DNA Barcoding of Two Thymelaeaceae Species: Daphne mucronata Royle and Thymelaea hirsuta (L.) Endl

Abstract

Daphne mucronata Royle and Thymelaea hirsuta (L.) Endl both belong to the Thymelaeaceae family. Both species are used traditionally to treat several diseases along with various daily applications by Jordanian Bedouins. Traditionally, those species are identified through personal proficiency, which could be misleading due to human errors or lack of expertise. This study aims to investigate an effective DNA barcoding method to identify and characterize Daphne mucronata Royle and Thymelaea hirsuta plant species at the molecular level. Daphne mucronata Royle and Thymelaea hirsuta were collected from the ancient city of Petra in the Southern part of Jordan. Sequences of candidate DNA barcodes were amplified (rbcL, matK, and rpoC1), sequenced, and aligned to the blastn database. Moreover, the obtained sequences were compared with available sequences of related species at the GenBank database. Our results showed that DNA barcoding successfully identifies the two plant species using any of chloroplast genes (rbcL, matK, or rpoC1). The results emphasize the ability of DNA barcoding for identifying and characterizing different plant species through the recruitment of different barcode loci in molecular identification.

Evaluating the Efficacy of Three DNA Barcodes in Identifying the Medicinal Species Ceropegia lodarensis (Lavranos) Bruyns (Apocynaceae)

“…The DNA barcoding technique has been proven to be an effective tool for distinguishing medicinal plant species (Al-Qurainy et al, 2011;Khan et al, 2017;Alkaraki et al, 2021). However, this study revealed that the nuclear ITS and the chloroplast psbA-trnH and trnL-trnF barcodes had a low capacity for identifying C. lodarensis at the molecular level.…”