Characterization of plant growth promotion and disease control trends of rhizobacteria isolated from Umorok (Capsicum chinense)

Abstract

The aim of the study is to identify and characterize the rhizosphere bacteria of King Chili locally known as Umorok plant (Capsicum chinense) and evaluates their plant growth promotion and defense from pathogens. A total of 300 rhizobacteria were isolated from three different growth stages of king chili viz.; juvenile, flowering and fruiting growth stages and characterized to establish the beneficial role. Nevertheless, the isolated microorganisms were evaluated for their in-vitro plant growth promotion potential by performing biochemical tests and pathogen antagonistic activities by dual culture methods. Out of the total isolates, 10 potential rhizobacteria were selected for pot culture experiment based on their multiple Plant Growth Promoting Rhizobacteria (PGPR) and biocontrol activity. Since these inoculants exhibited multiple trait benefits to the host plant, they can be adapted as potential bio-inoculant consortia for plant health improvement and disease control to increase Umorok productivity.