Impact of rhizobacterium Bacillus sonorensis on propagation of Abelmoschus esculentus and its antimicrobial activity

Abstract

In order to evaluate the impact of Bacillus sonorensis on propagation of Abelmoschus esculentus and its antimicrobial activity was investigated. In the present study, A. esculentus was cultivated in B. sonorensis inoculated soil and also assessed the morphological as well as biochemical parameters of crops. The culture inoculum of B. sonorensis influenced growth and yield of treated plant. The root (39.5 cm), shoot length (20 cm), chlorophyll (1.06 mg), carotenoid (0.445 mg), protein and total soluble sugar content, NR & starch activity were higher in bioinoculated treated plant than control. The fresh biomass and dry weight were drastically increased in bioinoculated plants when compared to control. Gradual increase in composition of pivotal nutrients (N, P, K) and minor nutrients were observed in the bioinoculated plants. The culture filtrate possessed phytopathogenic activity against different phytopathogens. Among the three different phytopathogens, the maximum zone of inhibition (21 mm) was noticed in Aspergillus colletotrichum infected plants. The fermentation study was carried out in pilot scale fermentor and the synthesis of plant growth promoting substance was found to be 30.00 mg/l IAA.

Keywords

• IAA
• PGPR
• Chlorophyll
• Carotenoid
• Starch
• Soluble sugar