Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s00709-019-01421-y http://hdl.handle.net/11449/195182 |
Resumo: | The chemical composition of the cell walls strongly affects water permeability and storage in root tissues. Since epiphytic orchids live in a habitat with a highly fluctuating water supply, the root cell walls are functionally important. In the present study, we used histochemistry and immunocytochemistry techniques in order to determine the composition of the cell walls of root tissues of 18 epiphytic species belonging to seven subtribes across the Orchidaceae. The impregnation of lignin in the velamen cells reinforces its function as mechanical support and can facilitate apoplastic flow. Pectins, as well cellulose and lignins, are also essential for the stability and mechanical support of velamen cells. The exodermis and endodermis possess a suberinized lamella and often lignified walls that function as selective barriers to apoplastic flow. Various cortical parenchyma secondary wall thickenings, including phi, reticulated, and uniform, prevent the cortex from collapsing during periods of desiccation. The presence of highly methyl-esterified pectins in the cortical parenchyma facilitates the formation of gels, causing wall loosening and increased porosity, which contributes to water storage and solute transport between cells. Finally, cells with lipid or lignin impregnation in the cortical parenchyma could increase the water flow towards the stele. |
id |
UNSP_3c5fb4a83aae2ef6ebffbfda8260a77c |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/195182 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Chemical composition of cell walls in velamentous roots of epiphytic OrchidaceaeAerial rootsEpiphytic orchidsLigninPectinsVelamenWater absorptionThe chemical composition of the cell walls strongly affects water permeability and storage in root tissues. Since epiphytic orchids live in a habitat with a highly fluctuating water supply, the root cell walls are functionally important. In the present study, we used histochemistry and immunocytochemistry techniques in order to determine the composition of the cell walls of root tissues of 18 epiphytic species belonging to seven subtribes across the Orchidaceae. The impregnation of lignin in the velamen cells reinforces its function as mechanical support and can facilitate apoplastic flow. Pectins, as well cellulose and lignins, are also essential for the stability and mechanical support of velamen cells. The exodermis and endodermis possess a suberinized lamella and often lignified walls that function as selective barriers to apoplastic flow. Various cortical parenchyma secondary wall thickenings, including phi, reticulated, and uniform, prevent the cortex from collapsing during periods of desiccation. The presence of highly methyl-esterified pectins in the cortical parenchyma facilitates the formation of gels, causing wall loosening and increased porosity, which contributes to water storage and solute transport between cells. Finally, cells with lipid or lignin impregnation in the cortical parenchyma could increase the water flow towards the stele.Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Deutsche Forschungsgemeinschaft (DFG)Univ Estadual Paulista, Inst Biociencias, Sao Paulo, BrazilUniv Fed Uberlandia, Inst Biol, Uberlandia, MG, BrazilCarl von Ossietzky Univ Oldenburg, Inst Biol & Environm Sci, Oldenburg, GermanyUniv Estadual Paulista, Inst Biociencias, Sao Paulo, BrazilDeutsche Forschungsgemeinschaft (DFG): ZO 94/7-1SpringerUniversidade Estadual Paulista (Unesp)Universidade Federal de Uberlândia (UFU)Carl von Ossietzky Univ OldenburgJoca, Thais Arruda Costa [UNESP]Oliveira, Denis Coelho deZotz, GerhardCardoso, Joao Custodio FernandesMoreira, Ana Silvia Franco Pinheiro2020-12-10T17:07:15Z2020-12-10T17:07:15Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article103-118http://dx.doi.org/10.1007/s00709-019-01421-yProtoplasma. Wien: Springer Wien, v. 257, n. 1, p. 103-118, 2020.0033-183Xhttp://hdl.handle.net/11449/19518210.1007/s00709-019-01421-yWOS:000511940500009Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProtoplasmainfo:eu-repo/semantics/openAccess2021-10-22T21:03:09Zoai:repositorio.unesp.br:11449/195182Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:12:02.648221Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
title |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
spellingShingle |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae Joca, Thais Arruda Costa [UNESP] Aerial roots Epiphytic orchids Lignin Pectins Velamen Water absorption |
title_short |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
title_full |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
title_fullStr |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
title_full_unstemmed |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
title_sort |
Chemical composition of cell walls in velamentous roots of epiphytic Orchidaceae |
author |
Joca, Thais Arruda Costa [UNESP] |
author_facet |
Joca, Thais Arruda Costa [UNESP] Oliveira, Denis Coelho de Zotz, Gerhard Cardoso, Joao Custodio Fernandes Moreira, Ana Silvia Franco Pinheiro |
author_role |
author |
author2 |
Oliveira, Denis Coelho de Zotz, Gerhard Cardoso, Joao Custodio Fernandes Moreira, Ana Silvia Franco Pinheiro |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Uberlândia (UFU) Carl von Ossietzky Univ Oldenburg |
dc.contributor.author.fl_str_mv |
Joca, Thais Arruda Costa [UNESP] Oliveira, Denis Coelho de Zotz, Gerhard Cardoso, Joao Custodio Fernandes Moreira, Ana Silvia Franco Pinheiro |
dc.subject.por.fl_str_mv |
Aerial roots Epiphytic orchids Lignin Pectins Velamen Water absorption |
topic |
Aerial roots Epiphytic orchids Lignin Pectins Velamen Water absorption |
description |
The chemical composition of the cell walls strongly affects water permeability and storage in root tissues. Since epiphytic orchids live in a habitat with a highly fluctuating water supply, the root cell walls are functionally important. In the present study, we used histochemistry and immunocytochemistry techniques in order to determine the composition of the cell walls of root tissues of 18 epiphytic species belonging to seven subtribes across the Orchidaceae. The impregnation of lignin in the velamen cells reinforces its function as mechanical support and can facilitate apoplastic flow. Pectins, as well cellulose and lignins, are also essential for the stability and mechanical support of velamen cells. The exodermis and endodermis possess a suberinized lamella and often lignified walls that function as selective barriers to apoplastic flow. Various cortical parenchyma secondary wall thickenings, including phi, reticulated, and uniform, prevent the cortex from collapsing during periods of desiccation. The presence of highly methyl-esterified pectins in the cortical parenchyma facilitates the formation of gels, causing wall loosening and increased porosity, which contributes to water storage and solute transport between cells. Finally, cells with lipid or lignin impregnation in the cortical parenchyma could increase the water flow towards the stele. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T17:07:15Z 2020-12-10T17:07:15Z 2020-01-01 |
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/10.1007/s00709-019-01421-y Protoplasma. Wien: Springer Wien, v. 257, n. 1, p. 103-118, 2020. 0033-183X http://hdl.handle.net/11449/195182 10.1007/s00709-019-01421-y WOS:000511940500009 |
url |
http://dx.doi.org/10.1007/s00709-019-01421-y http://hdl.handle.net/11449/195182 |
identifier_str_mv |
Protoplasma. Wien: Springer Wien, v. 257, n. 1, p. 103-118, 2020. 0033-183X 10.1007/s00709-019-01421-y WOS:000511940500009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Protoplasma |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
103-118 |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
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 |
|
_version_ |
1808128617295642624 |