Root Exudates and Plant Abiotic Stress Tolerance

Abstract

Plant development and production are severely hampered by abiotic stresses such as salinity, temperature changes, heavy metals, nutrient inadequacies, and drought. Root exudates are a complex mixture of organic substances that are exuded by plants and are essential for regulating rhizosphere interactions and improving plant resilience to these stresses. This review summarizes current studies on how root exudates contribute to abiotic stress tolerance, with a particular emphasis on their interaction with the rhizospheric microbiome. The mechanisms by which root exudates enhance plant tolerance to diverse abiotic stresses are also explored. Under stressful conditions, root exudates modify microbial communities, foster favorable symbiotic relationships, and facilitate nutrient acquisition by plants. Despite the progress in comprehending these mechanisms, the specific chemical cues that stimulate these mutualistic relationships remain to be elucidated. Addressing these knowledge gaps is crucial to enhancing plant resilience in the face of escalating environmental challenges, and the development of sustainable solutions is imperative.