Abscisic acid was found for its role in controlling abscission and dormancy, but it also has other broad impacts on plant growth and development, as do other plant growth regulators.
It functions as a general plant growth inhibitor as well as a plant metabolism inhibitor.
Abscisic acid prevents seed germination.
Abscisic acid induces the closing of stomata in the epidermis and boosts a plant's tolerance to diverse stressors. As a result, it is sometimes referred to as the stress hormone Abscisic acid is essential for seed growth, maturity, and dormancy.
Abscisic acid (ABA), a plant hormone, modulates drought stress responses by modulating stomatal closure and thereby lowering transpiration water loss. Exogenous ABA treatments prevent wilting and allow plants to withstand brief bouts of severe drought.