With an ever-increasing demand for more food supply, agricultural
scientists will have to search for new ways and technologies to promote
food production. In recent decades, plant growth regulators (PGRs) have
made great strides in promoting plant growth and development. PGRs are
organic compounds which have the ability to dramatically affect
physiological plant processes when present in extremely low
concentrations (in the range of micro-to picograms). Although all higher
plants have the ability to synthesize PGRs endogenously, they do respond
to the exogenous sources most likely due to not having the capacity to
synthesize sufficient endogenous phytohormones for optimal growth and
development under given climatic and environmental conditions. In recent
years, PGRs have established their position as a new generation of
agrochemicals after pesticides, insecticides and herbicides. Interest in
the commercial use of PGRs for improving plant growth and crop yields is
also increasing because of their non-polluting nature. The use of PGRs
in the post-harvest technology is well established and many new
breakthroughs have recently been revealed.