Effect of incubation temperature on zearalenone production by strains ofFusarium crookwellense

✍ Scribed by Margaret E. Menna; Denis R. Lauren; Wendy A. Smith

• Book ID: 104772569
• Publisher: Springer Netherlands
• Year: 1991
• Tongue: English
• Weight: 349 KB
• Volume: 116
• Category: Article
• ISSN: 0301-486X
• DOI: 10.1007/bf00436369

✦ Synopsis

After 6 weeks incubation on rice 2 strains of Fusarium crookwellense produced more zearalenone (6060-5010 mg/kg dry wt of culture) at ambient temperature (16-29 degrees C) in daylight than at ambient temperature (18-23 degrees C) in darkness or at controlled temperatures of 11 degrees C, 20 degrees C or 25 degrees C in darkness. Yields at 25 degrees C were low. Incubation at 11 degrees C during the second 3 weeks incubation increased yields only when preliminary incubation had been at 25 degrees C. After 6 weeks incubation at controlled temperatures in darkness, 4 strains produced most zearalenone at 20 degrees C (2460-21 360 mg/kg), 1 strain at 11 degrees C (6570 mg/kg). Yields at a temperature oscillating daily from 10-20 degrees C were less than at 15 degrees C. One of the 5 strains produced appreciable amounts of a-zearlaenol (1645 mg/kg at 20 degrees C) and 2 of nivalenol (340 and 499 mg/kg at 20 degrees C).