Pharmacobotanical analysis of Paeonia broteri

  • Proceedings of Symposia
  • Feb, 2022

Pereira, J. & Teixeira, G. (2022) Pharmacobotanical analysis of Paeonia broteri. 8th International Mediterranean Symposium on Medicinal and Aromatic Plants (MESMAP-8), 126. Izmir-Türkiye. ISBN: 978-625-00-9496-9.

Summary:

Paeoniaceae is a monogeneric family where the genus Paeonia includes 35 species [1]. Some are used inntraditional Chinese medicine for their anti-inflammatory and antioxidant properties, among others [2; 3; 4]. Despite this, the information available on the species mentions only a few characters that are not sufficient for their control and the distinction between species has raised some doubts, which can risk their safety and efficacy [5; 6]. We completed microscopic and histochemical analyses to establish botanical authentication for roots, leaves and powdered materials of P. broteri, endemic in Iberia [7]. Plant material was collected from native populations in SW Portugal, identified and vouchers deposited at LISU. Light and scanning electron microscopy and histochemical tests followed standard methods [8; 9]. P. broteri tuberous roots have a secondary growth in which some phelloderm cells are filled with simple and compound starch grains. The first are circular/polyhedral, with a cleft hilum and no striae; the second have 2-3-4 aggregate elements. Some vacuoles of phelloderm cells have druse calcium oxalate crystals. Throughout the root phelloderm, stone cells, positive for lignin are seen. The analysis of the light yellowbrown root powder confirmed these characters. Both leaves epidermal faces show irregular cells with sinuous cell walls. Elliptical and circular anomocytic stomata appear on the leaves lower epidermis. Among the mesophyll cells, druse calcium oxalate crystals are also found, accompanying both the secondary and the main vessels. The powdered leaves acquire an olive-green color and its microscopic observation confirms the previous characters. Histochemical tests on P. broteri roots and leaves allowed the differentiation of the main chemical groups, except alkaloids. This is the first pharmacobotanical study of P. broteri revealing some of the main identifying characters of this species which as diagnostic tools can contribute to the botanical authentication promoting its pharmaceutical and economic importance.


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Team

  • Pharmacobotanical analysis of Paeonia broteri Generosa Maria Manso Teixeira Xavier Plant, lichen and fungi systematics, biogeography & conservation genetics