Table 3. Changes in polyphenol oxidase and peroxidase activities of F. velutipes during storage at 5°C, without packaging, packed corrugated packaging or Al-coated corrugated packaging (u/g/min, dw)

Oxidative enzyme	Packaging container	Storage period (week)
Oxidative enzyme	Packaging container	0	1	2	3	5	7	9
PPO activity	Control	84.14±14.16^)bcA	101.36±36.51^abA	115.11±36.39^aA	73.58±31.15^cdA	53.85±32.28^dB	31.16±12.46^eB	29.91±12.11^eC
	Corrugated packaging	84.28±14.02^cA	83.36±11.15^cA	94.95±22.14^bcA	95.13±24.21^bcA	99.72±20.44^abA	99.82±6.32^abA	108.13±21.30^aA
	Al coated-corrugated packaging	84.10±14.20^bA	86.72±11.24^abA	90.48±4.65^abA	91.27±12.34^abA	91.52±16.98^abA	92.48±11.23^aA	92.24±15.66^aB
POD activity	Control	443.38±197.04^bA	536.89±192.92^aA	552.93±141.72^aA	498.74±144.88^abA	457.54±201.85^bA	309.45±101.83^cB	147.67±60.50^dB
	Corrugated packaging	432.14±208.28^bA	459.87±104.26^bA	500.03±191.90^abA	534.59±123.86^aA	538.75±112.19^aA	545.22±152.17^aA	550.20±145.16^aA
	Al coated-corrugated packaging	441.58±198.84^aA	436.47±107.57^aA	447.44±98.69^aA	438.33±121.30^aA	440.55±75.86^aA	455.73±60.90^aA	468.55±175.76^aA

All values are mean±SD (n=5). Different superscript letters (^a-e, for the same samples at different storage periods, and ^A-C, for the samples at different packaging containers) indicate significant differences (p<0.05) by Duncan’s multiple range test.
PPO, polyphenol oxidase; POD, peroxidase.