Chapter 15 - Hormonal crosstalk in abiotic stress responses

Abstract

Plant abiotic stresses are one of the major environmental stresses affecting plant growth, development, and productivity and are regarded as the core sources of crop losses globally. To date, several studies have demonstrated that various plant hormones have nonredundant signaling pathways that have special and significant functions in mediating plant abiotic stresses. The signaling pathways and interactions involving plant hormones are intriguingly complex; they can work in a synergistic, antagonistic, overlapping, or additive manner in response to stresses. The interactions involving plant hormones are crucial as they regulate secondary plant biological processes that control both stress responses and plant growth and development. Studying how various hormones interact in response to plant abiotic stresses is critical for researchers to understand the fundamental molecular mechanisms and signaling networks involved in hormone interactions to effectively address abiotic stress-related plant problems. Therefore, this chapter discusses the major plant phytohormones and their crosstalks in plant responses to abiotic stress.