Microorganisms has vital role in agriculture in order to promote
the exchange of plant nutrients and reduce application of chemical fertilizers
as much as possible. Plant Growth-Promoting Rhizobacteria
(PGPR) is able to exert a positive effect leading plant growth. Beneficial
plant– microbe interactions in the rhizosphere can influence plant vigor
and soil fertility [1]. These beneficial effects of PGPR have direct or
indirect performance on plants. Direct promotion of growth by PGPR
including production of metabolites that enhances plant growth such
as auxins [2], cytokinins, gibberellins and through the solubilization
of phosphate minerals [3]. Indirect growth promotion occurs via the
removal of pathogens by the production of secondary metabolites such
as hydrogen cyanide and siderophores