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Stress influenced the aerotolerance of Lactobacillus rhamnosus hsryfm 1301.
Zhang, Chenchen; Lu, Jingyu; Yang, Duo; Chen, Xia; Huang, Yujun; Gu, Ruixia.
Afiliação
  • Zhang C; College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.
  • Lu J; Jiangsu Provincial Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.
  • Yang D; College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.
  • Chen X; Jiangsu Provincial Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.
  • Huang Y; College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.
  • Gu R; Jiangsu Provincial Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.
Biotechnol Lett ; 40(4): 729-735, 2018 Apr.
Article em En | MEDLINE | ID: mdl-29417300
OBJECTIVE: To investigate the aerotolerance of Lactobacillus rhamnosus hsryfm 1301 and its influencing factors. RESULTS: The growth rate of L. rhamnosus hsryfm 1301 weakened noticeably when the concentration of supplemented H2O2 reached 1 mM, and only 2% of all L. rhamnosus hsryfm 1301 cells survived in MRS broth supplemented with 2 mM H2O2 for 1 h. After pretreatment with 0.5 mM H2O2, the surviving cells of L. rhamnosus hsryfm 1301 in the presence of 5 mM H2O2 for 1 h increased from 3.7 to 7.8 log CFU. Acid stress, osmotic stress, and heat stress at 46 °C also enhanced its aerotolerance, while heat stress at 50 °C reduced the tolerance of L. rhamnosus hsryfm 1301 to oxidative stress. Moreover, treatment with 0.5 mM H2O2 increased the heat stress tolerance of L. rhamnosus hsryfm 1301 by approximately 150-fold. CONCLUSIONS: Lactobacillus rhamnosus hsryfm 1301 possesses a stress-inducible defense system against oxidative stress, and the cross-adaptation to different stresses is a promising target to increase the stress tolerance of L. rhamnosus hsryfm 1301 during probiotic food and starter culture production.
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Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Estresse Fisiológico / Lacticaseibacillus rhamnosus / Peróxido de Hidrogênio Idioma: En Revista: Biotechnol Lett Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Estresse Fisiológico / Lacticaseibacillus rhamnosus / Peróxido de Hidrogênio Idioma: En Revista: Biotechnol Lett Ano de publicação: 2018 Tipo de documento: Article