Micromorphology of epicuticular waxes in genus Mimosa (Fabaceae)

Authors

  • Mariana C. Grohar Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Intendente Güiraldes 2620, Ciudad Autónoma de Buenos Aires 1428, Argentina; Instituto de Recursos Biológicos, Instituto Nacional de Tecnología Agropecuaria (INTA). N. Repetto y Los Reseros s/n, Hurlingham 1686. Buenos Aires, Argentina. https://orcid.org/0000-0001-9358-9771
  • Matías Morales Instituto de Recursos Biológicos, Instituto Nacional de Tecnología Agropecuaria (INTA). N. Repetto y Los Reseros s/n, Hurlingham 1686. Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Godoy Cruz 2900, C1425FQB Ciudad Autónoma de Buenos Aires, Argentina. https://orcid.org/0000-0003-2017-6292
  • Renée H. Fortunato Instituto de Botánica Darwinion (CONICET/ACEFYN), Labardén 200, San Isidro B1642HYD, Buenos Aires, Argentina. https://orcid.org/0000-0002-1569-8849
  • Sonia Rosenfeldt Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Intendente Güiraldes 2620, Ciudad Autónoma de Buenos Aires 1428, Argentina. https://orcid.org/0000-0003-3273-1484

DOI:

https://doi.org/10.14522/darwiniana.2023.111.1084

Keywords:

Epicuticular waxes, epidermis, Fabaceae, micromorphology, Mimosa

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.

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Published

31-07-2023

How to Cite

Grohar, M. C., Morales, M., Fortunato, R. H., & Rosenfeldt, S. (2023). Micromorphology of epicuticular waxes in genus Mimosa (Fabaceae). Darwiniana, Nueva Serie, 11(1), 5–22. https://doi.org/10.14522/darwiniana.2023.111.1084

Issue

Section

Structure and Development