ABSTRACT
Abiotic stresses such as drought, salinity, heat, cold, flooding, xenobiotics and UV radiation cause a major decline in plant yield at global level. Phytohormones have a vital role in the ability of plants to acclimatize to harsh environments. They regulate plant growth, development and various other metabolic processes in plants during abiotic stresses. The use of various phytohormones such as abscisic acid, cytokinin, brassinosteroids, salicylic acid, jasmonic acid, and auxin has great significance during environmental stresses. Phytohormones interact with one another and are involved in multiple responses under stress conditions, and their crosstalk results in synergistic or antagonistic interactions. Recently, metabolic engineering techniques have proved to be a boon in the generation of abiotic stress-tolerant crops by engineering phytohormone synthesis.
