Jun 28, 2014 - Springer Science+Business Media New York 2014. Abstract The plant .... The central role of small-molecule hormones in controlling the expression of ..... 2007; Seo et al. 2007; Wu and ..... resistance. Indeed, there is good evidence that JATI is a .... technological tools available, exciting new discoveries may.
J Chem Ecol (2014) 40:657–675 DOI 10.1007/s10886-014-0468-3
REVIEW ARTICLE
Jasmonate-Triggered Plant Immunity Marcelo L. Campos & Jin-Ho Kang & Gregg A. Howe
Received: 22 April 2014 / Revised: 6 June 2014 / Accepted: 17 June 2014 / Published online: 28 June 2014 # Springer Science+Business Media New York 2014
Abstract The plant hormone jasmonate (JA) exerts direct control over the production of chemical defense compounds that confer resistance to a remarkable spectrum of plantassociated organisms, ranging from microbial pathogens to vertebrate herbivores. The underlying mechanism of JAtriggered immunity (JATI) can be conceptualized as a multistage signal transduction cascade involving: i) pattern recognition receptors (PRRs) that couple the perception of danger signals to rapid synthesis of bioactive JA; ii) an evolutionarily conserved JA signaling module that links fluctuating JA levels to changes in the abundance of transcriptional repressor proteins; and iii) activation (de-repression) of transcription factors that orchestrate the expression of myriad chemical and morphological defense traits. Multiple negative feedback loops act in concert to restrain the duration and amplitude of defense responses, presumably to mitigate potential fitness costs of JATI. The convergence of diverse plant- and non-plantderived signals on the core JA module indicates that JATI is a general response to perceived danger. However, the modular structure of JATI may accommodate attacker-specific defense responses through evolutionary innovation of PRRs (inputs) and defense traits (outputs). The efficacy of JATI as a defense M. L. Campos : J.
