about the ontogenetic factors operating during the spicoid development and how they may contribute to the spicoid final morphology. In this context, we studied the spicoid development in the monotypic genus Diplasia and compared it with other developmental studies in Mapanioideae. Our results show that the main developmental variations are related to the sequence of organ formation, the size and shape of the spicoid primordium and the influence of the subtending bract constraints in different sides of such primordium. Our hypotheses to explain the spicoid’s morphological variation in Mapanioideae are: that size and shape of the spicoid primordium contribute to changes in the number and position of organs to be formed, and spatial constraints of the subtending bracts influence the reduction of adaxial parts. Developmental features of the spicoids showed to be stable within the tribe. Our observations of the nature of spicoids in Diplasia give arguments for both, floral and inflorescence interpretations, sustaining the uncertainty towards a satisfactory definition. The difficulty in distinguishing the boundaries of flower and inflorescence nature in the spicoids raised a third hypothesis where the spicoid could be interpreted as a de novo structure, due to a reorganisation of regulatory genes resulting in a single unit with flower and inflorescence features combined, considered a synapomorphy of Mapanioideae.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-01
2021-06-25T10:15:52Z
2021-06-25T10:15:52Z
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/10.1007/s00606-020-01720-5
Plant Systematics and Evolution, v. 306, n. 6, 2020.
1615-6110
0378-2697
http://hdl.handle.net/11449/205471
10.1007/s00606-020-01720-5
2-s2.0-85096092352
url http://dx.doi.org/10.1007/s00606-020-01720-5
http://hdl.handle.net/11449/205471
identifier_str_mv Plant Systematics and Evolution, v. 306, n. 6, 2020.
1615-6110
0378-2697
10.1007/s00606-020-01720-5
2-s2.0-85096092352
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Plant Systematics and Evolution
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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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