Species discrimination through DNA barcoding in the genus Salacia of the Western Ghats in India |
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| Authors: | Suma Arun Dev B S Anoop Kurian Anoja P S Udayan E M Muralidharan |
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| Affiliation: | 1. Forest Genetics and Biotechnology Division, Kerala Forest Research Inst., Kerala, India;2. Dept of Botany, Sree Krishna College, Kerala, India |
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| Abstract: | The genus Salacia (Celastraceae) is a source of many important pharmaceutical chemicals used in the Ayurvedic system of medicine in India. Owing to morphological similarities between species, the taxonomy of Salacia is complex and not fully settled. To ensure quality and assured therapeutic effects in the raw drugs from the genus, proper identification at the species level is critical. The main objective of this study was to find suitable DNA barcodes that can accurately and efficiently identify the potential medicinal species of the genus. Among the barcode loci analyzed, ITS2 exhibited the highest interspecific divergence, followed by trnH‐psbA, matK and rbcL. A clear barcoding gap was evident for the ITS2 barcode region whereas it was less conspicuous for trnH‐psbA and matK. The ITS2 barcode could discriminate all the eight analyzed Salacia species with 100% accuracy. We therefore propose barcoding with ITS2 to confirm the taxonomic identity of the raw drugs in the market. Further, the ITS2 region can be recommended for biosystematic studies in the genus. |
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