Abstract:
:Resistance genes (R genes) in plants mediate a highly specific response to microbial pathogens, often culminating in localized cell death. Such resistance is generally pathogen race specific and believed to be the result of evolutionary selection pressure. Where a host and pathogen do not share an evolutionary history, specific resistance is expected to be absent or rare. Puccinia psidii, the causal agent of myrtle rust, was recently introduced to Australia, a continent rich in myrtaceous taxa. Responses within species to this new pathogen range from full susceptibility to resistance. Using the myrtle rust case study, we examine models to account for the presence of resistance to new encounter pathogens, such as the retention of ancient R genes through prolonged 'trench warfare', pairing of resistance gene products and the guarding of host integrity.
journal_name
Mol Plant Patholjournal_title
Molecular plant pathologyauthors
Tobias PA,Guest DI,Külheim C,Hsieh JF,Park RFdoi
10.1111/mpp.12331subject
Has Abstractpub_date
2016-06-01 00:00:00pages
783-8issue
5eissn
1464-6722issn
1364-3703journal_volume
17pub_type
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