FIG 5.

The metabolic profiles of Aspergillus flavus strains were more similar at 37°C than room temperature. The metabolomic profiles of A. flavus NRRL 501 and NRRL 1957 were almost identical at 37°C, showing very similar metabolites in the UPLC-MS analysis; most of the metabolites identified were fatty acids and ergosterol derivatives. In contrast, the profiles were significantly different at room temperature. (A) Principal-component analysis for all strains at 37°C. Circles represent both presence of metabolites and relative abundance. (B) Principal-component analysis for all strains at room temperature. Circles represent both presence of metabolites and relative abundance. (C) Hierarchical clustering of strains based on metabolite profiles at 37°C. (D) Hierarchical clustering of strains based on metabolite profiles at room temperature.