Two-dimensional environmental profiles of growth, deoxynivalenol and nivalenol production by Fusarium culmorum on a wheat-based substrate.

Abstract:

AIMS:To determine the effect of interacting conditions of water activity (aw, 0.99-0.85), temperature (15, 25 degrees C) and time (40 days) on growth and production of the mycotoxins deoxynivalenol (DON) and nivalenol (NIV) by Fusarium culmorum on a wheat-based agar medium. METHODS AND RESULTS:Fusarium culmorum grew optimally at 0.995aw and minimally at 0.90 at both 15 and 25 degrees C. No growth was observed at <0.90aw. Overall, temperature, aw and their interaction had a statistically significant effect on the growth rate of F. culmorum. Production of both DON and NIV were over a much narrower range (0.995-0.95aw) than that for growth. The highest concentrations of DON and NIV levels were produced at 0.995aw and 0.981aw at 25 degrees C, respectively, after 40 days of incubation. Statistically, aw, temperature and incubation time, and aw x temperature and temperature x incubation time had a statistically significant effect on DON/NIV production. CONCLUSIONS:This is the first detailed report on the two-dimensional environmental profiles for DON/NIV production by F. culmorum in the UK. SIGNIFICANCE AND IMPACT OF THE STUDY:As part of a hazard analysis critical control point (HACCP) approach, this type of information is critical in monitoring critical control points for prevention of DON/NIV entering the wheat production chain.

journal_name

Lett Appl Microbiol

authors

Hope R,Magan N

doi

10.1046/j.1472-765x.2003.01358.x

subject

Has Abstract

pub_date

2003-01-01 00:00:00

pages

70-4

issue

1

eissn

0266-8254

issn

1472-765X

pii

1358

journal_volume

37

pub_type

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