Desjardins AE, Maragos CM, Proctor
RH.
Maize ear rot and moniliformin
contamination by cryptic species of Fusarium subglutinans.
J Agric Food Chem. 2006 Sep 20;54(19):7383-90.
Mycotoxin Research, National Center for Agricultural
Utilization Research, Agricultural Research Service, US
Department of Agriculture, 1815 North University Street, Peoria,
Illinois 61604, USA.
Fusarium subglutinans causes maize ear rot and contaminates
grain with the mycotoxin moniliformin. Previous DNA sequence
analysis divided F. subglutinans from maize into two cryptic
species, designated groups 1 and 2. Here, it was determined
whether the two groups differ in the agriculturally important
traits of virulence on maize and moniliformin production in
planta. Thirty-seven strains from U.S. maize were assigned to
groups 1 and 2 by DNA sequence analysis. In field tests, all
strains were highly virulent on maize inbred B73 and four maize
hybrids. In planta, 82% of group 1 strains and 25% of group 2
strains produced high levels (100-1500 microg/g) of
moniliformin. All group 2 strains from more northern states
produced little or no moniliformin (0-5 microg/g). These data
indicate that moniliformin production is highly variable in F.
subglutinans from U.S. maize and that production may not be
required for the fungus to cause maize ear rot.
PMID: 16968109
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