Abstract
The sedentary life of plants has forced them to live in an environment that is characterized by the presence of numerous challenges in terms of biotic and abiotic stresses. Phytohormones play essential roles in mediating plant physiology and alleviating various environmental perturbations. Jasmonates are a group of oxylipin compounds occurring ubiquitously in the plant kingdom that play pivotal roles in response to developmental and environmental cues. Jasmonates (JAs) have been shown to participate in unison with key factors of other signal transduction pathway, including those involved in response to abiotic stress. Recent findings have furnished large body of information suggesting the role of jasmonates in cold and heat stress. JAs have been shown to regulate C-repeat binding factor (CBF) pathway during cold stress. The interaction between the integrants of JA signaling and components of CBF pathway demonstrates a complex relationship between the two. JAs have also been shown to counteract chilling stress by inducing ROS avoidance enzymes. In addition, several lines of evidence suggest the positive regulation of thermotolerance by JA. The present review provides insights into biosynthesis, signal transduction pathway of jasmonic acid and their role in response to temperature stress.
Highlights
Adequate perception, amalgamation and transduction of signals are obligatory for the growth and development of an organism
They contain N-terminal domain, a highly conserved Cterminal Jas domain that mediates the interaction with the COI1 and several transcription factors, and the conserved protein- protein interaction domain, the ZN-FINGER PROTEIN EXPRESSED IN INFLORESCENCE MERISTEM (ZIM) (TIFY) domain that helps in JASMONATE ZIM DOMAIN (JAZ) dimerization and interaction with NOVEL INTERACTOR OF JAZ (NINJA) (Vanholme et al, 2007; Chung et al, 2009; Pauwels and Goossens, 2011; Wasternack and Hause, 2013)
Findings by Miura and Ohta (2010) have indicated Inducer of CBF EXPRESSION 1 (ICE1) to be an essential integrator of salicylic acid (SA) signaling and cold response pathway. ice1 mutant showed an up-regulation of SA-inducible genes
Summary
Reviewed by: Oksoo Han, Chonnam National University, South Korea Jianye Chen, South China Agricultural University, China. Phytohormones play essential roles in mediating plant physiology and alleviating various environmental perturbations. Jasmonates are a group of oxylipin compounds occurring ubiquitously in the plant kingdom that play pivotal roles in response to developmental and environmental cues. Jasmonates (JAs) have been shown to participate in unison with key factors of other signal transduction pathway, including those involved in response to abiotic stress. Recent findings have furnished large body of information suggesting the role of jasmonates in cold and heat stress. JAs have been shown to regulate C-repeat binding factor (CBF) pathway during cold stress. JAs have been shown to counteract chilling stress by inducing ROS avoidance enzymes. The present review provides insights into biosynthesis, signal transduction pathway of jasmonic acid and their role in response to temperature stress
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