上海交通大学：《微生物学 Microbiology》课程教学资源（双语课件）Lecture 5.3 Microbial Growth（Environmental Effects on Microbial Growth）

上泽文通大学 Shanghai Jiao Tong University Lecture 5-3 Microbial Growth IV.Environmental Effects on Microbial Growth Zhao Liping,Chen Feng School of Life Science and Biotechnology, Shanghai Jiao Tong University, http://micro.sjtu.edu.cn

Lecture 5-3 Microbial Growth IV. Environmental Effects on Microbial Growth Zhao Liping, Chen Feng School of Life Science and Biotechnology, Shanghai Jiao Tong University, http://micro.sjtu.edu.cn

上游充廷大￥ Shanghai Jiao Tong University T IV.Environmental factors affecting bacterial growth ©Temperature pH Osmolarity /ater activity Oxygen No.2 Shanghai Jiao Tong University

No.2 Shanghai Jiao Tong University IV. Environmental factors affecting bacterial growth Temperature pH Osmolarity /Water activity Oxygen

上泽充通大学 Shanghai Jiao Tong University 5.10 Effect of Temperature on Growth 5.10.1 Cardinal temperatures基本温度 Minimum temperature最低生长温度 temperature below which growth no longer occurs Optimum temperature最适生长温度 temperature at which growth is most rapid Maximum temperature.最高生长温度 temperature above which growth is not possible No.3 Shanghai Jiao Tong University

No.3 Shanghai Jiao Tong University 5.10 Effect of Temperature on Growth 5.10.1 Cardinal temperatures基本温度 Minimum temperature最低生长温度 • temperature below which growth no longer occurs Optimum temperature最适生长温度 • temperature at which growth is most rapid Maximum temperature最高生长温度 • temperature above which growth is not possible

上泽充通大￥ Shanghai Jiao Tong University Cardinal temperatures基本温度 are generally characteristic of each type of organism but they can be modified slightly by other factors of the environment;in particular,by the composition of the growth medium. No.4 Shanghai Jiao Tong University

No.4 Shanghai Jiao Tong University Cardinal temperatures基本温度 are generally characteristic of each type of organism but they can be modified slightly by other factors of the environment; in particular, by the composition of the growth medium

Cardinal temperatures and the molecular consequences for the ce基本温度与分子活性的关系 Enzymatic reactions occurring at maximal possible rate Optimum ajel Enzymatic reactions occurring at increasingly rapid rates Minimum Maximum Temperature Membrane gelling;transport Protein denaturation;collapse processes so slow that growth of the cytoplasmic membrane; cannot occur thermal lysis 2012 Pearson Educaticn,Inc

Cardinal temperatures and the molecular consequences for the cell基本温度与分子活性的关系