Abstract: In order to screen out lactic acid bacteria with strong nitrite degradation ability from Paocai(Chinese pickle), which can be used in the fermentation of Paocai, a strain PC5 was screened from the Shaanxi homemade Paocai. Strain PC5 was identified as Lactobacillus plantarum by biochemical characteristics and 16S rDNA sequencing. The fermentation characteristics of strain PC5 showed that after 24 h of fermentation, the pH value of the fermentation broth was 3.73±0.01, and the total acid titrated was (1.99±0.01)%. After cultivation in a medium containing 150 mg/L NaNO2 for 24 h, the degradation rate of nitrite could reach (99.37±0.56)%. In addition, tolerance test of strain PC5 revealed that it had a strong tolerance to NaNO2 within a mass concentration of 200 mg/L and NaCl within a mass concentration of 60 g/L. Therefore, strain PC5 had good fermentation characteristics and tolerance, which could be used as a Paocai inoculation fermentation strain.
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