Figure 3.

Flowering phenotype of php plants. A, Wild-type ecotype Col-0 (left), php-1 (center), and php-1 expressing a PHP-FLAG transgene (right) after 4 weeks of growth. B, Summary of total leaves formed on the main shoot for wild-type ecotype Col-0, Col-0 carrying an introgressed, dominant FRI allele (Col:FRI), and php mutants. Plants were grown under flowering-inductive (16 h light/8 h dark; I) or noninductive (8 h light, 16 h dark; NI) photoperiods. To evaluate the vernalization response, germinating seeds were maintained in the cold for 12, 21, 35, or 70 d. Values represent the mean and sd for at least 12 plants. C, Analysis of flowering in double mutants. Plants were grown under inductive photoperiods. [See online article for color version of this figure.]