Effect of PGPR on Fusarium oxysporum f.sp. lycopersici infection through Elicitation of Defense Enzymes

Seed treatment, soil application and ST+SA of plant growth promoting rhizobacterial strains viz. Pseudomonas fluorescens Pf-04 strains on tomato induced synthesis of Peroxidases (PO) and Polyphenol oxidases (PPO) when challenge inoculated against Fusarium oxysporum f.sp. lycopersici. All the treatments increased PO and PPO activities when compared to control. Thus, the investigation suggested that seed treatment and soil application were effective methods and could be used to manage diseases under field conditions. Further, maximum enzyme activity was observed after 48 hrs. All the methods of application of Pseudomonas strains was suggestive of induced systemic resistance.