Abstract:

This study aimed to examine the influence of nanocomposite packaging on the quality and formaldehyde content
of Lentinus edodes during storage. Lentinus edodes was treated by nanocomposite packaging or polyethylene (PE) packaging
at 4 ℃ for 15 days. Meanwhile, open polyethylene packaging was used as the control. Weight loss rate, respiratory
intensity, relative conductivity, soluble sugar, soluble protein, γ-glutamyl transpeptidase (GGT) activity, S-alkyl-L-cysteine
sulfoxidelyase (C-Slyase) activity, and formaldehyde of Lentinus edodes were measured at regular intervals. Results showed
that the formaldehyde content of Lentinus edodes treated by nanocomposite packaging correlated positively with the specific
activities of GGT and C-Slyase with correlation coefficients of 0.920 and 0.916 respectively. After 15 days of storage at 4 ℃,
weight loss rate, respiratory intensity, relative conductivity, GGT activity, C-Slyase activity, and formaldehyde content of
Lentinus edodes treated by nanocomposite packaging were 0.331%, 199.80 mg/(kg·h), 5.97%, 16.75 U/g, 489.86 U/g and
6.24 mg/kg, respectively, which were lower than those of ordinary polyethylene packaging,while soluble sugar and soluble
protein of Lentinus edodes treated by nano-packaging were 7.50 g/kg and 9.37 g/kg, respectively, which were increased by
12.11% and 5.40%, respectively, as compared with those of ordinary polyethylene packaging. Nano-packaging could be
superior in maintaining the quality of Lentinus edodes and controlling the content of formaldehyde.

Key words: nanocomposite packaging, Lentinus edodes, storage, formaldehyde, quality