EFFECT OF PHOSPHATE ON COLICIN V FORMATION BY STRAINS OF ESCHERICHIA COLI
- VernacularTitle:磷酸盐对V族大肠杆菌素形成的影响
- Author:
Yanmin HU
;
Shuyan ZONG
;
Zhiru LI
;
- Publication Type:Journal Article
- Keywords:
Colicin;
Inhibitory zone;
Phosphate
- From:
Microbiology
1992;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
ColV~+ strains of Escherichia coli produced larger inhibitory zones when these strains grown on nutrient agar containing phosphate after overlaid sensitive indicators. This appears that production of colicin V is increased by the addition of phosphate to nutrient agar. It was sure that stimulation of phosphate to colicin V formation results from its effect in reducing divalent cation levels in nutrient agar since adding EDTA to nutrient agar had the same effect as phosphate, but the addition of Mg~(2+) or Ca~(2+) had the oppsite effect. Therefore nutrient agar supplemented with phosphate can be used to isolate and identificate ColV~+ strains of E. coli.
