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MICROMORPHOLOGY OF EPICUTICULAR WAXES IN GENUS MIMOSA (FABACEAE).
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- Author(s): Grohar, Mariana C.1,2 ; Morales, Matías2,3; Fortunato, Renée H.4; Rosenfeldt, Sonia1
- Source:
Darwiniana. jul2023, Vol. 11 Issue 1, p5-22. 18p. - Source:
- Additional Information
- Alternate Title: Micromorfología de ceras epicuticulares en el género Mimosa (Fabaceae).
- Subject Terms:
- Abstract: Las ceras epicuticulares cristalizan sobre la superficie foliar con diferentes morfologías, las cuales pueden ser de relevancia taxonómica en muchos taxones. El análisis micromorfológico fue basado en imágenes obtenidas con microscopía electrónica de barrido (MEB) de ejemplares de herbario de algunas secciones de Mimosa. El presente trabajo es la primera descripción y clasificación detallada de la micromorfología epidérmica en el género Mimosa, centrada en las secciones Calothamnos y Mimosa, subseries Dolentes y Brevipedes. También describe distintas morfologías de cristalización presentes en estos taxones, identificando tres tipos: lámina, placas y plaquetas. Se han descripto nuevas micromorfologías epidérmicas, como las papilas de M. lepidorepens. Estos resultados permiten agrupar los taxones de las secciones estudiadas, contribuyendo a la clarificación de su taxonomía. Las imágenes obtenidas con MEB de la superficie foliar y de las ceras epicuticulares pueden constituirse como una nueva herramienta en la elaboración de una nueva propuesta taxonómica de las secciones Calothamnos y Mimosa subser. Dolentes y subser. Brevipedes. [ABSTRACT FROM AUTHOR]
- Abstract: Epicuticular waxes crystallize on the foliar surface with different morphologies, which can be taxonomically relevant features in many taxa. Their morphological analysis was based on scanning electron microscopy (SEM) images on herbarium specimens of selected sections of Mimosa. The present work is the first detailed description and classification of the epidermal micromorphology in the genus Mimosa, focusing on section Calothamnos and Mimosa series Mimosa, subseries Dolentes and Brevipedes. We also describe different wax crystallization morphologies present in these taxa, identifying three different crystallization types: film, plates, and platelets. Novel epidermal micromorphologies have been described, such as papillae in M. lepidorepens. Results allow grouping taxa of the studied sections, contributing to clarifying their taxonomy. SEM images of epicuticular waxes and leaf surfaces could be a new tool for performing a new taxonomic treatment of section Mimosa subser. Dolentes and subser. Brevipedes, and section Calothamnos. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Darwiniana is the property of Instituto de Botanica Darwinion and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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