McLellan, H.* ; Harvey, S.E.* ; Steinbrenner, J.* ; Armstrong, M.R.* ; He, Q.* ; Clewes, R.* ; Pritchard, L.* ; Wang, W.* ; Wang, S.* ; Nussbaumer, T. ; Dohai, B.S.M. ; Luo, Q.* ; Kumari, P.* ; Duan, H.* ; Roberts, A.* ; Boevink, P.C.* ; Neumann, C.* ; Champouret, N.* ; Hein, I.* ; Falter-Braun, P. ; Beynon, J.* ; Denby, K.* ; Birch, P.R.J.*
     
 
    
        
Exploiting breakdown in nonhost effector-target interactions to boost host disease resistance.
    
    
        
    
    
        
        Proc. Natl. Acad. Sci. U.S.A. 119:e2114064119 (2022)
    
    
    
		
		
			
				Plants are resistant to most microbial species due to nonhost resistance (NHR), providing broad-spectrum and durable immunity. However, the molecular components contributing to NHR are poorly characterised. We address the question of whether failure of pathogen effectors to manipulate nonhost plants plays a critical role in NHR. RxLR (Arg-any amino acid-Leu-Arg) effectors from two oomycete pathogens, Phytophthora infestans and Hyaloperonospora arabidopsidis, enhanced pathogen infection when expressed in host plants (Nicotiana benthamiana and Arabidopsis, respectively) but the same effectors performed poorly in distantly related nonhost pathosystems. Putative target proteins in the host plant potato were identified for 64 P. infestans RxLR effectors using yeast 2-hybrid (Y2H) screens. Candidate orthologues of these target proteins in the distantly related non-host plant Arabidopsis were identified and screened using matrix Y2H for interaction with RxLR effectors from both P. infestans and H. arabidopsidis. Few P. infestans effector-target protein interactions were conserved from potato to candidate Arabidopsis target orthologues (cAtOrths). However, there was an enrichment of H. arabidopsidis RxLR effectors interacting with cAtOrths. We expressed the cAtOrth AtPUB33, which unlike its potato orthologue did not interact with P. infestans effector PiSFI3, in potato and Nicotiana benthamiana. Expression of AtPUB33 significantly reduced P. infestans colonization in both host plants. Our results provide evidence that failure of pathogen effectors to interact with and/or correctly manipulate target proteins in distantly related non-host plants contributes to NHR. Moreover, exploiting this breakdown in effector-nonhost target interaction, transferring effector target orthologues from non-host to host plants is a strategy to reduce disease.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
        Typ der Hochschulschrift
        
    
 
    
        Herausgeber
        
    
    
        Schlagwörter
        Effector-triggered Susceptibility ; Host Range ; Oomycete ; Plant Immunity ; Plant–microbe Interactions
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2022
    
 
    
        Prepublished im Jahr 
        
    
 
    
        HGF-Berichtsjahr
        2022
    
 
    
    
        ISSN (print) / ISBN
        0027-8424
    
 
    
        e-ISSN
        1091-6490
    
 
    
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	    Band: 119,  
	    Heft: 35,  
	    Seiten: ,  
	    Artikelnummer: e2114064119 
	    Supplement: ,  
	
    
 
  
        
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            Verlag
            National Academy of Sciences
        
 
        
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        Begutachtungsstatus
        Peer reviewed
    
 
    
        Institut(e)
        Institute of Network Biology (INET)
    
 
    
        POF Topic(s)
        30203 - Molecular Targets and Therapies
    
 
    
        Forschungsfeld(er)
        Environmental Sciences
    
 
    
        PSP-Element(e)
        G-506400-001
    
 
    
        Förderungen
        
UKRI | Biotechnology and Biological Sciences Research Council (BBSRC)
    
 
    
        Copyright
        
    
 	
    
    
    
    
    
        Erfassungsdatum
        2022-11-14