Method for extracting endotoxin of cotton verticillium wilt pathogenic bacteria and application of endotoxin

The invention provides a method for extracting the endotoxin of the cotton verticillium wilt pathogenic bacteria and the application of the method. The endotoxin of the cotton verticillium wilt pathogenic bacteria can be effectively extracted by adopting specific process parameters and an extraction method, and the technical defect that in the prior art, extracted extracellular toxin serves as an infection source, but no plant diseases occur is overcome. According to the endotoxin of the cotton verticillium wilt pathogenic bacteria extracted by the extraction method provided by the invention, the pathogenicity to cotton is verified by adopting a leaf disc method, leaf discs not only have yellowing but also have obvious emphasizing phenomena of blight, and the endotoxin obtained by the extraction method provided by the invention has relatively high infectivity; the method has wide practicability and huge potential development value in the technical field of cotton disease-resistant breeding. 本发明提供的一种提取棉花黄萎病致病菌