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11
Radical scavenging activity of leafy amaranths as potential antioxidant sources
Muhammad Ikhsan Sulaiman
1,
, Rita Andini
1
1
Department of Agricultural Processing Technology, Faculty of Agriculture, Syiah Kuala University
Darussalam, Banda Aceh, 23111, Indonesia Corresponding author: misulaimanthp.unsyiah.ac.id
Abstract
Amaranths are popular leafy vegetables in the diet among the people in Asia particularly Indonesia. Previous study exhibited that the
leaves of amaranths were rich in quality protein particularly containing high lysine, which is the limiting essential amino acid in cereals. Fast growing
and high tolerance to drought, marginal land and extreme climate had made this nutritious plant as promising crop for human future. This research
reported the DPPH
radical scavenging activity of leaves of 16 amaranth’s accessions from personal collection and USDA that were grown in polybags.
The leaves were harvested before flowering. Total phenol and inhibition capacity of DPPH free radicals IC
50
as indication for radical scavenging activity were measured by using uv-vis spectrophotometer. The results
indicated that Amaranthus tricolor from USA and A. hybridus from Zimbabwe was the weakest and the strongest IC
50
with 13.83 mgml and 1.30 mgml, respectively. Correlation was not observed between IC
50
and total phenol content. This result highlighted the importance of leafy
amaranth as potential sources of antioxidant. Keywords
Amaranthus, radical scavenging activity, antioxidant