TY - JOUR
T1 - Exploiting Knowledge of R/Avr Genes to Rapidly Clone a New LZ-NBS-LRR Family of Late Blight Resistance Genes from Potato Linkage Group IV
AU - Lokossou, Anoma A.
AU - Park, Tae-ho
AU - van Arkel, Gert
AU - Arens, Marjon
AU - Ruyter-Spira, Carolien
AU - Morales, Juan
AU - Whisson, Steve C.
AU - Birch, Paul R. J.
AU - Visser, Richard G. F.
AU - Jacobsen, Evert
AU - van der Vossen, Edwin A. G.
PY - 2009/6
Y1 - 2009/6
N2 - In addition to the resistance to Phytophthora infestans (Rpi) genes Rpi-blb1 and Rpi-blb2, Solanum bulbocastanum appears to harbor Rpi-blb3 located at a major late blight resistance locus on LG IV, which also harbors Rpi-abpt, R2, R2-like, and Rpi-mcd1 in other Solanum spp. Here, we report the cloning and functional analyses of four Rpi genes, using a map-based cloning approach, allele-mining strategy, Gateway technology, and transient complementation assays in Nicotiana benthamiana. Rpi-blb3, Rpi-abpt, R2, and R2-like contain all signature sequences characteristic of leucine zipper nucleotide binding site leucine-rich repeat (LZ-NBS-LRR) proteins, and share amino-acid sequences 34.9% similar to RPP13 from Arabidopsis thaliana. The LRR domains of all four Rpi proteins are highly homologous whereas LZ and NBS domains are more polymorphic, those of R2 being the most divergent. Clear blocks of sequence affiliation between the four functional resistance proteins and those encoded by additional Rpi-blb3 gene homologs suggest exchange of LZ, NBS, and LRR domains, underlining the modular nature of these proteins. All four Rpi genes recognize the recently identified RXLR effector PiAVR2.
AB - In addition to the resistance to Phytophthora infestans (Rpi) genes Rpi-blb1 and Rpi-blb2, Solanum bulbocastanum appears to harbor Rpi-blb3 located at a major late blight resistance locus on LG IV, which also harbors Rpi-abpt, R2, R2-like, and Rpi-mcd1 in other Solanum spp. Here, we report the cloning and functional analyses of four Rpi genes, using a map-based cloning approach, allele-mining strategy, Gateway technology, and transient complementation assays in Nicotiana benthamiana. Rpi-blb3, Rpi-abpt, R2, and R2-like contain all signature sequences characteristic of leucine zipper nucleotide binding site leucine-rich repeat (LZ-NBS-LRR) proteins, and share amino-acid sequences 34.9% similar to RPP13 from Arabidopsis thaliana. The LRR domains of all four Rpi proteins are highly homologous whereas LZ and NBS domains are more polymorphic, those of R2 being the most divergent. Clear blocks of sequence affiliation between the four functional resistance proteins and those encoded by additional Rpi-blb3 gene homologs suggest exchange of LZ, NBS, and LRR domains, underlining the modular nature of these proteins. All four Rpi genes recognize the recently identified RXLR effector PiAVR2.
KW - PHYTOPHTHORA-INFESTANS MONT
KW - BROAD-SPECTRUM RESISTANCE
KW - PLANT IMMUNE-SYSTEM
KW - DISEASE RESISTANCE
KW - SOLANUM-BULBOCASTANUM
KW - DOWNY MILDEW
KW - R-GENE
KW - QUANTITATIVE RESISTANCE
KW - ARABIDOPSIS-THALIANA
KW - OOMYCETE EFFECTORS
U2 - 10.1094/MPMI-22-6-0630
DO - 10.1094/MPMI-22-6-0630
M3 - Article
C2 - 19445588
SN - 0894-0282
VL - 22
SP - 630
EP - 641
JO - Molecular Plant - Microbe Interactions
JF - Molecular Plant - Microbe Interactions
IS - 6
ER -