Potential of isolated bacteria biostimulant from soil roots on white turmeric plants (Curcuma zedoaria)

Abstract

The abundance of microbes around the roots of plants is an interesting thing where there is an interaction between plants and surrounding microbes. The purpose of this study was to obtain rhizosphere isolates from the soil of white turmeric roots, to determine the potential activity of rhizosphere bacteria from white turmeric as a biostimulating agent and biofertilizer agent that can help plant growth. The research method used was screening for potential growth hormone-producing bacteria (biostimulants), nitrogen fixation ability, enzyme production (protease, amylase, catalase) and biocontrol and bacterial colony PCR. The results showed that twelve rhizosphere bacteria isolates from white turmeric were isolated. Rhizosphere bacteria have the potential as a biostimulant agent, multipotential agent (biofertilizer agent, biodegradation agent and biocontrol agent) which is useful for helping plant growth, especially white turmeric plants. The twelve bacteria that had PCR amplification of the 16 S rRNA gene were performed, the results showed that the DNA bands could be continued for further identification. The results of the study by utilizing the potential of rhizosphere bacteria which have commercial value to be promoted into a safe and multi-functional biostimulant product based on superior isolates to support plant growth, especially white turmeric plants.