Different techniques for concentration of extracellular biopolymers with herbicidal activity produced by Phoma sp

The Genus Phoma: A Review of Its Potential Bioactivities, Implications, and Prospects

“…The EPS were concentrated through two processes (membranes and adsorption), and it was possible to observe that the higher the concentration of EPS in the fermented broth, the greater is its bioherbicidal activity. A simultaneous decrease of surface tension values with increase of EPS concentration was observed, suggesting that the increase in bioherbicidal activity may be due to the emulsifying capacity of EPS (Luft et al 2019).…”

“…Results of the bioassays demonstrated that the bioherbicide presented activity toward Cucumis sativus, and the mode of action was based on the inhibition of carotenoid biosynthesis (Klaic et al 2017). Later, the bioherbicide production was developed by submerged fermentation and resulted in an inhibition of 100% of Bidens pilosa and A. retroflexus seeds (Todero et al 2019). The reduction of 100% on seed germination of Sorghum bicolor was also observed.…”

“…1,7-Dihydroxy-3-methyl-9,10-anthraquinone (1), 1,6-dihydroxy-3-methyl-9,10-anthraquinone (phomarin, 2), 1-hydroxy-3-methyl-9,10anthraquinone (pachybasin, 3), and 1-7-dihydroxy-3hydroxymethyl-9,10-anthraquinone (4) Orange (1,2,4), yellow (3) Borges and Pupo (2006) Phoma herbarum -Magenta Chiba et al (2006) Exopolysaccharides (EPS) are the most frequently studied fungal polysaccharides, besides cell wall polysaccharides and intracellular cytosolic polysaccharides. EPS obtained from Ascomycota fungal cultures are known for their antioxidant, immunostimulating, antitumor, and antimicrobial properties (Osińska-Jaroszuk et al 2015) and for their bioemulsifying ability (Luft et al 2019). YCP (acronym of Yancheng polysaccharide) was isolated from the mycelium of the marine filamentous fungus Phoma herbarum YS4108 (Yang et al 2005).…”