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All Journal Biodiversitas Journal of Biological Diversity
Deepak Pant
Central Department of Botany, Tribhuvan University. 44613 Kirtipur, Nepal
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Nutritional potential of selected species of Arisaema Mart. from Nepal Laxmi Dhakal; Biva Aryal; Giri Joshi; Deepak Pant
Biodiversitas Journal of Biological Diversity Vol. 21 No. 12 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d211229

Abstract

Abstract. Dhakal L, Aryal B, Joshi GP, Pant DR. 2020. Nutritional potential of selected species of Arisaema Mart. from Nepal. Biodiversitas 21: 5703-5709. Species of Arisaema Mart. are believed to be poisonous, but few species are used as food in different communities. Therefore, an assessment of nutritional properties of six selected taxa of Arisaema including three edible taxa was made in order to find out their nutritional potential. Methanolic or aqueous extracts of samples (rhizomes and aerial parts) were analyzed for various nutritional and anti-nutritional parameters. On nutritional basis, the total starch content and total reducing sugar were found highest (25.71±0.04mg/g powder) and (46.73±0.06 mg/g extract), respectively in aerial parts of A. echinatum. Total protein and phosphorus content was highest in rhizome of A. tortuosum var. curvatum. Similarly, extracts of aerial parts of A. tortuosum var. curvatum also possessed highest amount of total phenolic content (52.67±0.24mg GAE/g), total flavonoid content (14.13 ± 0.03 mg QE/g), and also demonstrated best antioxidant activity (IC50, 108.59±0.54 µg/mL) in terms of DPPH radical scavenging activity among the selected taxa. Inhibition of ?-amylase and ?-glucosidase in vitro was found to be highest (78.82 %) in rhizome extracts of A. echinatum and extracts of aerial parts of A. concinnum (34.82 %), respectively.
Inhibition of a-amylase and a-glucosidase activities in vitro by extracts of selected medicinal plants Deepak Pant; BIVA ARYAL; DAMA PUN; SUSHILA SHARMA; GIRI PRASAD JOSHI
Biodiversitas Journal of Biological Diversity Vol. 22 No. 3 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220314

Abstract

Abstract. Pant DR, Aryal B, Pun D, Sharma S, Joshi GP. 2021. Inhibition of a-amylase and a-glucosidase activities in vitro by extracts of selected medicinal plants. Biodiversitas 22: 1187-1193. Several medicinal plants are being used traditionally in the treatment/management of Diabetes Mellitus (DM). The present work focuses on experimental verification of antidiabetic potential of different medicinal plants that have been reported to be used traditionally to manage DM. Aqueous and methanolic extracts of 12 species of plants were studied for their inhibitory effect on the activities of a-amylase and a-glucosidase, two key enzymes of carbohydrate metabolism. The extracts of all the species showed very high degree (nearly 90% or above) of inhibition of ?-amylase irrespective of the extraction solvent. The aqueous extracts of Asterella wallichiana, however, showed only 63.60% inhibition of a-amylase. Except for Asterella wallichiana, the percentage inhibition of a-amylase in aqueous and methanolic solution in all the species tested were almost similar. The percentage inhibition of a-glucosidase was lower than that of a-amylase for all the species in both types of extraction medium. The highest percentage inhibition of a-glucosidase (81.13±1.36 %) was found in methanolic extracts of Rhuschinensis. The inhibition of a-glucosidase was much higher in methanolic extracts than in aqueous extracts for all the species tested. High degree of inhibition of a-amylase activity in vitro by the extracts of all the species tested provides scientific basis for using these plants in the management/treatment of diabetes in traditional medicine.
Co-Authors BIVA ARYAL Biva Aryal DAMA PUN Giri Joshi GIRI PRASAD JOSHI Laxmi Dhakal SUSHILA SHARMA