Updated project metadata. The ppi2 mutant introgressed into the Columbia-0 ecotype as previously reported. Doublemutant ppi2xrpn8a was crossed with the above referenced genotypes using heterozygous ppi2 plants. After 2 days of stratification at 4 °C the plants were grown on half-strength Murashige and Skoog (M&S) medium supplemented with 0.8% (w/v) plant agar (Duchefa) and 0.8% (w/v) sucrose under short day conditions.