ABSTRACT
Phytohormones are crucial players in inducing stress-resistance in response to diverse environmental stimulus. The understanding of the mechanisms involved in environmental stresses is mandatory for the subsistence of plant growth and endurance. The plant growth regulators (PGRs), mainly jasmonates (JAs) a key immunity hormone, coordinate hormone-mediated growth and defence signalling in stressful environments. JAs take part in various signal transduction pathways as the primary defence hormone, such as regulatory proteins, gene networks, signalling intermediates, enzymes, and proteins. Jasmonate signalling includes several functional units, such as various mediators, corepressors, and coactivators that switch on/off the jasmonate-mediated transcriptional activation. Recent investigations have provided wide-ranging information indicating jasmonates’ potential role in providing cold and heat stress resistance. JAs regulate the C-repeat binding factor (CBF) pathway upon cold stress stimulus. Moreover, different information suggests the positive control of JAs in conferring thermo-tolerance. JAs have also been shown to combat cold and heat stress through activating the ROS detoxifying antioxidants. However, JA does not perform an independent regulatory role but interacts with other phytohormone signalling pathways in a sophisticated signal network. The present chapter provides understandings of jasmonate signal transduction pathways and their productive role in temperature stress responses.
