Exploring the impact of apocarotenoids on pathogenic Fusarium oxysporum f.sp. lini and endophytic Fo47 strains

The Fusarium oxysporum species complex (FOSC) contains highly specific plant pathogens and some nonpathogenic strains, such as Fo47. Our work concentrated on F. oxysporum f.sp. lini (Foln), the specific flax pathogen and the endophytic strain F. oxysporum 47 (Fo47), which is suggested to have a protective effect on flax against pathogens. We investigated the effects of apocarotenoids, including ionones and abscisic acid (ABA), on the growth and development of these fungal strains, assessing the potential fungicidal properties of these compounds and comparing the responses of the fungi. The study demonstrated that ionones significantly inhibited mycelial growth in both Foln and Fo47 strains. Our results also showed the differences in apocarotenoid's effect on studied strains in regard of sporulation, FUB genes cluster activity and fusaric acid (FA) production.