Phytohormones play an important role as signals and
regulators of growth and development in plants. The capacity
to produce them is often considered as a trait of the plant
kingdom. However, production of phytohormones is also
widespread among soil and plant-associated prokaryotes
(Costacurta and Vanderleyden, 1995). The production of
phytohormonal substances such as auxins and gibberellins by