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Título

Scanning electron microscopy coupled with energy dispersive spectrometric analysis reveals for the first time weddellite and sylvite crystals on the surface of involucral bracts and petals of two Xeranthemum L. (Compositae) species

AutorGavrilović, Milan; Erić, Suzana; Marin, Petar D.; Garcia-Jacas, Núria ; Janaćković, Pedja; Susanna de la Serna, Alfonso
Palabras claveSEM-EDS
Weddellite and sylvite crystals
Xeranthemum
Cardueae
Involucral bracts and petals
Fecha de publicación26-may-2017
EditorMicroscopy Society of America
Cambridge University Press
CitaciónMicroscopy and Microanalysis 23(3): 679-686 (2017)
ResumenIn this work, weddellite and sylvite crystals are identified for the first time on the involucral bracts and petals of Xeranthemum annuum and Xeranthemum cylindraceum using scanning electron microscopy coupled with energy dispersive spectrometric (SEM-EDS) analysis. Well-developed crystals of weddellite (CaC2O4·2H2O) occur in the form of a tetragonal bipyramid (hhl), rarely in combination of a bipyramid and tetragonal prism (h00). Indumentum of involucral bracts of X. cylindraceum consists of nonglandular and glandular trichomes. Sylvite (KCl) crystals are observed only on the petal surface of X. cylindraceum. The crystals of sylvite occur in the form of perfect cubes (hexahedrons), but some crystals are deformed, i.e., partially elongated. Taxonomic significance of investigated microcharacters as well as the use of SEM-EDS analysis in taxonomic studies of plants are discussed.
Descripción8 p., ilustraciones, gráficos
Versión del editorhttp://dx.doi.org/10.1017/S1431927617000551
URIhttp://hdl.handle.net/10261/152196
DOI10.1017/S1431927617000551
ISSN1431-9276
E-ISSN1435-8115
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