Anatomical Attributes of Two Endemic Medicinal Plant Species, Vincetoxicum albovianum and Vincetoxicum coskuncelebiana (Asclepiadoideae: Apocynaceae)
Abstract
Aim of study: The present study aimed to examine the anatomy of vegetative and generative organs of two Caucasian endemic medicinal plants, Vincetoxicum albovianum and V. coskuncelebiana, for the first time, to contribute to their identification.
Area of study: Plant samples of V. albovianum were collected from Batumi (Georgia) and V. coskuncelebiana from Ardahan (Türkiye).
Material and method: Anatomical examinations were performed on cross and longitudinal sections taken from the root, stem, petiole, leaf blade and pericarp, and on surface sections from leaves of plant samples stored in 70% ethanol. All sections were photographed from permanent slides, and anatomical traits were measured or scored, using a light microscope.
Main results: The examined taxa were characterised with bicollateral vascular bundles, laticifers and druse crystals in vegetative and generative organs, specific to Apocynaceae. Cross and superficial sections revealed the presence of collenchyma cells and scattered sclerenchyma cell groups in the stem and mesocarp, and paracytic, anomocytic and anisocytic stomata on the abaxial side of bifacial and hypostomatic leaves.
Research highlights: The most distinguishing features between the two species examined were the dimensions of anatomical tissues in vegetative and generative organs, and the distribution and density of epidermis and stomata cells in leaves.
Keywords
Anatomy, Endemic Plant, Georgia, Türkiye, Vincetoxicum albovianum, Vincetoxicum coskuncelebiana
Thanks
The author would like to thank Dr. Nino Memiadze and Dr. Zurab Manvelidze from the Batumi Botanical Garden (Georgia) for their help in collecting samples of Vincetoxicum albovianum, as well as Prof. Dr. Serdar Makbul and Prof. Dr. Kamil Coşkunçelebi for their valuable comments on the manuscript.
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