Table 4. Changes of browning degree (OD 420 nm) in dried mushroom by different drying methods

Drying methods		Pleurotus eryngii	Lentinula edodes GNA01	Grifola frondosa
Control		0.22±0.05^1)f2)	0.24±0.02^b	0.37±0.02^d
Sun-drying		0.43±0.03^ab	0.25±0.05^b	1.13±0.05^a
Hot-air drying	40	0.41±0.03^ab	0.22±0.08^b	0.94±0.08^b
	50	0.48±0.02^a	0.28±0.05^b	0.78±0.05^c
	60	0.31±0.06^cde	0.38±0.02^a	0.75±0.02^c
Low temperature vacuum drying	20	0.28±0.01^def	0.39±0.03^a	0.97±0.03^b
	25	0.25±0.06^ef	0.32±0.09^ab	0.86±0.02^bc
	30	0.21±0.05^f	0.32±0.02^ab	0.85±0.09^bc
Heat pump dehumidifying drying	30	0.28±0.02^def	0.31±0.01^ab	0.76±0.03^c
	40	0.28±0.07^def	0.31±0.03^ab	1.16±0.01^a
	50	0.35±0.03^bcd	0.40±0.06^a	1.18±0.06^a
Freeze drying		0.13±0.02^f	0.32±0.08^ab	0.87±0.08^bc

¹⁾All values represent mean±SD.
²⁾Means with different letters (^a-f) with in a column are significantly different (p<0.05).