Adhesive secretion in Schizolobium parahyba (Vell.) Blake (Leguminosae: Caesalpinioideae): histochemical and morpho-functional characterization of this unusual feature in woody plants

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dc.contributor.authorPaiva, Elder Antônio Sousa
dc.contributor.authorOliveira, Denise Maria Trombert
dc.contributor.authorCanaveze, Yve
dc.contributor.authorMachado, Silvia Rodrigues [UNESP]
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T08:38:44Z
dc.date.available2022-04-29T08:38:44Z
dc.date.issued2022-01-01
dc.description.abstractThe legume tree Schizolobium parahyba from the Brazilian Atlantic Forest shows young aerial organs covered with a sticky exudate. Aiming to clarify the functional aspects of the sticky secretions, we performed analyses on the dynamics of secretion through the plant development and characterized the chemical nature of the exudates by histochemical tests. We also studied the secretory tissue using light and electron microscopy. The production of the exudates starts soon after seed germination, being evident in the epicotyl but not in the hypocotyl and cotyledons. The secretory activity extends throughout the juvenile and pre-reproductive phase, in primary stems and leaf portions. After the first flowering, secretion was no longer observed. The lipid exudates are secreted by the epidermis and are composed of mixtures of essential oils and oleoresins. Modified plastids, extensive rough endoplasmic reticulum, proliferated smooth endoplasmic reticulum, enlarged vacuoles containing flocculant materials, membrane debris, and convoluted tubules/lamellae membranes covered with osmiophilic deposits are the main features of the secretory epidermal cells. Secretion exits the protoplast by exocytosis and accumulates in the cuticle, resulting in a sheath of concentric bands of electron-dense deposits, and is released by cuticle peeling. The hydrophobic nature of the secretion, which forms an impermeable layer on the epidermis of young organs, is a relevant attribute of the aerial organs of S. parahyba. In addition to protecting against desiccation, this exudate effectively captures particles and immobilizes insects and other arthropods.en
dc.description.affiliationDepartamento de Botânica Instituto de Ciências Biológicas Universidade Federal de Minas Gerais, Minas Gerais
dc.description.affiliationDepartamento de Botânica Instituto de Biologia Universidade Federal do Rio de Janeiro
dc.description.affiliationInstituto de Biociências de Botucatu Centro de Microscopia Eletrônica Botucatu Universidade Estadual Paulista
dc.description.affiliationUnespInstituto de Biociências de Botucatu Centro de Microscopia Eletrônica Botucatu Universidade Estadual Paulista
dc.identifierhttp://dx.doi.org/10.1007/s11829-022-09888-y
dc.identifier.citationArthropod-Plant Interactions.
dc.identifier.doi10.1007/s11829-022-09888-y
dc.identifier.issn1872-8847
dc.identifier.issn1872-8855
dc.identifier.scopus2-s2.0-85123223917
dc.identifier.urihttp://hdl.handle.net/11449/230256
dc.language.isoeng
dc.relation.ispartofArthropod-Plant Interactions
dc.sourceScopus
dc.subjectProtection attribute
dc.subjectSchizolobium parahyba
dc.subjectSecretory epidermis
dc.subjectSticky exudate
dc.subjectUltrastructure
dc.titleAdhesive secretion in Schizolobium parahyba (Vell.) Blake (Leguminosae: Caesalpinioideae): histochemical and morpho-functional characterization of this unusual feature in woody plantsen
dc.typeArtigo
unesp.author.orcid0000-0003-3137-8551[4]

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Botucatu - CME - Centro de Microscopia Eletrônica