Plant Growth Regulators and Improvements in Phytoremediation Process Efficiency Studies on Metal Contaminated Soils

Plant growth regulators (PGRs) are organic compounds that in small amounts alter the growth of a plant or plant part. The term PGR includes naturally occurring plant growth substances, phytohormones, as well as synthetic compounds or chemical analogies. PGRs affect flowering, aging, root growth, distortion and killing of leaves, stems, and other parts, prevention or promotion of stem elongation, color enhancement of fruit, prevention of leafing and/or leaf fall, among others. They act as plant hormones would do; interacting with the plant's physiological processes