上帝充通大学 Shanghai Jiao Tong University Nutritional requirements of different microbes Different microorganisms can have vastly different nutritional requirements because they have different biosynthetic capacities E.coli:capable of synthesizing all organic compounds it needs Leuconostoc mesenteroides:need many externally provided organic compounds-extremely fastidious(nutritionally demanding)肠膜明串珠菌（需要极复杂营养的） Shanghai Jiao Tong UniversityShanghai Jiao Tong University Nutritional requirements of different microbes Different microorganisms can have vastly different nutritional requirements because they have different biosynthetic capacities • E. coli: capable of synthesizing all organic compounds it needs • Leuconostoc mesenteroides: need many externally provided organic compounds-extremely fastidious (nutritionally demanding)肠膜明串珠菌（需要极复杂营养的）