Potential of Bacillus sp. from Kebun Raya Liwa as a Producer of Indole Acetic Acid (IAA) Hormone

Kebun Raya Liwa’s soil has the potential to allow for a population of microorganisms such as Bacillus sp. Liwa are known produce phytohormones that have help plant growth and development, one which is hormone Indole Acetic Acid (IAA). This study aims determine from Rawa in producing IAA hormones. The research method included taking samples, preparing Nutrient Agar (NA) medium, measuring pH isolating bacteria, purifying characterizing sp., standard curves, testing potency production was carried out two ways, namely content with addition tryptophan without tryptophan. concentration measured using spectrophotometer wavelength 520 nm. data obtained presented tabular form. isolation results 10 isolates were able highest isolate BP 5 1.18 ppm, 13 3.90 ppm. indicates rhizosphere can