Table 1.

Selection of Arabidopsis pst Mutants

Ecotype	Mutagenesis	No. Screened Lines	No. Screened Plants	No. pst Lines
Columbia	Ethyl methanesulfonate	17,400	109,100	2
Wassilewskija	T-DNA tagging^{^a}	4,900	39,200	0
Total		22,300	148,300	2

↵^a Made by Feldmann (1991) and supplied by the Nottingham Arabidopsis Stock Centre.