类球红细菌对亚硝酸盐和食盐及pH的耐受性研究

Research on Tolerance of Rhodobacter sphaeroides to Nitrite,Salt and pH

目的:旨在探讨类球红细菌对亚硝酸盐、食盐和低pH的耐受性,为类球红细菌应用于腌腊肉制品加工提供初步的理论基础。方法:将类球红细菌分别在不同浓度的亚硝酸盐、食盐和低pH胁迫下生长,绘制生长曲线,确定亚硝酸盐、食盐和pH的耐受范围;绘制类球红细菌在亚硝酸盐、食盐和低pH同时存在时的生长曲线。结果:类球红细菌对100 mg/kg的亚硝酸盐、2.5%的食盐和pH 5.8等单因素有良好的耐受性,在100 mg/kg的亚硝酸盐、2.5%的食盐和pH 5.8三因素同时存在时也具有较好的耐受性。结论:类球红细菌对亚硝酸盐、食盐和低pH有较好的耐受性,具有在腌腊肉制品中应用的可能。

Object:The purpose is to investigate the tolerance of Rhodobacter sphaeroides to nitrite,salt and low pH values,and provide a preliminary theoretical basis for application of Rhodobacter sphaeroides in the processing of cured meat products.Methods:Rhodobacter sphaeroides is incubated under different concentration of nitrite,salt and low pH values respectively.The growth curves are drawn and the tolerance ranges for nitrite,salt and pH values are determined.The growth curves of Rhodobacter sphaeroides in the presence of nitrite,salt and low pH values are drawn.Results:Rhodobacter sphaeroides possesses excellent tolerance to 100 mg/kg nitrite,2.5%salt and pH 5.8 respectively.It is also well tolerated in the presence of 100 mg/kg nitrite,2.5%salt and pH 5.8.Conclusion:Rhodobacter sphaeroides exhibits good tolerance to nitrite,salt and low pH values and it could be possibly used in cured meat products.