Table 3.

Contents of organic acids of L. edodes harvested in different culture substrate.

Organic acids	Control	RS20	RS40	RS60	RS80
Tartaric acid	2.79 ± 0.07 a	2.78 ± 0.05 a	2.69 ± 0.17 a	2.00 ± 0.12 b	1.97 ± 0.25 b
Malic acid	18.81 ± 0.32 cd	18.35 ± 0.82 d	19.50 ± 0.24 c	23.75 ± 0.84 a	21.74 ± 0.37 b
Ascorbic acid	1.80 ± 0.40 a	1.89 ± 0.16 a	1.26 ± 0.03 b	0.98 ± 0.04 bc	0.81 ± 0.02 c
Acetic acid	20.64 ± 4.91 a	22.09 ± 2.12 a	25.19 ± 0.52 a	8.79 ± 1.78 b	5.91 ± 1.04 b
Citric acid	2.26 ± 0.32 b	2.90 ± 0.63 ab	2.97 ± 0.17 ab	3.48 ± 0.56 a	2.73 ± 0.27 ab
Fumaric acid	4.23 ± 0.02 d	3.62 ± 0.02 e	5.20 ± 0.04 c	8.23 ± 0.30 a	7.26 ± 0.07 b
Succinic acid	11.31 ± 2.65 a	8.81 ± 3.10 a	7.95 ± 3.20 a	1.86 ± 0.32 b	1.25 ± 0.05 b
Total	61.84 ± 7.66 a	60.43 ± 5.98 a	64.76 ± 3.95 a	49.09 ± 2.93 b	41.67 ± 0.48 b

Values (mg/g dry weight) are the means ± SD (n = 3). Means with different letters within a row are significantly different (P < 0.05).