EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
SESSION 3: PATHOGENESIS – EPIDEMIOLOGY AND POPULATION<br />
GENETICS<br />
P64 - Plant pathogenic fungal interactions in oats<br />
A.-K. Kolseth, P. Persson<br />
Swedish University <strong>of</strong> Agricultural Sciences, Department <strong>of</strong> Crop Production Ecology, P.O. Box 7043,<br />
SE 750 07 Uppsala, Sweden<br />
E-mail: anna-karin.kolseth@slu.se<br />
In Sweden 20% <strong>of</strong> all the small grain cereals cultivated is oats, a crop that up until<br />
now has been considered to be at good break crop in crop rotations including<br />
other small grain cereals. In recent years cereal infections with Fusarium<br />
langsethiae and F. graminearum in oats have been severe and problematic for<br />
the farmers, mainly lowering the quality <strong>of</strong> the yield through mycotoxin production.<br />
F. langsethiae is found more <strong>of</strong>ten in oats than other cereals while F.<br />
graminearum has not been considered a problem in oats until the last years. The<br />
main objective <strong>of</strong> the presented study was to learn more <strong>of</strong> the biology <strong>of</strong> F.<br />
langsethiae. The experiment was designed to study under which environmental<br />
conditions F. langsethiae spreads to new plants and within plants during the<br />
vegetation period, and which <strong>of</strong> the plant developmental stages are most sensitive<br />
to infection by F. langsethiae. An additional objective was to study how F.<br />
langsethiae interacts and perform together with the two other common species<br />
found in Sweden, F. graminearum and F. culmorum.<br />
Analyses <strong>of</strong> plants reveal no detectable endophytic infection <strong>of</strong> F. langsethiae<br />
suggesting it has an epiphytic life style. Its pattern <strong>of</strong> infection also confirms it<br />
being a minor pathogen, since it did not cause early plant death, which, in<br />
comparison, both F. graminearum and F. culmorum did. In addition, F.<br />
langsethiae seem to hamper the infection <strong>of</strong> F. graminearum, either by direct<br />
competition or by triggering the immune response in oats or a combination <strong>of</strong> the<br />
two.<br />
Keywords: Gibberella zeae, perithecia, ascospores<br />
157