Figure 4.

Seed Germination of atpirin1 and gpa1 Mutants.

(A) Germination of wild-type Col and atpirin1-2 mutant seeds.

(B) Germination of wild-type Ws, atpirin1-1, gpa1-1, and gpa1-2 mutant seeds.

Matched seed lots on premoistened filter paper were placed directly at 22°C under continuous white light for germination. Values presented are mean percentages of germination from three independent experimental replicates (each replicate included 70 to 150 seeds per line) with standard errors. Heterozygous and homozygous mutants are indicated by +/− and −/−, respectively, next to the corresponding mutant genotype. Germination data for stratified wild-type Col seeds (wild type Col str.) and stratified wild-type Ws seeds (wild type Ws str.) are included in (A) and (B), respectively. Upon stratification, there was no statistically significant difference in germination rates between wild-type and corresponding mutant seeds.