Integrated Standardization of Pergularia daemia (forssk.) Chiov. Using Pharmacognostic and Molecular Techniques

Background

This research paper aims to establish comprehensive pharmacognostical standards and DNA barcode markers for Pergularia daemia (Forssk.) Chiov., a medicinally important plant in traditional medicine systems. Pharmacognostical work reveals it’s identification, make more easier for formulating traditional system.

Materials and Methods

The research involved macroscopic, microscopic, powder microscopic, and quantitative microscopic analyses along with histochemical evaluations to develop quality control parameters. DNA barcoding using rbcL as a marker was performed to authenticate the species at a molecular level.

Results

The microscopic studies revealed diagnostic features including rosette crystals, multicellular trichomes, latex content, paracytic stomata, and distinct vascular structures. The DNA barcode for the species was successfully generated and submitted to GenBank (Accession numbers: PQ740391 and PQ740392). The quantitative parameters (stomatal index 25-28, palisade ratio 14-16, macroscopic/ microscopic features (rosette crystals, multicellular trichomes, paracytic stomata) and seed characteristics (dorsiventrally flattened, 850-1100 µm thick: trichomes 150-350 µm) while histochemistry reveals alkaloids, phenolic, mucilage, oils, lignin and starch mostly in vascular/epidermal tissues palisade ratio 14-16), macroscopic/microscopic features (rosette crystals, multicellular trichome, paracytic stomata) and seed characteristic (dorsiventrally flattened 850-1100 µm thick; trichome 150-350 µm). DNA barcoding via rbcL market established molecular identity and pharmacognosy for strong authentication.

Conclusion

This standardization study provides a comprehensive set of parameters for the authentication of P. daemia, which can be used to ensure the quality and purity of this medicinal plant in herbal formulations.