Table 2. Quantification and Statistical Analysis of Flower Numbers with Additional Petals in PGX1 Mutant and Overexpression Lines.

Genotype	Col	PGX1AT	Col	PGX1OE-1	Col	PGX1OE-48	Col	pgx1-1	Col	pgx1-2
No. flowers w/four petals	895	844	244	255	829	832	1187	1412	1011	887
No. flowers w/five petals	39	85	6	13	20	39	35	66	24	54
Percentage w/extra petals	4.18	9.15	2.40	4.85	2.36	4.48	2.86	4.47	2.32	5.74
P (χ2)	4.0 × 10−14		3.2 × 10−3		2.1 × 10−5		5.6 × 10−17		3.9 × 10−13
No. replicates	3		1		2		4		3

All completely open flowers were counted for each experiment. The percentage indicates the ratio of flowers with five or more petals to total completely open flowers.