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Signalling cascades involved in induced resistance

By C.M.J. Pieterse and L.C. van Loon


Plant innate immunity is based on a surprisingly complex response that is highly flexible in\ud its capacity to recognize and counteract different invaders. To effectively combat invasion by\ud microbial pathogens and herbivorous insects, plants make use of pre-existing physical\ud and chemical barriers, as well as inducible defence mechanisms that become activated\ud upon attack. Apart from reacting locally, plants can mount a systemic\ud response, establishing an enhanced defensive capacity in parts distant from the site of primary\ud attack. This systemically induced response protects the plant against subsequent invaders.\ud Several biologically induced, systemic defence responses have been characterized in\ud detail, such as systemic acquired resistance (SAR), which is triggered by pathogens causing\ud limited infection, such as hypersensitive necrosis, rhizobacteria\ud induced systemic resistance (ISR), which is activated upon colonization of roots by\ud selected strains of non-pathogenic rhizobacteria, and wound induced defence, which is typically elicited upon\ud tissue damage, such as caused by insect feeding

Topics: Biologie, plant immune response, induced resistance, defense signaling, priming, cross-talk, ISR
Year: 2007
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