Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves

Detalhes bibliográficos
Autor(a) principal: Leandro, Thales D. [UNESP]
Data de Publicação: 2018
Outros Autores: Rodrigues, Tatiane Maria [UNESP], Clark, Lynn G., Scatena, Vera Lucia [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1093/aob/mcy025
http://hdl.handle.net/11449/189866
Resumo: Background and Aims In mature grass leaf blades as seen in cross-section, oblong cell-like structures have been interpreted most recently as intercellular gas spaces delimited by successive collapsed fusoid cells. These cells have been reported in at least seven of 12 subfamilies of Poaceae and are considered a synapomorphy for the family; however, no developmental work has been performed to verify their meristematic origin or to assess possible homologies within the graminid clade (= Flagellariaceae + [(Joinvilleaceae + Ecdeiocoleaceae) + Poaceae]) or among subfamilies of Poaceae. A developmental study was therefore carried out, including 20 species in three families (Flagellariaceae, Joinvilleaceae and Poaceae), representing the earlier-diverging and derived branches within the graminid clade and Poaceae. Methods Light microscopy was combined with scanning electron microscopy, cryoscanning electron microscopy and transmission electron microscopy to study the development of leaves taken from the shoot apex of young plants. Mature leaf blades also were taken from living or dried plants and the mid-portion was studied. Key Results Developmental results show that, in mature leaf blades as seen in cross-section, one apparent fusoid cell is typically a cavity resulting from the collapse of the initial fusoid cell and its internal divisions, which are herein interpreted as derivative cells with formation of cell plates only. Each cavity is delimited by successive collapsed fusoid cells arranged perpendicularly to the veins. Fusoid cells in all studied Poaceae members originate from the ground meristem, as do the colourless cells in Joinvillea ascendens (Joinvilleaceae). These two types of mesophyll cell have a strongly similar ontogeny, distinguished mainly by the collapse of the fusoid cells in Poaceae, which is not observed in the colourless cells in J. ascendens. Conclusions Within the Poaceae, the meristematic origin of fusoid cells is the same in the early-diverging lineages, BOP clade and Panicoideae, and thus they are homologous within the family. The same topography and meristematic origin suggest that fusoid cells in Poaceae and colourless cells in Joinvilleaceae are homologous. The results also suggest that the role played by the fusoid cells in young grass leaves is related to synthesis and storage of starch granules at early stages of development.
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spelling Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leavesBOP cladeearly-diverging grass lineagesFlagellariaceaefoliar anatomygraminid cladegrassesJoinvilleaceaemesophyll cellsontogenyPanicoideaeBackground and Aims In mature grass leaf blades as seen in cross-section, oblong cell-like structures have been interpreted most recently as intercellular gas spaces delimited by successive collapsed fusoid cells. These cells have been reported in at least seven of 12 subfamilies of Poaceae and are considered a synapomorphy for the family; however, no developmental work has been performed to verify their meristematic origin or to assess possible homologies within the graminid clade (= Flagellariaceae + [(Joinvilleaceae + Ecdeiocoleaceae) + Poaceae]) or among subfamilies of Poaceae. A developmental study was therefore carried out, including 20 species in three families (Flagellariaceae, Joinvilleaceae and Poaceae), representing the earlier-diverging and derived branches within the graminid clade and Poaceae. Methods Light microscopy was combined with scanning electron microscopy, cryoscanning electron microscopy and transmission electron microscopy to study the development of leaves taken from the shoot apex of young plants. Mature leaf blades also were taken from living or dried plants and the mid-portion was studied. Key Results Developmental results show that, in mature leaf blades as seen in cross-section, one apparent fusoid cell is typically a cavity resulting from the collapse of the initial fusoid cell and its internal divisions, which are herein interpreted as derivative cells with formation of cell plates only. Each cavity is delimited by successive collapsed fusoid cells arranged perpendicularly to the veins. Fusoid cells in all studied Poaceae members originate from the ground meristem, as do the colourless cells in Joinvillea ascendens (Joinvilleaceae). These two types of mesophyll cell have a strongly similar ontogeny, distinguished mainly by the collapse of the fusoid cells in Poaceae, which is not observed in the colourless cells in J. ascendens. Conclusions Within the Poaceae, the meristematic origin of fusoid cells is the same in the early-diverging lineages, BOP clade and Panicoideae, and thus they are homologous within the family. The same topography and meristematic origin suggest that fusoid cells in Poaceae and colourless cells in Joinvilleaceae are homologous. The results also suggest that the role played by the fusoid cells in young grass leaves is related to synthesis and storage of starch granules at early stages of development.Universidade Estadual Paulista-UNESP Departamento de BotânicaIowa State University-ISU Department of Ecology Evolution and Organismal BiologyUniversidade Estadual Paulista-UNESP Departamento de BotânicaUniversidade Estadual Paulista (Unesp)and Organismal BiologyLeandro, Thales D. [UNESP]Rodrigues, Tatiane Maria [UNESP]Clark, Lynn G.Scatena, Vera Lucia [UNESP]2019-10-06T16:54:44Z2019-10-06T16:54:44Z2018-11-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article833-848http://dx.doi.org/10.1093/aob/mcy025Annals of Botany, v. 122, n. 5, p. 833-848, 2018.1095-82900305-7364http://hdl.handle.net/11449/18986610.1093/aob/mcy0252-s2.0-85056255815Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnnals of Botanyinfo:eu-repo/semantics/openAccess2021-10-22T21:09:47Zoai:repositorio.unesp.br:11449/189866Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:50:12.356557Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
title Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
spellingShingle Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
Leandro, Thales D. [UNESP]
BOP clade
early-diverging grass lineages
Flagellariaceae
foliar anatomy
graminid clade
grasses
Joinvilleaceae
mesophyll cells
ontogeny
Panicoideae
title_short Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
title_full Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
title_fullStr Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
title_full_unstemmed Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
title_sort Fusoid cells in the grass family Poaceae (Poales): A developmental study reveals homologies and suggests new insights into their functional role in young leaves
author Leandro, Thales D. [UNESP]
author_facet Leandro, Thales D. [UNESP]
Rodrigues, Tatiane Maria [UNESP]
Clark, Lynn G.
Scatena, Vera Lucia [UNESP]
author_role author
author2 Rodrigues, Tatiane Maria [UNESP]
Clark, Lynn G.
Scatena, Vera Lucia [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
and Organismal Biology
dc.contributor.author.fl_str_mv Leandro, Thales D. [UNESP]
Rodrigues, Tatiane Maria [UNESP]
Clark, Lynn G.
Scatena, Vera Lucia [UNESP]
dc.subject.por.fl_str_mv BOP clade
early-diverging grass lineages
Flagellariaceae
foliar anatomy
graminid clade
grasses
Joinvilleaceae
mesophyll cells
ontogeny
Panicoideae
topic BOP clade
early-diverging grass lineages
Flagellariaceae
foliar anatomy
graminid clade
grasses
Joinvilleaceae
mesophyll cells
ontogeny
Panicoideae
description Background and Aims In mature grass leaf blades as seen in cross-section, oblong cell-like structures have been interpreted most recently as intercellular gas spaces delimited by successive collapsed fusoid cells. These cells have been reported in at least seven of 12 subfamilies of Poaceae and are considered a synapomorphy for the family; however, no developmental work has been performed to verify their meristematic origin or to assess possible homologies within the graminid clade (= Flagellariaceae + [(Joinvilleaceae + Ecdeiocoleaceae) + Poaceae]) or among subfamilies of Poaceae. A developmental study was therefore carried out, including 20 species in three families (Flagellariaceae, Joinvilleaceae and Poaceae), representing the earlier-diverging and derived branches within the graminid clade and Poaceae. Methods Light microscopy was combined with scanning electron microscopy, cryoscanning electron microscopy and transmission electron microscopy to study the development of leaves taken from the shoot apex of young plants. Mature leaf blades also were taken from living or dried plants and the mid-portion was studied. Key Results Developmental results show that, in mature leaf blades as seen in cross-section, one apparent fusoid cell is typically a cavity resulting from the collapse of the initial fusoid cell and its internal divisions, which are herein interpreted as derivative cells with formation of cell plates only. Each cavity is delimited by successive collapsed fusoid cells arranged perpendicularly to the veins. Fusoid cells in all studied Poaceae members originate from the ground meristem, as do the colourless cells in Joinvillea ascendens (Joinvilleaceae). These two types of mesophyll cell have a strongly similar ontogeny, distinguished mainly by the collapse of the fusoid cells in Poaceae, which is not observed in the colourless cells in J. ascendens. Conclusions Within the Poaceae, the meristematic origin of fusoid cells is the same in the early-diverging lineages, BOP clade and Panicoideae, and thus they are homologous within the family. The same topography and meristematic origin suggest that fusoid cells in Poaceae and colourless cells in Joinvilleaceae are homologous. The results also suggest that the role played by the fusoid cells in young grass leaves is related to synthesis and storage of starch granules at early stages of development.
publishDate 2018
dc.date.none.fl_str_mv 2018-11-03
2019-10-06T16:54:44Z
2019-10-06T16:54:44Z
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/mcy025
Annals of Botany, v. 122, n. 5, p. 833-848, 2018.
1095-8290
0305-7364
http://hdl.handle.net/11449/189866
10.1093/aob/mcy025
2-s2.0-85056255815
url http://dx.doi.org/10.1093/aob/mcy025
http://hdl.handle.net/11449/189866
identifier_str_mv Annals of Botany, v. 122, n. 5, p. 833-848, 2018.
1095-8290
0305-7364
10.1093/aob/mcy025
2-s2.0-85056255815
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Annals of Botany
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 833-848
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)
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