Controlling Mosaic Disease (Cucumber Mosaic Virus) on Chili with IAA-producing bacteria

Once of the main diseases of the chili is Cucumber Mosaic Virus (CMV). The utilization of indole acetic acid (IAA)-producing rhizobacteria can be used to increase plant growth and resistance from plant pathogen. The aim of this study was to determine the effectiveness of IAA- producing rhizobacteria in increasing the growth of chili in greenhouses, and to determine the effectiveness of rhizobacterial in increasing chili plant resistance against Cucumber mosaic virus (CMV). Identification of compounds in chili leaves that infected with CMV was carried out to determine the effectiveness of rhizobacteria in inducing plant resistance. Compound analysis was carried out using Gas Mass Chromatography Spectroscopy (GCMS). The effectiveness of rhizobacteria in increasing plant growth and resistance was conducted in a greenhouse. Results of the study showed that all the rhizobacterial isolates (Stenotrophomonas maltophilia Sg3, Enterobacter asburiae MjSg48, Enterobacter asburiae TulKc24, and Klebsiella varicola TulKc2c) were effective in increasing plant height, leaf number, and leaf chlorophyll content. All rhizobacterial isolates were effective in increasing plant resistance as indicated by reduction of disease severity. Analysis of the chili leaves compounds content showed that all isolates were able to induce plant resistance to CMV by forming antiviral compounds namely Cytidine, Quinic acid, 3-Quinolinecarboxylic acid, Naphtalene sulfonic acid,  and Bicyclo heptan-2-one.