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Antioxidant properties of selected varieties of lettuce (Lactuca sativa L.) commercially available in Malaysia
Gan, Y.Z1, Azrina, A2.
This study aimed to determine total antioxidant and antioxidant activity of selected local varieties
of lettuce (Lactuca sativa L.). Five varieties (iceberg, butterhead, romaine, green coral and
red coral) were subjected to DPPH radical scavenging activity and ferric reducing antioxidant
power assay (FRAP) assays for determination of antioxidant activity. Total phenolic content
and total flavonoid content were determined as total antioxidant. The EC50 values obtained from
the DPPH radical scavenging assay ranged from 303.56 to 4485.41 μg/ml. The red coral lettuce
had the lowest EC50 value indicating it possesses the highest antioxidant activity among the
varieties. This variety also showed the highest FRAP value compared with the other varieties,
where the values ranged from 48.05 to 2135.82 mM Fe2+/100 g fresh weight. Total phenolic
content of samples ranged from 4.85 to 76.05 mg gallic acid equivalent/100 g fresh weight,
with the red coral lettuce had the highest value. Total flavonoid content of the lettuce samples
ranged from 2.28 to 21.96 mg quercetin equivalent/100 g fresh weight, and were significantly
different (p<0.05) among the samples. The EC50 values of DPPH radical scavenging activity
and FRAP values among samples were highly correlated with total phenolic content and total
flavonoid content. Among the different varieties of lettuce, red coral lettuce showed the highest
total antioxidants and antioxidant activity. Therefore, consumers are encouraged to consume
this lettuce more on a regular basis for gaining a better health.
Affiliation:
- Universiti Putra Malaysia, Malaysia
- Universiti Putra Malaysia, Malaysia
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Indexation |
Indexed by |
MyJurnal (2019) |
H-Index
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0 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Scopus (SCImago Journal Rankings 2016) |
Impact Factor
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- |
Rank |
Q3 (Food Science) |
Additional Information |
0.335 (SJR) |
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