Screening and identification of Weissella cibaria with antioxidant activity in Sichuan traditional pickles and analysis of its characteristics

37 lactic acid bacterial strains were isolated from different fermentation stage of pickled ginger,pepper,garlic salt water,strain SJ14 with strong antioxidant activity was picked out.The scavenging ability of 1,1- Diphenyl-2- picrylhydrazyl radical( DPPH·) and superoxide anion radical( O-2·) by living cells and cell- free extracts of strain SJ14 were 67.23%,35.22% and 37.83%,25.66%.Identification by morphology of colony and cell,physiological and biochemical tests and molecular genetics that strain SJ14 was Weissella cibaria.Compared with Lactobacillus plantarum N2 and Leuconostoc mesenteroides 8m- 9,Weissella cibaria SJ14 had prominent ability of acid production,salt resistance and nitrite degradation,and there were not antagonism among SJ14,N2,8m- 9. The results provided the data reference for pickles of strains synergism fermention.