Journal
FEBS LETTERS
Volume 588, Issue 7, Pages 1109-1115Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2014.02.028
Keywords
Rpi-blb2; AVRblb2; SGT1; Salicylic acid; Resistance; Phytophthora infestans; Nicotiana benthamiana
Funding
- Cabbage Genomics Assisted Breeding Supporting Center research program
- Ministry for Food, Agriculture, Forestry and Fisheries
- Agricultural Genome Center of the Next Generation Biogreen 21 program [PJ008199012011]
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The Rpi-blb2 recognizes the presence of the Phytophthora infestans AVRblb2 and initiates effector-triggered immunity (ETI). We performed gain-of-function and loss-of-function studies in Nicotiana benthamiana to elucidate Rpi-blb2-mediated resistance to P. infestans. Rpi-blb2 triggered a hypersensitive response through SGT1-mediated, but not RAR-mediated or HSP90-mediated, pathways. NbSGT1 was also required for basal and ETI-mediated by Rpi-blb2 in N. benthamiana. Moreover, salicylic acid (SA) affected basal defense and Rpi-blb2-mediated resistance against P. infestans. The increased susceptibility of Rpi-blb2-transgenic plants in the NahG-background correlated with reduced levels of SA. These findings provide evidence for the roles of SGT1- and SA-signaling in Rpi-blb2-mediated resistance against P. infestans. (C) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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