Plant nonhost resistance: paradigms and new environments. (August 2019)

• Record Type: Journal Article
• Authors: Ayliffe, Michael; Sørensen, Chris K
• Is Part Of: Current opinion in plant biology. Volume 50(2019)
• Page Start: 104
• Page End: 113
• Publication Date: 2019-08
• Subjects: Plant molecular biology -- Periodicals; 571.205
• DOI: 10.1016/j.pbi.2019.03.011
• Languages: English
• ISSNs: 1369-5266

Abstract

Highlights: Pathogen effectors define plant host and nonhost outcomes. Nonhost resistance genes can be functionally transferred to host species. Altered plant/pathogen distributions can cause pathogen expansion and host jumps. Climate change models suggest future changes in plant/pathogen distributions. Abstract : Nonhost resistance (NHR) protects plants from a large and diverse array of potential phytopathogens. Each phytopathogen can parasitise some plant species, but most plant species are nonhosts that are innately immune due to a series of physical, chemical and inducible defenses these nonadapted pathogens cannot overcome. New evidence supports the NHR paradigm that posits the inability of potential pathogens to colonise nonhost plants is frequently due to molecular incompatibility between pathogen virulence factors and plant cellular targets. While NHR is durable, it is not insurmountable. Environmental changes can facilitate pathogen host jumps or alternatively result in new encounters between previously isolated plant species and pathogens. Climate change is predicted to substantially alter the current distribution of plants and their pathogens which could result in parasitism of new plant species.