Plants face numerous abiotic stresses like drought, heat, salinity, nutrient deficiencies, etc., which can negatively influence their growth and yield. To address the above challenges, plants utilize a range of defense strategies that fall into morphological, physiological, biochemical, and molecular categories. Key adaptations involve physiological responses such as osmotic regulation to preserve cellular integrity under stress, the synthesis of protective metabolites, and enhanced root structure development to improve water and nutrient absorption. Biochemically, the synthesis of protective compounds such as antioxidants, osmoprotectants, and stress-associated hormones plays a key role in reducing damage caused by these stressors and regulating the plant’s response. Furthermore, molecular responses, including the initiation of stress-associated genes and signaling pathways, are essential in coordinating these defenses. Additionally, secondary metabolite synthesis contributes to defensive responses against oxidative stress, boosting overall plant resilience. Understanding the complex interplay among these mechanisms can provide insights into how plants maintain balance and increase resilience, which is vital for adapting to changing environments. Investigating these defense mechanisms is crucial for the development of crop varieties that are capable of surviving against biotic stress, mainly the challenges of climate change effects and declining natural resources. This chapter brings together recent research efforts focused on elucidating tolerance against abiotic stress. Insights gained from this chapter will provide valuable knowledge in addressing the challenges posed by the abiotic stresses and improving the sustainability of agriculture to face the effects of climate change.