Fusarium sambucinum causes dry rot disease and postharvest storage losses in potatoes. Understanding the defense mechanisms of potato plants may lead to the development of rational disease control approaches. In the present study, "Kexin one" potato variety was infected with F. sambucinum, and samples were collected at 0, 10, and 20 d post-infection and analyzed using ultra-performance liquid chromatography and quadrupole time-of-flight mass spectrometry to determine metabolic differences. We identified 1049 significant differential metabolites belonging to 12 categories, including organic and amino acids and peptides, which can be biomarkers for dry rot in potatoes following F. sambucinum infection. Physiological and biochemical indicators of dry rot potatoes were explored, and the results were consistent with those of metabolomic data. The findings of this study provide a basis for the control of dry rot and prevention of postharvest losses in potatoes.
Keywords: Dry rot; Fusarium sambucinum; Metabolomics; Postharvest storage; Potato; UPLC-Q-TOF/MS.
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