Plant Hormonal Crosstalk: A Nexus of Root Development

Abstract

The plant root is an essential organ that participates in several biological functions such as water and nutrient uptake as well as anchorage. Besides, roots also play a critical role in conferring stress tolerance in plants. In recent years, a lot of emphasis has been given to understand the key mechanisms involved in root morphogenesis and development. Among various factors controlling root growth and development, the role of plant hormones has been studied extensively. The modern experimental tools and resources have uncovered the critical role of plant hormones such as auxin, gibberellins, brassinosteroids, and strigolactones in regulating the signaling mechanisms involved in plant root development. Plant hormones are perceived by their respective receptors, which subsequently activate various signal transduction pathways to regulate root development. These plant hormones also integrate their signals to interact either synergistically or antagonistically in a coordinated manner to control various aspects associated with root morphogenesis and development. The present book chapter highlights some critical conceptual developments in the participation of plant hormones and their crosstalk in regulating various signaling components involved in root development.