Fig. 3.

(A) Histogram of FCSS with five peaks: 1 and 2, standard Zea mays in the G₁ and G₂ phase, respectively; 3–5, Ranunculus kuepferi (Rk): 3, 3 Cx, embryo G₁ phase; 4, embryo G₂ phase; 5, 10 Cx endosperm (peak G₁ phase). (B) Scheme of the respective embryo sac after fertilization, illustrating a triploid unfertilized embryo corresponding to peak 3, and the 10 Cx endosperm corresponding to peak 5. Since the mother plant was tetraploid, the embryo sac must have developed via a disturbed meiosis. The 3x em developed without fertilization, the endosperm via pseudogamy.