Table III. Actual and predicted metabolic responses of maize leaves to DS, HS, and DS+HS in 2010
MetaboliteDSaHSaDS+HSaPredictedbrc
Ala0.703 ± 0.0980.625 ± 0.1130.928 ± 0.1411.379 ± 0.1930.78
Asn1.147 ± 0.2230.357 ± 0.3101.887 ± 0.4751.442 ± 0.4570.64
Asp−0.344 ± 0.2280.129 ± 0.157−0.135 ± 0.183−0.428 ± 0.2940.40
Benzoate0.103 ± 0.0770.142 ± 0.0780.500 ± 0.0660.234 ± 0.1410.50
β-Ala1.059 ± 0.0950.980 ± 0.1981.406 ± 0.2212.035 ± 0.2530.76
Erythritol−0.477 ± 0.145−1.847 ± 0.229−1.109 ± 0.161−2.224 ± 0.3650.45
Fru−0.035 ± 0.0670.101 ± 0.0610.049 ± 0.0530.067 ± 0.1270.69
Fumarate−0.062 ± 0.123−0.097 ± 0.087−0.171 ± 0.080−0.220 ± 0.1990.18
Glycerol-3-P1.612 ± 0.4540.855 ± 0.5531.436 ± 0.3624.014 ± 0.8530.98
GABA1.023 ± 0.1620.957 ± 0.1451.011 ± 0.1641.973 ± 0.2660.41
Galactinol0.706 ± 0.1240.227 ± 0.0821.164 ± 0.1091.027 ± 0.1700.75
Glu0.004 ± 0.1430.627 ± 0.2220.814 ± 0.2090.555 ± 0.3150.73
Glycerate0.098 ± 0.115−0.389 ± 0.109−0.147 ± 0.137−0.268 ± 0.1990.69
Glycerol0.271 ± 0.099−0.882 ± 0.128−0.516 ± 0.070−0.560 ± 0.2120.18
Gly1.129 ± 0.1030.760 ± 0.2162.032 ± 0.2771.909 ± 0.2470.43
Homo-Ser0.957 ± 0.1040.220 ± 0.1101.272 ± 0.1801.171 ± 0.174−0.15
Ile2.328 ± 0.146−0.319 ± 0.1351.988 ± 0.2532.008 ± 0.2190.01
Itaconate−0.138 ± 0.1460.125 ± 0.1981.128 ± 0.1100.036 ± 0.3020.42
Malate0.417 ± 0.116−0.662 ± 0.168−0.573 ± 0.162−0.296 ± 0.2060.63
Maltitol−0.494 ± 0.178−0.277 ± 0.146−1.093 ± 0.184−0.956 ± 0.2550.66
Maltose0.022 ± 0.244−1.181 ± 0.156−0.497 ± 0.182−1.274 ± 0.3400.71
Myoinositol0.620 ± 0.0830.445 ± 0.0841.067 ± 0.0981.056 ± 0.1560.37
Nicotinate0.264 ± 0.092−0.020 ± 0.1220.517 ± 0.1170.178 ± 0.215−0.02
Octadecanoate0.108 ± 0.0870.162 ± 0.1380.204 ± 0.1100.263 ± 0.1870.40
Phe2.467 ± 0.1780.266 ± 0.1112.355 ± 0.2362.785 ± 0.241−0.43
Phosphate−0.213 ± 0.097−0.299 ± 0.141−0.134 ± 0.135−0.535 ± 0.1940.36
Pro1.897 ± 0.2690.311 ± 0.1821.365 ± 0.2651.968 ± 0.4050.38
Putrescine0.198 ± 0.124−0.195 ± 0.1340.001 ± 0.1160.094 ± 0.2360.60
Pyro-Glu0.389 ± 0.1340.568 ± 0.1490.899 ± 0.2361.003 ± 0.2540.59
Raffinose0.482 ± 0.0970.704 ± 0.1140.402 ± 0.1131.149 ± 0.182−0.04
Ser0.834 ± 0.1100.570 ± 0.1391.202 ± 0.2041.435 ± 0.2080.60
Succinate0.513 ± 0.1850.524 ± 0.0710.364 ± 0.1221.134 ± 0.1910.21
Threonate0.356 ± 0.0900.595 ± 0.0860.480 ± 0.0890.954 ± 0.1610.76
Thr1.321 ± 0.1050.414 ± 0.1401.359 ± 0.2131.728 ± 0.1920.44
Trehalose−1.083 ± 0.240−1.790 ± 0.243−1.641 ± 0.230−2.746 ± 0.4510.70
Trp2.874 ± 0.269−0.940 ± 0.3371.961 ± 0.4031.985 ± 0.5670.46
Tyr1.988 ± 0.1480.186 ± 0.1541.307 ± 0.2432.135 ± 0.2570.50
Urea0.624 ± 0.1080.874 ± 0.1441.026 ± 0.0991.548 ± 0.2150.36
Val1.913 ± 0.127−0.014 ± 0.1391.798 ± 0.2381.912 ± 0.2000.06
Xylitol0.009 ± 0.0150.025 ± 0.019−0.087 ± 0.0140.038 ± 0.0250.69
Xyl−0.140 ± 0.0560.176 ± 0.078−0.197 ± 0.0610.072 ± 0.1060.26
  • a Response factors showing log2 fold change in the metabolite level against the WW condition. Values are means ± se (n = 20).  bPredicted response factors to DS+HS are sums of those to individual DS and HS. Values shown in boldface are significantly different from actual response factors in Student’s t test (P < 0.05).  cCorrelation coefficients between actual and predicted response factors. Values shown in boldface are correlations at P < 0.05.