| Registro completo |
| Provedor de dados: |
Acta Botanica
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| País: |
Brazil
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| Título: |
Outer cell wall structure and the secretion mechanism of colleters of Bathysa nicholsonii K. Schum. (Rubiaceae)
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| Autores: |
Miguel,Emilio de Castro
Pireda,Saulo
Barros,Claudia Franca
Zottich,Umberto
Gomes,Valdirene Moreira
Miguens,Flavio Costa
Cunha,Maura Da
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| Data: |
2017-09-01
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| Ano: |
2017
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| Palavras-chave: |
Colleters
Outer cell wall
Rubiaceae
Secretion accumulation site
Secretion mechanism
Secretory structures
Secretory tissues
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| Resumo: |
ABSTRACT Secretory structures are formed by many types of plants and are present on numerous different organs. Among the many types of known secretory structures, colleters are predominant on plants of the Rubiaceae. One remarkable characteristic of secretory tissues is the export of exudates; however, the precise mechanism involved in this process is still unclear. To better understand the mechanisms of exudate externalization it is necessary to understand the ultrastructure and dynamics of the outer cell wall of the secretory structures during the secretory process, and so we investigated these aspects of the colleters of Bathysa nicholsonii. The outer cell wall (OCW) exhibits multiple layers: a basal polysaccharide rich layer; a cuticular membrane, which is subdivided into arborescent and reticulated layers; and a thin cuticle proper. The structural organization of the OCW is changed during secretion passage, which is mainly related to the development of a secretion accumulation site on the polysaccharide rich layer. Secretion dynamics is driven by the organization and disruption of the secretion accumulation site. The results show that the OCW of the colleters of B. nicholsonii is a dynamic structure with an active role in secretion externalization via constant structural reorganization directly related to secretion passage.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300411
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| Editor: |
Sociedade Botânica do Brasil
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| Relação: |
10.1590/0102-33062016abb0420
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| Formato: |
text/html
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| Fonte: |
Acta Botanica Brasilica v.31 n.3 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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