Characterization and Potential of Plant Growth-Promoting Rhizobacteria (PGPR) Isolates Capacity Correlating with Their Hydrocarbon Biodegradation Capability

The aim of this research is to find the characteristics three PGPR isolates—Azospirillum sp., Bacillus and Pseudomonas sp.: First, by profiling their in a liquid bioremediation system secondly measuring performance as bioagent soil phytoremediation using ramie plant (Boehmia niviea L.). A Randomized Block Design triplicate used: (1) Nitrogenfree medium with mineral media containing 1% (wt/v) petroleum hydrocarbons; (2) glucose control. We tested petroleum-degrading capacity, nitrogenase activity, phytohormones production, growth. results showed that both sp. (98.7%, 81.78% degradation efficiency) Azospirillum (93.80%, 83.70%) were superior candidate systems. They show reduced but adequate phytohormone managing improve Both also sufficient nitrogen fixing capabilities hydrocarbon activity effectively. Meanwhile, has lowest biodegradation (84.07%; 78.6%) while failing Therefore would be more beneficial bacterial consortium where its (high IAA production) can coupled other isolates offset lack or activity.