Evaluating the Antagonistic Potential of Bacteria on Sclerotinia Slerotiorum, Causal Agent of White Mould of Carrots

Abstract

Disease suppressive composts are known to contain beneficial bacteria that can be antagonistic to plant pathogens. This research evaluated whether Sclerotinia sclerotiorum -commonly known as white mould disease -can be managed using antagonistic bacteria from forestry compost. In vitro and in vivo experiments demonstrated that bacteria from the Pseudomonas and Bacillus genera can inhibit mycelial growth and reduce white mould disease. Extraction of culture filtrates and isolation procedures were performed to identify potential bioactive compounds. Three cyclodipeptides were purified and characterized from culture filtrates of Pseudomonas arsenicoxydans (F9-7

Identification and genomic characterization of Pseudomonas spp. displaying biocontrol activity against Sclerotinia sclerotiorum in lettuce

“…The P. mandelii subgroup has been better characterized than the P. asplenii one and contains multiple strains of biocontrol interest (Höfte, 2021). Only one of these strains, Pseudomonas arsenicoxydans F9-7, has been previously shown effective against S. sclerotiorum (Meyer, 2022). Finally, the P. protegens subgroup is well known for containing Genomic atlas of 9 Pseudomonas strains antagonistic to S. sclerotiorum (colored) and 35 non-antagonistic ones (non-colored).…”