Combined effects of γ-irradiation and storage times on sugars composition of Lactarius deliciosus: comparison through linear discrimant analysis

The effects of gamma irradiation on Lactarius deliciosus (L. ex Fr.) S. F. Gray sugars were evaluated in samples submitted to different storage periods (0, 4 and 8 days) at 4 ºC. The irradiations were performed in a 60Co experimental equipment. Changes in sugars were determined by analyzing the results obtained by high performance liquid chromatography coupled to refraction index detection (HPLC-RI) through a 2-way analysis of variance and a linear discriminant analysis. Mannitol was by far the most abundant sugar in the analyzed samples. Regarding sugars profile, storage time proved to have higher influence than irradiation dose, mainly reflected in the decrease of fructose and mannitol in stored samples.