To generate the sog1-7 and suv2-3 mutations, als3-1 seeds were treated with EMS. M2 seedlings were screened for mutants that suppressed the hypersensitivity of als3-1 to Al in a 0.75 mM AlCl3 gel soaked environment. EMS treated seeds were planted around the periphery of the plates and were grown for 7 days at 20°C with …