Physicochemical Properties and Antibiosis Activity of the Pink Pigment of Erwinia persicina Cp2

The control and management of fungal diseases is a worldwide problem. A variety microbial pigments have excellent antibacterial effects, naturally occurring bacterial may help in tackling diseases. In order to explore the basic properties biological functions pink pigment produced by Erwinia persicina Cp2, we used organic solvents extract pigment, analyzed physicochemical determined chemical composition using ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), selected five pathogenic fungi study inhibitory effects pigment. results showed that main component was usambarensine, which had good light stability temperature at room (<40 °C), but influence oxidant on its activity greater than reductant; simultaneously, found strong acids, alkalis, Cu2+, Zn2+ all greatly affect while Fe2+ Fe3+ made darker. Meanwhile, could exert effect against four plant fungi: Alternaria solani, Sclerotinia sclerotiorum, Rhizoctonia Fusarium proliferatum. However, inhibition oxysporum. f. sp cucumerinum decreased significantly later stages. This detected purification process antifungal Cp2. It lays theoretical practical foundation for production related agents.