A molecular evolutionary concept connecting nonhost resistance, pathogen host range, and pathogen speciation.


:Any given pathogenic microbial species typically colonizes a limited number of plant species. Plant species outside of this host range mount nonhost disease resistance to attempted colonization by the, in this case, non-adapted pathogen. The underlying mechanism of nonhost immunity and host immunity involves the same non-self detection systems, the combined action of nucleotide-binding and leucine-rich repeat (NB-LRR) proteins and pattern recognition receptors (PRRs). Here we hypothesize that the relative contribution of NB-LRR- and PRR-triggered immunity to nonhost resistance changes as a function of phylogenetic divergence time between host and nonhost. Similarly, changes in pathogen host range, e.g. host range expansions, appear to be driven by variation in pathogen effector repertoires, in turn leading to reproductive isolation and subsequent pathogen speciation.


Trends Plant Sci


Trends in plant science


Schulze-Lefert P,Panstruga R




Has Abstract


2011-03-01 00:00:00














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