Comparative evaluation of the probiotic and antioxidant potential of indigenous Lactic Acid Bacteria

Abstract

This study was undertaken to assess the probiotic and antioxidant potential of five indigenous cultures of lactic acid bacteria viz, Lactobacillus acidophilus, Lactiplantibacillus plantarum, Lacticaseibacillus rhamnosus, Lactobacillus bulgaricus and Streptococcus thermophilus. The probiotic properties in terms of acid and bile tolerance, cell surface hydrophobicity, autoaggregation, coaggregation and bile salt hydrolase activity were assessed in vitro. The DPPH assay indicated highest antioxidant activity of 45.33 per cent for Streptococcus thermophilus. All five cultures exhibited significant antioxidant potential. Lacticaseibacillus rhamnosus, Lactobacillus acidophilus and Lactiplantibacillus plantarum showed higher probiotic potential in terms of acid and bile tolerance, cell surface hydrophobicity, autoaggregation and coaggregation. None of the cultures exhibited bile salt hydrolase activity.

Keywords

• lactic acid bacteria
• probiotic
• antioxidant