Antioxidant properties in some selected cyanobacteria isolated from fresh water bodies of Sri Lanka.
Phytonutrients and pigments present in cyanobacteria act as antioxidants, which facilitate the formation of body's defense mechanism against free radical damage to cells. The aim of this investigation was to study the total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, phycobiliproteins (PBPs), and active compounds in four cyanobacterial species, that is, Oscillatoria sp., Lyngbya sp., Microcystis sp., and Spirulina sp. isolated from fresh water bodies of Sri Lanka. In this study, Lyngbya sp., showed highest TPC (5.02 ± 0.20 mg/g), TFC (664.07 ± 19.76 mg/g), and total PBPs (127.01 mg/g) value. The ferric reducing antioxidant power (FRAP) was recorded highest in Oscillatoria sp. (39.63 ± 7.02), whereas the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity was also reported the highest in Oscillatoria sp. (465.31 ± 25.76) followed by Lyngbya sp. (248.39 ± 11.97). In FTIR spectroscopy, Lyngbya sp. does not show any N-H stretching band which is ultimately responsible for the inhibition of antioxidant activity. The study revealed that Lyngbya sp. and Oscillatoria sp. can be an excellent source for food, pharmaceutical, and other industrial uses.
National Institute of Fundamental Studies Hantana Road Kandy Sri Lanka; Department of Agricultural Biology Faculty of Agriculture University of Ruhuna Mapalana Kamburupitiya Matara Sri Lanka.
Md Fuad
MF
Hossain
National Institute of Fundamental Studies Hantana Road Kandy Sri Lanka.
R R
RR
Ratnayake
Faculty of Science and Technology Uva Wellassa University Badulla Sri Lanka.
Kirisnashamy
K
Meerajini
Department of Agricultural Biology Faculty of Agriculture University of Ruhuna Mapalana Kamburupitiya Matara Sri Lanka.
K L
KL
Wasantha Kumara
Antioxidant; DPPH; FRAP; cyanobacteria; phycobiliproteins; total flavonoid content; total phenolic content