Abstract
Auxin influences a variety of developmental and physiological processes in plants. Recently, much progress has been made to understand the role of auxin under various abiotic stresses. Rapid alteration in plant root architecture in response to abiotic stress is achieved largely through auxin. Various auxin signaling components exist in plants, which mediate diverse physiological and developmental plant processes under various stresses. This chapter covers auxin production, transport, and signal transduction in response to abiotic stresses such as heavy metal stress, nutrient deficiency, drought, salinity, and temperature stress. It discusses that auxin functions as a hub, which integrates genetic and environmental information to achieve the appropriate physiological and developmental response of plants. Therefore, targeting various auxin signaling components might be a potential strategy to enhance plant tolerance to abiotic stress.
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