Figure 1

Effects of different medium and nutrient sources on Xcn1 production. (a) The structure of Xenocoumacin 1 (Xcn1). (b) Effects of different media on Xcn1 production. (c) Effects of various nitrogen sources on Xcn1 production. Abbreviation of nitrogen sources (SP: Soy peptone; TP: Tryptone; PP: Proteose peptone; BP: Beef peptone; YE: Yeast extract; PN: Potassium nitrate; UR: Urea; BA: Beef paste). (d) Effects of different carbon sources on Xcn1 production. Abbreviation of carbon sources (GL: Glucose; FR: Fructose; MA: Maltose; ST: Starch; DE: Dextrin; LA: Lactose; SU: Sucrose). (e) Effects of various inorganic salts on Xcn1 production. Abbreviation of inorganic salts (KP: K₂HPO₄; MS: MgSO₄; NS: Na₂SO₄; NC: NaCl). (f) Effects of various concentrations of proteose peptone, maltose and K₂HPO₄ on Xcn1 production. The data represent the mean values of three independent replicates, and the error bars represent the standard deviations. Data with different letters are significantly different at P < 0.05 by Duncan’s multiple range tests.