Abstract:
This study reports the antioxidant and antibacterial activities of four fresh mango seed extracts from Thai
varieties. Total phenol contents determined by the Folin-ciocalteu method revealed the highest values to be in
MKE, Chok-a-nan variety (399.8 mgGAE/g extract) and MSE of Nam-dok-mai variety (377.2 mgGAE/g
extract). Both extracts showed potent ABTS˙+ radical and DPPH˙ radical scavenging activities with the lower
half inhibition concentration (IC50) values than those of the reference compounds; vitamin C, trolox and BHA,
respectively. Their antioxidant property of MSE and MKE is strongly correlated with the total phenol contents
(r = 0.98 and 0.98, respectively). When combined the MSE and MKE of the Fah-lun variety showed the
strongest antioxidant activity. All mango seed extracts showed interesting antibacterial activity against both
gram positive and gram negative bacteria as determined by disc diffusion method. The most sensitive
pathogenic strain inhibited by all extracts (especially Kaew variety) was Pseudomonas aeruginosa ATCC
27853. This work suggests potential applications for practical uses of mango seed extracts from Thai varieties,
as sources of antioxidant and antibacterial agents.
