Pharmacognostical and Physicochemical Analysis of Stem Bark of Punica granatum L.

Background

Punica granatum L. (Lythraceae), or pomegranate, is a vital medicinal plant in traditional systems like Ayurveda and Unani. Its stem bark is particularly valued for its healing powers and richness in tannins, traditionally used for astringent, anthelmintic, anti-diarrheal, and anti-inflammatory effects.

Objectives

The primary aim is to develop detailed pharmacognostical and physicochemical criteria for the stem bark to support precise identification, verification, and standardization for future therapeutic applications.

Materials and Methods

Testing included organoleptic, macroscopic, and microscopic (powder and transverse section) examinations. Physicochemical parameters such as ash values, loss on drying, extractive values, fluorescence analysis, and elemental analysis (CHNSO) were determined.

Results

The bark appeared as single or double quills (7-15 cm long) with a greenish-brown outer and yellowish-brown inner surface. Microscopic analysis revealed phellem, phellogen, and phelloderm layers with stone cells and phloem parenchyma. Physicochemical results included total ash (3.11%), loss on drying (4.30%), and water extractive value (10.26% w/w). Elemental analysis confirmed the presence of C, H, N, S, and O.

Conclusion

The data provides essential standard markers for identifying and controlling the quality of Punica granatum L. stem bark, contributing to the scientific validation of its use in herbal medicine.