Insights into the role of jasmonic acid-mediated defenses against necrotrophic and biotrophic fungal pathogens
Christopher J. ANTICO , Chad COLON , Taylor BANKS , Katrina M. RAMONELL
Front. Biol. ›› 2012, Vol. 7 ›› Issue (1) : 48 -56.
Insights into the role of jasmonic acid-mediated defenses against necrotrophic and biotrophic fungal pathogens
Jasmonic acid (JA) is a natural hormone regulator involved in development, responses against wounding and pathogen attack. Upon perception of pathogens, JA is synthesized and mediates a signaling cascade initiating various defense responses. Traditionally, necrotrophic fungi have been shown to be the primary activators of JA-dependent defenses through the JA-receptor, COI1. Conversely, plants infected with biotrophic fungi have classically been associated with suppressing JA-mediated responses. However, recent evidence has shown that certain biotrophic fungal species also trigger activation of JA-mediated responses and mutants deficient in JA signaling show an increase in susceptibility to certain biotrophic fungal pathogens. These findings suggest a new role for JA in defense against fungal biotrophs. This review will focus on recent research advancing our knowledge of JA-dependant responses involved in defense against both biotrophic and necrotrophic fungi.
jasmonic acid (JA) / methyl jasmonate (MeJA) / biotrophic fungi / necrotrophic fungi / COI1
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Higher Education Press and Springer-Verlag Berlin Heidelberg
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