Ascomycetic fungi of the genus Fusarium are one of the main pests of crops. Fusarium graminearum creates fusarium spike, not only destroying it but also producing toxins from the group of trichothecenes, which, among other things, inhibit protein synthesis. At the same time, trichotecenes are toxic to humans and animals, therefore, such wheat should not be used as food.
In some regions of Russia, Fusarium affects up to 15% of the total wheat crop. At the same time, Chinese scientists came to the conclusion that a wild relative of cultivated wheat Thinopyrum elongatum, which has natural resistance to fungus, the formation of this property was due to another fungus – Epichloe aotearoae.
Scientists could not find similar genes as in Epichloe aotearoae in the plant kingdom, so they came to the conclusion that it was this fungus that creates resistance to another Fusarium fungus. It is still unknown how this happens.