Table 2.
R Gene Requirements for RAR1
| Pathogen | Isolate/ Strain |
R gene | NB-LRR Class |
rar1 Phenotype |
|---|---|---|---|---|
| P. parasitica | Noco2 | RPP5 | TIR | S |
| Hiks1 | RPP7a | ? | R | |
| Emco5 | RPP8 | CC | R | |
| Maks9 | RPP21 | ? | (S) | |
| Cala2 | RPP2b | TIR | R | |
| Emwa1 | RPP4b | TIR | S | |
| Cala2 | RPP1Ac | TIR | R | |
| P. syringae pv | avrRpm1 | RPM1 | CC | S |
| tomato (DC3000) | avrRpt2 | RPS2 | CC | S |
| avrRps4 | RPS4 | TIR | S | |
| avrPphB | RPS5b | CC | S |
All pathogen tests were carried out using rar1-10. Plant lines were spray inoculated with P. parasitica isolates and resistance or susceptibility scored seven days after inoculation by measuring the extent of host cell death and pathogen sporulation on inoculated leaves. Suspensions of the different P. syringae strains were infiltrated into leaves and pathogen growth and disease symptom development recorded over five days. The structures of RPP8 (McDowell et al., 1998), RPP2 (Holub, 2001); RPP1A (Botella et al., 1998), RPM1 (Grant et al., 1995), RPS2 (Bent et al., 1994), RPS4 (Gassmann et al., 1999) and RPS5 (Warren et al., 1998) have been described.
RPP7 in Ler is defined as a locus cosegregating with Col-0 RPP7 in >4000 Col-0 × Ler F2 seedlings but may differ from Col-0 RRP7 (E. Holub, personal communication).
R gene introduced from Col-0 by crossing with Ler rar1-10.
R gene introduced from Ws-0 by crossing. CC, coiled coil; TIR, Toll-Interleukin-1 Receptor; ?, unknown; R, resistant; S, susceptible; (S), partially susceptible.