Spatial distribution of structural elements in leaves of Ilex paraguariensis: physiological and ecological implications

dc.contributor.authorBarbosa, Julierme Zimmer
dc.contributor.authorMotta, Antonio Carlos Vargas
dc.contributor.authordos Reis, André Rodrigues [UNESP]
dc.contributor.authorCorrêa, Rodrigo Studart
dc.contributor.authorPrior, Stephen A.
dc.contributor.institutionIngá University Center (Uningá)
dc.contributor.institutionUniversidade Federal do Paraná (UFPR)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionPPGCA/FUP
dc.contributor.institutionUnited States Department of Agriculture-Agricultural Research Service
dc.date.accessioned2019-10-06T15:53:28Z
dc.date.available2019-10-06T15:53:28Z
dc.date.issued2019-01-01
dc.description.abstractKey message: Calcium accumulation in crystals (mainly in the midrib) and silicon on the external surface of the upper epidermis suggests physiological and/or ecological roles. Abstract: Concentration, form, and location of elements in leaf tissue of Ilex paraguariensis A. St.-Hil. can influence remobilization patterns and release of substances during its infusion for making yerba mate beverages. Even though, spatial distribution of elements and characterization of crystal formation in I. paraguariensis has not been elucidated. For filling this gap, this study used microanalytical techniques to evaluate accumulation and spatial distribution of elements in yerba mate leaves, which was done using chemical analyses and scanning electron microscopy combined with energy-dispersive spectroscopy (SEM–EDS). Chemical analyses confirmed high concentrations of potassium (K) and manganese (Mn) in leaves. Cell walls were predominantly composed of carbon (C) and oxygen (O). Compartmentalization of silicon (Si) occurred on the external surface of the upper epidermis between cell walls and the leaf cuticle. Precipitation of calcium (Ca) was higher in the midrib than in the leaf blade with the mesophyll and palisade mesophyll being the main accumulation sites. Microscopy–spectroscopy analysis revealed different patterns of elemental accumulation in leaves, which suggests physiological and/or ecological roles in yerba mate plants. Additionally, the abundance of Ca oxalates could explain the low Ca solubility during the beverage infusion process.en
dc.description.affiliationDepartment of Agronomy Ingá University Center (Uningá), Highway PR 317, 6114-Industrial Park 200
dc.description.affiliationDepartment of Soils and Agricultural Engineering Federal University of Paraná (UFPR)
dc.description.affiliationBiosystems Engineering São Paulo State University (UNESP)
dc.description.affiliationUniversity of Brasília PPGCA/FUP
dc.description.affiliationNational Soil Dynamics Laboratory United States Department of Agriculture-Agricultural Research Service
dc.description.affiliationUnespBiosystems Engineering São Paulo State University (UNESP)
dc.identifierhttp://dx.doi.org/10.1007/s00468-019-01900-y
dc.identifier.citationTrees - Structure and Function.
dc.identifier.doi10.1007/s00468-019-01900-y
dc.identifier.issn0931-1890
dc.identifier.scopus2-s2.0-85070985440
dc.identifier.urihttp://hdl.handle.net/11449/187988
dc.language.isoeng
dc.relation.ispartofTrees - Structure and Function
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAmorphous silica
dc.subjectCalcium regulation
dc.subjectElemental accumulation
dc.subjectHerbal tea
dc.subjectSouth American flora
dc.subjectX-ray microanalysis
dc.titleSpatial distribution of structural elements in leaves of Ilex paraguariensis: physiological and ecological implicationsen
dc.typeArtigo
unesp.author.lattes3951143759106367[3]
unesp.author.orcid0000-0002-1784-4985[1]
unesp.author.orcid0000-0002-6527-2520[3]

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