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Abstrakt
TELLURIC PSEUDOMONADS METABOLITES INVOLVED IN THE ANTAGONISM TO PHYTOPATHOGENIC FUNGI
Samia Mezaache-Aichour, Nora Haichour, Abdelhadi Guechi & Mohamed M. Zerroug
Fourteen fluorescent Pseudomonas spp. potentially produce secondary metabolites involved in antagonistic activity. Among the produced secondary metabolites, some substances, as siderophores, hydrolytic enzymes and HCN with antibiotic activity provides a major advantage in the microbial antagonism to the producing strain. All strains synthesized siderophores, some strains have a single type of siderophore, while others have several siderophores. Production of proteolytic enzymes (which may be involved in parasitism) was found in only three of the strains studied. While Cyanogenesis, was found in four strains. This metabolite is a product of secondary metabolism, which may benefit the production strains in the rhizosphere microbial communities. These features, in addition to those mentioned above, could benefit the strain in its competition and its antagonistic activity in diverse ecosystems