Antioxidant Properties and α-Amylase Inhibition Activities of Four Different Curcuma Species in Sri Lanka

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dc.contributor.authorSamarasinghe, K.G.B.A.
dc.contributor.authorKaliyadasa, P.E.
dc.contributor.authorMarasinghe, P.
dc.date.accessioned2021-01-19T09:23:32Z
dc.date.available2021-01-19T09:23:32Z
dc.date.issued2020
dc.description.abstractThe genus Curcuma belongs to the family Zingiberaceae comprises rhizomatous annual or perennial herbs. Curcuma has a long history of traditional uses ranging from folk medicine to its culinary uses. This study was undertaken to study the biological activities of rhizomes and leaves of four Curcuma species available in Sri Lanka namely, Curcuma albiflora, Curcuma aromatica, Curcuma longa, and Curcuma zedoaria. Fresh rhizomes and leaves of four Curcuma species were collected from their natural habitats in Wet and Dry Zones of Sri Lanka. Rhizomes and leaves were cleaned and cut into small pieces and oven-dried at 45 °C and 40 °C respectively for 12 hrs. Dried samples were ground into a fine powder. Methanol extracts from rhizomes and leaves were screened for total polyphenol content (TPC), antioxidant activity, and α-amylase inhibition activities. The TPC of dried rhizomes of Curcuma longa was the highest of all tested as 5.530 ± 0.012 g of GA equivalents per 1 g of the dried rhizome. The Methanol extracts of the rhizome and leaf samples of four species showed moderate antioxidant activity in the DPPH radical scavenging assay with IC50 values ranging from 150.253 ± 0.273 ppm to 389.051 ± 0.426 ppm. Interestingly the rhizome extracts of Curcuma aromatica, Curcuma longa, and Curcuma zedoaria exhibited higher α-amylase inhibitory activities (13.915 ± 0.023, 6.455 ± 0.117 and 9.492 ± 0.024 respectively) than the Acarbose drug which is an antidiabetic drug (28.273±0.615 ppm). The results revealed that the Sri Lankan Curcuma species have a potency to be used as a source of antioxidant and antidiabetic agents and it is important to increase the value of the unexplored medicinal herbs available in Sri Lanka. Keywords: Antioxidant, Anti-diabetic, Biological Activities, Curcumaen_US
dc.identifier.isbn9789550481293
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/5605/proceeding_oct_08-70.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;International Research Conference
dc.subjectAgricultureen_US
dc.subjectAgriculture Technologyen_US
dc.subjectAntioxidanten_US
dc.titleAntioxidant Properties and α-Amylase Inhibition Activities of Four Different Curcuma Species in Sri Lankaen_US
dc.title.alternativeInternational Research Conference 2020en_US
dc.typeOtheren_US
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