Effect of Temperature on the Growth of E coli Optimum temperature 3.0 of growth(37°cC 20 号 Minimum 10 temperature Maximum growth temperature 〔8°c〕 of growth 48°C〕 20 30 40 50 F405060708090100110120 Temperature
pH ● Neutrophiles嗜中性菌(5to8) ● Acidophiles嗜酸性菌( below5.5) ● Alkaliphiles嗜碱性菌( above8.5)
pH ⚫ Neutrophiles 嗜中性菌（ 5 to 8） ⚫ Acidophiles 嗜酸性菌（below 5.5） ⚫ Alkaliphiles 嗜碱性菌（above 8.5）
Minimum, maximum and optimum ph for growth of certain procaryotes. Organism Minimum pH Optimum ph Maximum ph Thiobacillus thiooxidans 2.0-2.8 4.0-6.0 Sulfolobus acidocaldarius 1.O 2.0-3.0 5.0 Bacillus acidocaldarius 2.0 4.0 6.0 Zymomonas lindneri 3.5 5.5-6.0 7.5 Lactobacillus acidophilus 4.0-4.6 5.8-6.6 Staphylococcus aureus 70-7.5 Escherichia coli 6.0-70 9.0 Clostridium sporogenes 50-5.8 6.0-7.6 8.5-9.0 Erwinia carotovora 5.6 93 Pseudomonas aeruginosa 6 66-7.0 8.0 Thiobacillus novellus 70 9.0 Streptococcus pneumoniae 6.5 Nitrobacter spp 7.6-8.6 10.0
Gas Requirements
Gas Requirements
Terms used to describe 02 Relations of Microorganisms Environment rou Aerobic Anaerobic O2 Effect Obligate aerobe Growth No growth Required (utilized for aerobic respiration) Growth if level Microaerophiles No growth Required but at levels below 0.2 not too high Obligate anaerobe o grow th Growth Toxic Facultative Anaerobe Not required for growth but Growth Growth (Facultative Aerobe utilized when available Aerotolerant Anaerobe Growth Growth Not required and not utilized