Vol. 11, Special Issue 10 (2022)

Author(s):
Ashiwini G, Narayanaswamy B, Suvarna VC, Munishamanna KB and Suresh KB

Abstract:
Lactic acid bacterial population in jackfruit and beet root juice varied from 1.9 to 2.1 x 10⁶ and 1.1 to 1.3 x 10⁶ respectively. The colony colour varied from whitish to cream. Cell shape varied from rod to cocci. LAB isolates JCVL-II and BDVL-III were tolerant to pH 1.5 to 8.5 and bile salt concentration upto 2.0%. Most of the LAB isolates were resistant to antibiotics Streptomycin (10 μg/disc), Gentamycin (10 μg/disc), Kanamycin (30 μg/disc) and Ciprofloxacin (5 μg/ disc) and susceptible to Ampicillin (10 μg/disc) and Chloramphenicol (30 μg/disc). Antimicrobial activity with highest zone of inhibition against Escherichia coli NCIM 2065 and Staphylococcus aureus NCIM 2079 was produced by JCVL-II i.e., 25.33 mm and 18.67 mm (in diameter) respectively. Molecular characterization of JCVL-II and BDVY-III isolates identified it as Lactiplantibacillus plantarum and Levilactobacillus brevis respectively.