Ve1-mediated resistance against Verticillium does not involve a hypersensitive response in Arabidopsis
Zhang, Z. ; Esse, H.P. van; Damme, M. van; Fradin, E.F. ; Liu, Chun-Ming ; Thomma, B.P.H.J. - \ 2013
Molecular Plant Pathology 14 (2013)7. - ISSN 1464-6722 - p. 719 - 727.
ethylene-inducing xylanase - receptor-like proteins - gated ion-channel - disease resistance - rhynchosporium-secalis - functional-analysis - defense responses - gene family - tomato ve1 - cell-death
The recognition of pathogen effectors by plant immune receptors leads to the activation of immune responses that often include a hypersensitive response (HR): rapid and localized host cell death surrounding the site of attempted pathogen ingress. We have demonstrated previously that the recognition of the Verticillium dahliae effector protein Ave1 by the tomato immune receptor Ve1 triggers an HR in tomato and tobacco. Furthermore, we have demonstrated that tomato Ve1 provides Verticillium resistance in Arabidopsis upon Ave1 recognition. In this study, we investigated whether the co-expression of Ve1 and Ave1 in Arabidopsis results in an HR, which could facilitate a forward genetics screen. Surprisingly, we found that the co-expression of Ve1 and Ave1 does not induce an HR in Arabidopsis. These results suggest that an HR may occur as a consequence of Ve1/Ave1-induced immune signalling in tomato and tobacco, but is not absolutely required for Verticillium resistance.
Loss of susceptibility as a novel breeding strategy for durable and broad-spectrum resistance
Pavan, S.N.C. ; Jacobsen, E. ; Visser, R.G.F. ; Bai, Y. - \ 2010
Molecular Breeding 25 (2010). - ISSN 1380-3743 - p. 1 - 12.
powdery mildew resistance - systemic acquired-resistance - oryzae pv. oryzae - arabidopsis mutant cev1 - initiation-factor eif4e - lettuce-mosaic-virus - yellow-mottle-virus - gated ion-channel - barley mlo-gene - nonhost resistance
Recent studies on plant immunity have suggested that a pathogen should suppress induced plant defense in order to infect a plant species, which otherwise would have been a nonhost to the pathogen. For this purpose, pathogens exploit effector molecules to interfere with different layers of plant defense responses. In this review, we summarize the latest findings on plant factors that are activated by pathogen effectors to suppress plant immunity. By looking from a different point of view into host and nonhost resistance, we propose a novel breeding strategy: disabling plant disease susceptibility genes (S-genes) to achieve durable and broad-spectrum resistance