The phytopathogenic bacterium Pseudomonas syringae pv. savastanoi elicits aerial tumors on olive plants and is also able to synthesize large amounts of auxins and cytokinins. The auxin indoleacetic acid was shown to be required for tumorigenesis. but there is only correlational evidence suggesting a role for cytokinins. https://www.incredibleindiatourtravels.com/