ABSTRACT
Gibberellins (GAs) are carboxylic acids, also adorned as important phytohormones that positively regulate the germination, leaf expansion, stem elongation, flowering, and fruit set. Among 136 different GA molecules only GA1, GA3, GA4 and GA7 are bioactive. These bioactive GAs play crucial roles in response to abiotic stresses including cold, salt, heat, and osmotic stress. The hypo-synthesis of GAs with the application of plant growth retardants restricts the physiological progress to alleviate the oxidative damage of plant cells from various stress exposure is becoming increasingly evident. In contrast, hyper-synthesis of GAs with good signalling accelerates the growth in plants that helps them to escape from shading and submergence. Here, we discuss the role of GAs in plants towards various abiotic stress responses along with their biosynthesis and the regulation of signalling pathway to stress protection in detail.
