To study the biodiversity of Lactic acid bacteria( LAB) from potato,in this study,10 samples of potato from different sources of Qinghai were collected,the strains obtained from potato were identified with physiological and biochemical characteristics including catalase test,fermentation of glucose,carbon source fermentation test and 16 S rR NA gene sequencing.The result showed that lactic acid bacteria were successfully isolated from the 10 samples;types of LAB isolated from roots were more than that of th...