Title Effects of plant growth regulators on physiological and phytochemical parameters in medicinal plants under stress conditions Type of Research Book Keywords PGPR, Environmental stress, Medicinal Plants Abstract Effects of plant growth regulators on physiological and phytochemical parameters in medicinal plants under stress conditions Researchers Hamid Mohammadi (First Researcher)، Saeid Hazrati (Second Researcher)، Mehrnaz Hatami (Third Researcher)