The Effect of Variety and Fertilizer Application on Functional Properties of ‘Mukunuwenna’ (<em>Alternanthera sessilis)</em>

Abstract

The study investigated the functional properties, such as antioxidant activity, phenolic content and ascorbic acid content of the popular leafy vegetable, Alternanthera sessilis ('Mukunuwenna'). Two varieties such as Piliyandala and Colombo Selection grown under four different fertilizer application types namely, Inorganic fertilizer mixture recommended by the Department of Agriculture (Urea 9 kg/1000 m 2 , MOP 13.5 kg/1000 m 2 , TSP 10 kg/1000 m 2 ), Integrated treatment [mixture of inorganic (Urea, MOP and TSP) and organic fertilizer (cattle manure and gliricidia)], Organic fertilizer (cattle manure and gliricidia) and Homescale cultivation (No fertilizer) were used. Antioxidant activity (AOA) of the methanolic leaf extract was determined by using 2, 2diphenyl-1-picryl hydrazyl (DPPH) Radical Scavenging Assay. Phenolic content (PC) and ascorbic acid content (AAC; IC50 value) were

Total Phenolic Content, Antioxidant Activity and <em>in vitro</em> Bioaccessibility in “Gasnivithi” (<em>Talinum triangulare</em>) and “Keren koku” (<em>Acrostichum aureum</em>) Available in Sri Lanka

“…These values were consistent with the values reported for several Acrostichum and Talinum species from Nigeria and Uganda (Nwazue, 2011;Khan et al, 2013;Hanin and Pratiwi, 2017). Moreover, AAC levels in the studied UP were higher than reported values for other common leafy vegetables available in Sri Lanka (Jayawardana et al, 2018). Among them, Centella asiatica is one of the prominent leafy vegetables, and the AAC of different Centella ranged from 9.73 to 48.5 mg/100 g (Chandrika et al, 2015).…”

Antioxidant Capacity of Indigenous Root and Tuber Crops of Sri Lanka as Affected by Simple Processing

“…The total phenolic contents (TPC) of root and tuber samples were determined by the Folin-Ciocalteu method as described by Thaipong et al [17] with slight modifications [16]. From the powdered yam sample, 0.5 g was mixed with 100 ml of absolute methanol and kept in an electric shaker for 24 h. A volume of 150 µl from the filtered extract, 150 µl of Folin-Ciocalteu reagent (3 ml of Folin-Ciocalteu reagent diluted with 50 ml of distilled water) and 2400 µl of distilled water were added together and mixed in a vortex.…”