The antioxidant capacity and antioxidant constituents of two filamentous fungi (
Acremonium charticola and
Rhizopus oryzae) isolated from the Indonesian fermented dried cassava (
gathot) were evaluated in the present study. The antioxidant capacity of the fungal crude extracts was assessed
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The antioxidant capacity and antioxidant constituents of two filamentous fungi (
Acremonium charticola and
Rhizopus oryzae) isolated from the Indonesian fermented dried cassava (
gathot) were evaluated in the present study. The antioxidant capacity of the fungal crude extracts was assessed based on the 2,2′-azino-bis(3-ethyl-benzthiazolin-6-sulfonicacid) (ABTS) method. Total phenolics were determined based on the Folin-Ciocalteu method, while the flavonoids content in the fungal extracts was determined by the spectrophotometric method with aluminum chloride. Total tannins were estimated by the Folin-Denis method. The ABTS
+ radical scavenging activity was higher (
p < 0.01) in
A. charticola compared to that in
R. oryzae and ascorbic acid (as a control). A higher (
p < 0.01) content of total phenolics was detected in
A. charticola than that in
R. oryzae. Total flavonoids were higher (
p < 0.01) in
R. oryzae as compared with that in
A. charticola. The fungus
A. charticola had a higher (
p < 0.01) level of total tannins than
R. oryzae. In conclusion, both filamentous fungi isolated from the Indonesian fermented dried cassava exhibited antioxidant potentials as indicated by their capabilities to scavenge ABTS
+.
A. charticola had a higher antioxidant capacity than
R. oryzae. The antioxidant capacity of
A. charticola was attributed mainly to its phenolics and tannins contents.
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