Fungal strains of the genus Trichoderma are widely used in agriculture as biological disease control agents, due to their ability to suppress pathogens and stimulate plant growth. Identification of new strains with valuable biosynthetic properties is a topic of major interest for the scientific community, having direct implications in the development of sustainable agricultural biotechnologies. In this work was tested strain Trichoderma atrobruneum CNMN FD 25, applied on wheat and triticale grains. The results showed a significant incentive effect on the development of the root system, and to a lesser extent - on the aerial growth of plantlets. Treatment of wheat seeds with biopreparations in concentrations of 0.5 % and 0.33 % led to an increase in the germination rate by 6 %, the length of the plantlets by 12.6 %, the mass of the plantlets by 8.6 %, and the root mass by 23.7 %. In the case of triticale, the same concentrations resulted in an increase in the germination rate by 16 %, in the length of the plantlets by 15 %, in the mass of the plantlets by 7 % and in the root mass by 32 %.
These results confirm the biostimulant potential of the T. atrobruneum CNMN FD 25 strain, in particular through its influence on the development of the root system.