Cork-warts on leaves of Lauraceae: confirming a suspicion
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Abstract
Some studies have reported the presence of leaf cork-warts in several families of plants; however, in Lauraceae, these structures have not been confirmed. Therefore, based on studies of leaf anatomy, we have herein documented the presence of leaf cork-warts in Mezilaurus species of Lauraceae. To accomplish this, we investigated fifteen species from all six genera of the Mezilaurus group, including Anaueria, Chlorocardium, Clinostemon, Mezilaurus, Sextonia, and Williamodendron. Analyses of leaf anatomy were performed through optical and scanning electron microscopy. Our results revealed cork-warts in six species of the genus Mezilaurus: M. crassiramea, M. navalium, M. revolutifolia, M. subcordata, M. synandra, and M. vanderwerffii. In the investigated species M. crassiramea and M. navalium, cork-warts originated from the stomatal complex, from epidermal cells covering oil cells located in mesophyll, and from epidermal cells around trichomes. Therefore, cork-warts could be considered an additional taxonomic character to delimit Mezilaurus species.
Keywords
Epidermal cells Lenticels Secretory idioblasts Stomata TrichomesNotes
Acknowledgements
The authors thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for a scholarship to the first author, the Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul (FUNDECT-PAPOS) for financial support of the Plant Anatomy Laboratory, and the curators of the Herbaria that allowed access to Lauraceae collections.
Compliance with ethical standards
Conflict of interest
The authors declared that they have no conflict of interest.
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