Effects of Nutrients in Substrates of Different Grains on Aflatoxin B₁ Production by Aspergillus flavus

Table 2

Starch, trace element, soluble sugar, and amino acid contents of different substrates.

Nutrients	Defatted soybean	Defatted peanut	Defatted wheat	Defatted corn	Defatted corn endosperm	Defatted corn germ
Starch content (%)
Starch	5.26 ± 0.94	7.01 ± 0.71	67.22 ± 2.87	72.21 ± 1.97	82.19 ± 1.11	28.12 ± 0.76
Trace elements contents (mg/kg)
Copper	25.33 ± 9.41	34.63 ± 2.44	12.12 ± 1.90	6.89 ± 0.35	6.79 ± 1.70	19.86 ± 3.21
Iron	93.47 ± 0.22	64.18 ± 7.68	83.97 ± 8.51	21.95 ± 4.15	6.23 ± 3.36	145.05 ± 11.31
Zinc	51.90 ± 4.07	84.40 ± 10.88	39.14 ± 3.23	18.96 ± 1.52	12.47 ± 0.91	107.47 ± 1.94
Manganese	36.19 ± 0.65	59.86 ± 1.92	60.30 ± 0.15	5.28 ± 0.18	2.13 ± 0.22	30.54 ± 0.27
Soluble sugar concentrations (mg/g)
Fructose	3.89 ± 1.65	11.12 ± 2.06	1.94 ± 0.06	7.72 ± 0.18	1.88 ± 0.24	9.67 ± 2.65
Glucose	1.61 ± 0.52	4.92 ± 1.12	4.01 ± 0.13	4.95 ± 0.12	7.21 ± 0.07	13.75 ± 4.27
Sucrose	31.17 ± 5.05	32.5 ± 0.46	2.24 ± 0.12	2.15 ± 0.33	5.07 ± 0.1	42.36 ± 9.19
Maltose	0.63 ± 0.14	0.54 ± 0.07	4.10 ± 0.35	4.05 ± 0.35	7.96 ± 0.60	1.66 ± 0.28
Raffinose	3.32 ± 0.41	2.08 ± 0.27	3.00 ± 0.05	1.11 ± 0.17	1.16 ± 0.03	10.71 ± 2.62
Stachyose	34.71 ± 7.39	6.78 ± 0.98	0.36 ± 0.06	ND	ND	0.72 ± 0.10
Amino acid contents (%)
Aspartic acid	6.3 ± 0.38	7.70 ± 0.23	0.74 ± 0.04	0.54 ± 0.01	0.51 ± 0.15	1.81 ± 0.05
Glutamic acid	10.56 ± 0.57	13.89 ± 0.39	4.56 ± 0.24	1.72 ± 0.01	1.93 ± 0.20	3.33 ± 0.05
Glycine	2.46 ± 0.10	3.35 ± 0.15	0.55 ± 0.03	0.34 ± 0.00	0.30 ± 0.02	1.16 ± 0.02
Arginine	3.81 ± 0.18	6.95 ± 0.18	0.65 ± 0.04	0.43 ± 0.00	0.37 ± 0.03	1.73 ± 0.04
Alanine	2.58 ± 0.11	2.97 ± 0.06	0.51 ± 0.03	0.61 ± 0.01	0.66 ± 0.01	1.37 ± 0.01
Protein level	45.11 ± 2.53	55.45 ± 1.82	12.25 ± 0.37	8.36 ± 0.09	8.60 ± 1.20	19.47 ± 0.42

Means within rows followed by the same letter are not significantly different at according to Duncan’s multiple range test ().