Figure 10.

PGX1^AT, PGX1^OE, and pgx1 Mutants Possess Flowers with Extra Petals.

(A) and (B) Flowers of 6-week-old Col, PGX1^AT, PGX1^OE-1, PGX1^OE-48, pgx1-1, and pgx1-2 plants grown in a 16-h-light/8-h-dark photoperiod. In (A), yellow arrowheads indicate flowers with four petals and cyan arrowheads indicate flowers with extra petals. In (B), flowers were isolated (top panels) and dissected to reveal petal bases (bottom panels). Bars = 1 mm.

(C) Scanning electron micrographs of Col, PGX1^AT, PGX1^OE, and pgx1 floral meristems. Bar = 100 μm.

(D) Box plot distributions of floral primordium pair angles from Col, PGX1^AT, PGX1^OE, and pgx1 plants. Whiskers define data range, dark-gray boxes define second quartiles, and light-gray bars define third quartiles (n ≥ 39 measurements per genotype). Lowercase letters indicate significantly different groups (P < 0.05, one-way ANOVA and Tukey test).