Trichothecene content of rye and wheat genotypes inoculated with a deoxynivalenol- and a nivalenol-producing isolate of Fusarium culmorum

Publikations-Art

Zeitschriftenbeitrag

Autoren

Miedaner, T. and Reinbrecht, C.

Erscheinungsjahr

2001

Veröffentlicht in

J. Phytopathology

Band/Volume

149/

Seite (von - bis)

245-251

Head blight caused by Fusarium culmorum may lead to yield reduction and the contamination of cereal grain with the mycotoxins deoxynivalenol (DON), 3-acetyl deoxynivalenol (3-ADON), nivalenol (NIV), fusarenone-X (FUS), and others. In this study, we analyzed the covariation between DON and NIV accumulation of 12 rye and 8 wheat genotypes differing in resistance by inoculating them with a DON- and a NIV-producing isolate, respectively, in three locations. The resistance traits head blight rating and plot yield relative to the non-inoculated plots of the same genotype were assessed and the contents of DON, 3-ADON, NIV, and FUS in the grain were analyzed by gaschromatography with mass spectrometry (GC MS). The NIV-producing isolate was significantly (P=0.05) lower aggressive and lead to a considerably lower mean NIV content in the grain compared to the aggressiveness and mean DON content of the DON-producing isolate (19.5 mg NIV kg-1 grain vs. 48.4 mg DON kg-1). Wheat and rye genotypes significantly differed for their DON and NIV accumulation. All genotypes reacted similar to both chemotypes of F. culmorum for the resistance traits and the respective mycotoxin contents with the exception of one wheat variety, that caused a change in rank order for mycotoxin content. In conclusion, resistance to head blight and tolerance to mycotoxin accumulation seems to be most likely the same for DON- and NIV-producing isolates of F. culmorum.