Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Botanica Brasilica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021000800445 |
Resumo: | ABSTRACT Calolisianthus speciosus, an endemic species of cerrado and campos rupestres in Brazil, bears colleters in both the leaf base and sepal. These colleters (leaf and sepal) were anatomically compared to identify differences in their structure and secretion mechanism. Samples of sepals and leaves in different development stages were collected and processed according to standard methodologies for anatomical and ultrastructural studies. Sepal and leaf colleters were anatomically similar, being non-vascularized, sessile or short-stalked and composed of a multicellular secretory head with large intercellular spaces where secretion, with a predominance of protein and polysaccharides, is accumulated. The secretory cells have thin walls, dense cytoplasm with granular endoplasmic reticulum, numerous dictyosomes and mitochondria. The ultrastructural characters are in agreement with the production of mucilaginous/protein secretion. The large secretion-filled vacuole merges with the plasma membrane releasing its contents to the periplasmic space where it remains until release outside of the cell wall, where it is accumulated in intercellular spaces formed by schizogeny. This accumulation generates pressure that promotes the passage of secretion through the external wall and the cuticle of superficial secretory cells of the head of the colleter. |
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Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudationhistochemistrymucilageprotein contentsecretory structuresultrastructural analysisABSTRACT Calolisianthus speciosus, an endemic species of cerrado and campos rupestres in Brazil, bears colleters in both the leaf base and sepal. These colleters (leaf and sepal) were anatomically compared to identify differences in their structure and secretion mechanism. Samples of sepals and leaves in different development stages were collected and processed according to standard methodologies for anatomical and ultrastructural studies. Sepal and leaf colleters were anatomically similar, being non-vascularized, sessile or short-stalked and composed of a multicellular secretory head with large intercellular spaces where secretion, with a predominance of protein and polysaccharides, is accumulated. The secretory cells have thin walls, dense cytoplasm with granular endoplasmic reticulum, numerous dictyosomes and mitochondria. The ultrastructural characters are in agreement with the production of mucilaginous/protein secretion. The large secretion-filled vacuole merges with the plasma membrane releasing its contents to the periplasmic space where it remains until release outside of the cell wall, where it is accumulated in intercellular spaces formed by schizogeny. This accumulation generates pressure that promotes the passage of secretion through the external wall and the cuticle of superficial secretory cells of the head of the colleter.Sociedade Botânica do Brasil2021-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021000800445Acta Botanica Brasilica v.35 n.3 2021reponame:Acta Botanica Brasilicainstname:Sociedade Botânica do Brasil (SBB)instacron:SBB10.1590/0102-33062020abb0424info:eu-repo/semantics/openAccessZanotti,AnaluFernandes,Valéria FerreiraAzevedo,Aristéa AlvesMeira,Renata Maria Strozi Alveseng2021-11-09T00:00:00Zoai:scielo:S0102-33062021000800445Revistahttps://www.scielo.br/j/abb/ONGhttps://old.scielo.br/oai/scielo-oai.phpacta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com1677-941X0102-3306opendoar:2021-11-09T00:00Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)false |
dc.title.none.fl_str_mv |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
title |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
spellingShingle |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation Zanotti,Analu histochemistry mucilage protein content secretory structures ultrastructural analysis |
title_short |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
title_full |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
title_fullStr |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
title_full_unstemmed |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
title_sort |
Leaf and sepal colleters in Calolisianthus speciosus Gilg (Gentianaceae): a morphoanatomical comparative analysis and mechanisms of exudation |
author |
Zanotti,Analu |
author_facet |
Zanotti,Analu Fernandes,Valéria Ferreira Azevedo,Aristéa Alves Meira,Renata Maria Strozi Alves |
author_role |
author |
author2 |
Fernandes,Valéria Ferreira Azevedo,Aristéa Alves Meira,Renata Maria Strozi Alves |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Zanotti,Analu Fernandes,Valéria Ferreira Azevedo,Aristéa Alves Meira,Renata Maria Strozi Alves |
dc.subject.por.fl_str_mv |
histochemistry mucilage protein content secretory structures ultrastructural analysis |
topic |
histochemistry mucilage protein content secretory structures ultrastructural analysis |
description |
ABSTRACT Calolisianthus speciosus, an endemic species of cerrado and campos rupestres in Brazil, bears colleters in both the leaf base and sepal. These colleters (leaf and sepal) were anatomically compared to identify differences in their structure and secretion mechanism. Samples of sepals and leaves in different development stages were collected and processed according to standard methodologies for anatomical and ultrastructural studies. Sepal and leaf colleters were anatomically similar, being non-vascularized, sessile or short-stalked and composed of a multicellular secretory head with large intercellular spaces where secretion, with a predominance of protein and polysaccharides, is accumulated. The secretory cells have thin walls, dense cytoplasm with granular endoplasmic reticulum, numerous dictyosomes and mitochondria. The ultrastructural characters are in agreement with the production of mucilaginous/protein secretion. The large secretion-filled vacuole merges with the plasma membrane releasing its contents to the periplasmic space where it remains until release outside of the cell wall, where it is accumulated in intercellular spaces formed by schizogeny. This accumulation generates pressure that promotes the passage of secretion through the external wall and the cuticle of superficial secretory cells of the head of the colleter. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021000800445 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021000800445 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0102-33062020abb0424 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Botânica do Brasil |
publisher.none.fl_str_mv |
Sociedade Botânica do Brasil |
dc.source.none.fl_str_mv |
Acta Botanica Brasilica v.35 n.3 2021 reponame:Acta Botanica Brasilica instname:Sociedade Botânica do Brasil (SBB) instacron:SBB |
instname_str |
Sociedade Botânica do Brasil (SBB) |
instacron_str |
SBB |
institution |
SBB |
reponame_str |
Acta Botanica Brasilica |
collection |
Acta Botanica Brasilica |
repository.name.fl_str_mv |
Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB) |
repository.mail.fl_str_mv |
acta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com |
_version_ |
1752126664182071296 |