TABLE 4.
Aflatoxin production by four Aspergillus section Flavi species with S-morphology from the United States in maize.
| Species | Aflatoxins | Isolate | State, region, source |
Total Aflatoxin (μg kg–1) |
|||
| 25°C | 30°C | 35°C | 40°C | ||||
| A. flavus S-morphotype | B1, B2 | AF70 | AZ, Yuma, soil | 1,849 | 313,371 | 530,896 | 4,119 |
| GNFHP4 C | AL, Morgan, maize | 1,211 | 103,266 | 306,738 | 14,118 | ||
| E2-H | TX, San Patricio, soil | 751 | 131,868 | 189,690 | 4,282 | ||
| JBABJB E | GA, Bryan, maize | 797 | 103,421 | 399,681 | 3,558 | ||
| Mean | 1,152 | 162,981 | 356,751A | 6,519A | |||
| A. Agricola | B1, B2 | NRRL 66869 | TX, Coastal Bend, soil | 1,021 | 141,992 | 67,155 | 72 |
| J55-H | TX, Gregory, soil | 1,860 | 159,572 | 119,737 | 38 | ||
| NRRL 66872 | TX, Bee, maize | 944 | 37,092 | 31,649 | 45 | ||
| BC09-F | TX, Bexar, maize | 1,492 | 174,615 | 166,208 | 241 | ||
| Mean | 1,329 | 128,318 | 96,187B | 99B | |||
| A. texensis | B1, B2, G1, G2 | NRRL 66855 | TX, Ellis, soil | 664 | 262,663 | 72,274 | 41 |
| NRRL 66856 | TX, Fort Bend, maize | 1,225 | 191,641 | 74,453 | 16 | ||
| NRRL 66859 | AR, Greene, maize | 1,041 | 170,988 | 63,677 | 28 | ||
| J35-E | TX, San Patricio, soil | 843 | 301,667 | 58,245 | 21 | ||
| Mean | 943 | 231,740 | 67,162B | 26B | |||
| A. toxicus | B1, B2 | J15-B | TX, Gregory, soil | 596 | 167,163 | 80,555 | 19 |
| CR20-D | TX, Coastal Bend, soil | 1,375 | 246,556 | 95,029 | 24 | ||
| BRG3458 H | LA, Franklin, maize | 542 | 190,850 | 186,866 | 33 | ||
| VC8-L | TX, Calhoun, maize | 648 | 54,657 | 26,735 | 21 | ||
| Mean | 790 | 164,807 | 97,296B | 24B | |||
Total aflatoxin concentrations were compared between species at each temperature. Mean aflatoxin concentrations are averages of results from four isolates. Means followed by different upper-case letters within a column differ significantly according to Tukey’s HSD (p < 0.01). Means within a column lacking a letter do not differ (ANOVA, p > 0.05).