Drought Stress: Impact on Plant Growth and Survival

Drought stress poses a significant threat to plant growth, with the direct impact of drought being termed 'osmotic stress'. Plants are highly vulnerable to water deficits, which can cause severe harm. The effects of osmotic stress on plant morphology and structure include wilting, as well as leaf shrinkage and yellowing. Continued osmotic stress can lead to changes in enzyme structures and activities, resulting in a decrease in photosynthetic efficiency. This impedes normal metabolism and growth, eventually leading to plant death. Throughout the growth and development process, plants are frequently exposed to a variety of biotic and abiotic stresses, including pathogens, drought, salinity, extreme temperature, and heavy metals. However, plants have developed a range of metabolic and physiological mechanisms to combat these stresses over the course of evolution.